Planned Development StandardsTHIRD SUBMITTAL NOVEMBER 9, 2018

CASE NO. ZAX 2016-44

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Table of Contents

1.0 General Planned Development Standards.........................................3

1.1 Permitted Use Chart•••4

2.0 Residential Planned Development Standards...................................9

2.1 General Residential Standards•••102.2 Lot Size•••112.3 Minimum Building Setbacks•••112.4 Building Height•••122.5 Green Courts•••122.6 Motor Courts•••122.7 Multifamily Standards•••18

3.0 Main Street Commercial Planned Development Standards........21

3.1 Main Street Commercial Planned Development Standards•••22

3.0 Commercial Planned Development Standards........23

3.1 Commercial Planned Development Standards•••24

5.0 Industrial Planned Development Standards.....................................25

5.1 Industrial Planned Development Standards•••26

6.0 Architecture Planned Development Standards...............................27

6.1 General Architecture Standards•••286.2 Residential Architecture Palette•••286.3 Main Street Commercial Architecture Palette•••286.4 Commercial Architecture Palette•••356.5 Industrial Architecture Palette•••35

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7.0 Landscape Planned Development Standards....................................37

7.1 General Landscape Standards•••387.2 Public Landscaped Areas•••387.3 Retaining Wall Requirements•••397.4 Plant Material Requirements•••397.5 Irrigation Requirements•••397.6 Site Furnishings•••407.7 Residential Landscape Standards•••407.8 Main Street Commercial Landscape Standards•••417.9 Main Street Commercial Landscape Standards•••417.10 Industrial Landscape Standards•••41

8.0 Circulation Planned Development Standards...................................43

8.1 General Standards •••448.2 Street Standards (Public and Private)•••448.3 Pedestrian and Bicyclist Circulation•••448.4 Traffic Calming•••45

9.0 Recreation Planned Development Standards...................................47

9.1 General Recreation Standards•••489.2 Role of the Metro District•••489.3 Public Land Dedication (PLD)•••489.4 Design, Construction and Maintenance of Parks and Recreation Areas•••509.5 Quality Enhancements for PD Zoning•••50

1.0General Planned Development Standards

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Use

Zoning Category

SFDSFD-SM / SFA

MF MSC C I1 I2 POS

Accessory Uses

Accessory community center - private S S R - - - - -

Accessory dwelling unit R - - - - - - -

Accessory game court - private S S R - - - - -

Accessory outside display of merchandise - - - R R - - -

Accessory outside sales - - - R R - - -

Accessory outside storage R R R R R R R -

Amateur telecommunication facility R R R R R R R -

Attachment of telecommunication antennae to existing structure R R R R R R R -

Home occupation R R R - - - - -

Occasional sales - garage sales R R R - - - - -

Solar collectors R R R R R R R -

Television reception antenna R R R R R R R -

Agricultural Uses

Community garden R R R R R R R R

Industrial Uses

Industrial - inside (high risk) - - - - - S R -

Industrial - inside (not high risk) - - - - - R R -

Industrial - outside (not high risk) - - - - - R R -

1.1 Permitted Use Chart

All allowed uses are listed in the Permitted Use Chart below and on the following pages. All permit requirements are defined by the City’s Development Code.

R Permitted Use by Right S Use Permitted by Specific Use Permit - Excluded Use T Temporary Use

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Use

Zoning Category

SFDSFD-SM / SFA

MF MSC C I1 I2 POS

Institutional and Community Service Uses

Assisted living R R R - R - - -

Church S S S S R S S -

Cultural arts facility S S R R R R R S

Day care facility S S S R R - - -

Nursing, convalescent homes and hospices - S R S R - - -

Schools, public and private S S S S R R R -

Office Uses

Financial institution (with drive-in window) - - - - R R R -

Financial institution (without drive-in window) - - - R R R R -

General office - - - R R R R -

Medical clinic - - - R R R R -

Recreation Uses

Community park, recreation center or golf course S S S - R R R R

Country club with private membership S S S - R R R R

Neighborhood park or playground R R R R R R R R

Private recreation center, club or area S S S R R R R -

Residential Uses

Multifamily dwellings - S R - - - - -

Retirement housing - S R - R - - -

Single-family attached residential units (including townhomes or duplexes) - R S - - - - -

Single-family detached residential units R S - - - - - -

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Use

Zoning Category

SFDSFD-SM / SFA

MF MSC C I1 I2 POS

Retail and Personal Service Uses

Animal clinic without outside runs - - - R R R R -

Animal kennel without outside runs - - - - S R R -

Animal kennel with outside runs - - - - - S S -

Bar, lounge or tavern - - - R R - - -

Business school - - - R R R R -

Car wash - - - - R R R -

Catering service - - - - R R R -

Clubs and lodges - nonprofit - - - - R R R -

Commercial amusement - inside - - - R R R R -

Dry cleaning, laundry store - - - R R R R -

Equipment rental - - - - - R R -

General merchandise or food store 3,500 sf or less - - - R R R R -

General merchandise or food store greater than 3,500 sf - - - R R R R -

Home improvement centers, lumber, brick or building materials - - - - R R R -

Household equipment and appliance repair - - - - R R R -

Job printing - - - R R R R -

Liquor store - - - R R - - -

Mortuary, funeral home - - - - S S S -

Motor vehicle fueling station - - - - R R R -

Nursery, garden shop, and plant sales - - - R R R R -

Personal service use - - - R R R R -

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Use

Zoning Category

SFDSFD-SM / SFA

MF MSC C I1 I2 POS

Retail and Personal Service Uses (cont.)

Restaurant with drive-in or drive-through - - - - R R R -

Restaurant without drive-in or drive-through - - - R R R R -

Technical and trade schools - - - - R R R -

Theater - - - S R R R -

Vehicle display, sales, service, and storage - - - - S R R -

Temporary Uses

Christmas tree lots - - - T T T T -

Farmers’ market - - - T T T T T

Seasonal sales stand T T T T T T T T

Temporary concrete or asphalt batch plant T T T T T T T -

Temporary construction yard, or construction or sales office T T T T T T T -

Temporary donation collection bin - - - T T T T -

Temporary grazing - - - T T T T T

Traveling show, carnival, circus or special event - - - - T T T -

Transportation Uses

Heliports - - - - S S S -

Transit passenger shelter S S S R R R R S

Truck terminal - - - - - R R -

Utility and Public Service Uses

Animal shelter with outside runs - - - - S S S -

Animal shelter without outside runs - - - - R R R -

Commercial radio and TV station - - - - R R R -

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Use

Zoning Category

SFDSFD-SM / SFA

MF MSC C I1 I2 POS

Utility and Public Service Uses (cont.)

Electric substation and gas regulator station S S S S R R R R

Library S S S R R R R -

Local utilities R R R R R R R R

Police and fire stations - - - R R R R -

Post office - - - R R R R -

Telephone exchange without shops or offices - - - - - R R -

Water treatment plant, reservoir and water storage tanks - - - - - R R -

Wholesale, Distribution and Storage Uses

Contractor’s maintenance yard - - - - - R R -

Grain and feed elevators - - - - - R R -

Mini-warehouse - - - - - R R -

Office showroom / warehouse - - - - - R R -

Outdoor storage (1) - - - - - R R -

Warehouse - - - - - R R -

Wireless Telecommunication Uses

Commercial radio or TV facility - - - - - R R -

Commercial satellite dish - - - R R R R -

Mobile telephone facility - - - R R R R -

Public safety telecommunication facility - - - R R R R -

(1) In accordance with the uses allowed in the Employment - North Washington Overlay future land use category.

2.0Residential Planned Development

Standards

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2. See Landscape Section 7.0 for landscape requirements within buffer areas.

3. See Sections 2.3 and 2.7 for front, rear and side setbacks for single-family detached, single-family attached, and multifamily lots.

4. Setback encroachments of up to 2’ maximum are allowed for roof overhangs, windows, etc.

5. Setback encroachments for patios and decks listed in the lot standards will apply to patio covers and decks that require a building permit only. For the rear yards, decks and patio covers may encroach up to 10’, with the provision that they are never enclosed, are no higher than 8’ above grade, and not located in any easements.

E. The Residential Proximity Slope defined in the City Code shall not apply to City Creek. The ODP/CSP and these PD Standards have been designed to minimize negative impacts among uses by carefully transitioning densities across the site and specifying minimum setbacks. However, the following measures shall be taken to ensure compatible building scale and use transitions.

1. Where non-residential or multifamily uses are proposed adjacent to or across the street from single-family homes, their height shall be limited to 40’ within 30’ of the lot line, and to 50’ within 40’.

2. Where non-residential or multifamily uses are proposed adjacent to single-family homes, a buffer shall be provided consisting of a masonry wall, berm or vegetation. This buffer must be at least 6’ tall and capable of attaining full height and 100% opacity within 3 years.

3. Service areas for non-residential or multifamily uses shall not be located adjacent to single-family home lots.

2.1 General Residential StandardsA. Any requirements not addressed by these PD Standards will be governed by the Development Code regulations for the

most similar zone district or use.

B. Diverse residential products are envisioned for City Creek. Different product types not graphically depicted in these standards that meet the intent of the residential zoning categories may be approved by the Planning Director if they achieve the density requirements and the City Creek PD Architecture Standards.

C. Different lot sizes may be mixed within planning areas provided the lot type is allowed in that planning area.

D. SFD and SFA Landscape Buffers and Setbacks

1. The following landscape buffers are measured from the back of the curb to the property line.

Zoning Category Arterials

(152nd Parkway, Washington Street)

Adjacent

Non-Residential Use

Adjacent

MF Use

SFD & SFA 40’ 25’ 25’

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2.2 Lot Size

Front Loaded Product Min. Lot Frontage Min. Lot Area

Single Family Detached – Standard 50’ 4,500 SF

Single Family Detached – Small <50’ <4,500 SF

Duplexes 35’ 3,000 SF

Alternate Loaded Product Min. Lot Frontage Min. Lot Area

Single Family Detached 30’ 1,500 SF

Duplexes 25’ 1,250 SF

A. Alternate Loaded Product is a home design having garage doors facing in a direction other than the street on which the home fronts, including alley, green courts and motor courts.

B. Min. lot frontage or min. lot area for Alternate Loaded Product may not include an alley or common shared drive. The alley or shared drive may be in a tract or public assess easement.

C. Other than a duplex, no front-loaded product can be built on a lot less than 40’ in width.

2.3 Minimum Building Setbacks

Front Loaded Product Front Side Rear

Single Family Detached – Standard15’ House

20’ Garage5’ or building code 10’

Single Family Detached – Small10’ House

18’ Garage5’ or building code 10’

Duplexes10’ House

18’ Garage5’ or building code 10’

Alternate Loaded Product Front Side Rear

Single Family Detached10’ House

5’ Porch (A)5’ or building code

3’ if alley load or applicable

standard

Duplexes10’ House

5’ Porch(A)5’ or building code

3’ if alley load or applicable

standard

Single Family Attached10’ House

5’ Porch (A)10’ corner units 3’

A. Porches and stoops associated with a front setback less than 10’ shall be limited such that any roof element or associated structure is no greater than a single story. 5’ porch setback shall be increased if needed to accommodate utility infrastructure or required landscaping.

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2.4 Building HeightA. 38’

2.5 Green CourtsA. Green Court Widths

The green court width is calculated by measuring from the narrowest dimension of front building face to front building face. Porches and stoops facing the green court may extend up to 5-feet beyond the building face provided any roof or associated structure is no greater than a single story. If provided, porches shall be a minimum 40 square feet in area and a minimum 5’ wide in its narrowest dimension.

Minimum Green court width is 30’ or equivalent to the height of the tallest residential building facing the green court, whichever is greater. Building height is measured to the roof peak. For the purposes of defining Green Court width building height is measured to the highest point of the coping of a flat roof or the deck line of a mansard roof, or to the peak of a gable, pitched or hip roof.

B. Standards

1. All street connectivity and block standards of these regulations shall apply.

2. All dwelling units shall have front entry features (stoops and/or porches) fronting on a green court or a street.

3. No more than 16 dwelling units may face the same green court. The number of units facing a green court may be increased to 24 dwelling units, if both ends of the green court have frontage on a public street. If the number of units facing a Green Court exceed 16, in no case may the length of the Green Court exceed 360 feet in length.

4. Each green court shall have direct frontage on a street that includes on-street parking and sidewalks on both sides.

5. Most of the green court area shall be open with landscaping which should accommodate foot traffic and play areas. Sidewalks should be located to accommodate pedestrian access while maximizing use of the open area within the green court. Trees are allowed in open greens but should be located along the perimeter and typically be canopy tree species to allow usable space under the tree canopy.

6. Above grade utility, cable, telecommunication infrastructure or similar improvements should be located outside of the central green court area.

7. Maintenance and management of common areas shall be provided by a homeowner’s association or other similar entity.

C. Design Alternatives

The following design alternatives may be used to provide additional design flexibility for green courts.

1. Variable Green Court Width

Within a green court the width may vary and include portions that are less than the minimum when the following conditions are met.

a. The green court meets or exceeds all standards above and is consistent with the purpose and intent of this section;

b. At least 75% of the green court meets or exceed the minimum width requirement; and

c. In no case is the green court width less than 15-feet for 1-2 story, or 25-feet for 3 story buildings.

2. Narrow Green Court Width

In limited circumstances the director may approve green courts with the following reduced widths:

a. 20’ for 1-2 story; and

b. 30’ for three story.

This option shall be limited to not more than 6 dwelling units facing the green court and the units shall not exceed 3 stories. Reduced green court width shall be limited to 1 per block.

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2.6 Motor CourtsA. Standards

1. Homes adjacent to the street shall have front doors facing the street and garages facing the access drive.

2. 5’ porch setback must be increased if required to accommodate utilities, required landscape or other code requirements.

3. Minimum drainage and utility easement standards from the applicable Thornton Water or Public Works specifications shall apply to areas where public wet utilities (i.e. water meter pits) and/or surface drainage features (i.e. overflow tracts) are required.

4. Setbacks shall be measured from the outside lot lines of the motor court pod not individual lots. The front setback shall be the lot line adjacent to the street, rear is opposite the street and sides are perpendicular to the street. Minimum building separation of 10 feet or building code applies to internal lot line setbacks. Garage separation shall be a minimum of 30 feet from garage face to garage face.

5. Shared driveway may be in a tract or within a Public Access easement. If located within a Public Access easement, the area of the easement will not apply to the minimum lot area requirement in Lot Size Section 1 above.

6. Two off street guest parking spaces shall be provided for the rear units if more than four units are located on a single motor court.

7. A Fire Lane will be provided when hose pull lengths exceed 150 feet from the street.

8. Motor court access drive must be minimum 23’. A 16’ motor court drive aisle for the 4-unit motor court must be called out as a public access/access easement and posted as a No-Parking – Tow-Away area to ensure both homeowner access and fire department hose pull accessibility.

The graphics on the following pages illustrate the range of single family detached and attached housing products that are allowed under the preceding standards.

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Key Map

Conceptual Site Design Conceptual Architecture

Single Family Detached - Standard, Front Loaded

A

B

CD

E

F

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NML

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Key Map

Single Family Detached - Small, Alternate Loaded

A

B

CD

E

F

J

G

H

K

I

R S

NML

PO

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Conceptual Site Design Conceptual Architecture

E. 152nd Parkway

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A

B

CD

E

F

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NML

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E. 1

Key Map

Conceptual Site Design Conceptual Architecture

Duplex - Alternate Loaded

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Key Map

Conceptual Site Design Conceptual Architecture

Single Family Attached - Alternate Loaded

A

B

CD

E

F

J

G

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NML

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Residential Standards MFAccessory

Structure

Maximum Density (du/ac) 30 NA

Max. Height Allowed 60’ 16’

Floor Area (min) 500 SF NA

Parking Requirement (resident)

1 space / 1 bedroom;

2 spaces / 2 - 3 bedrooms

NA

Parking Requirement (guest) 1 space / 5 units NA

Minimum Building Setbacks

Building Separation 20’ 10’

Building Separation Where Parallel Walls Overlap 50’ or More 30’ 25’

From Arterial ROW 30’ 25’

From Collector ROW (Porch & steps may encroach 5’.) 15’ 25’

From Local ROW (Porch & steps may encroach 5’.) 10’ 15’

From Property Line or Open Space Not Adjacent to Public ROW 10’ 15’

From Property Line Adjacent to SFD 20’ 15’

From Property Line Adjacent to Non-Residential Use 20’ 15’

2.7 Multifamily Standards

A. Multifamily Lot Standards and Setbacks

See Landscape Section 7.0 for landscape requirements within setback areas.

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B. Multifamily Design Standards - Multifamily product types include both apartment buildings and condominiums.

1. BUILDING MASSING AND FORM

a. All multifamily buildings shall be arranged to address street frontages, internal drives, or open space amenities to provide good pedestrian connectivity and vehicular circulation through the site.

b. Building massing and form shall be designed to promote a pedestrian scaled environment. The objective of the multifamily arrangement and relationship to the street is to promote pedestrian activity along primary streets, reinforce community, and create a timeless aesthetic.

c. Building entries shall be accessed from the primary street or open space amenities and shall be on a raised stoop with a minimum height of 12” for an urban character. No wood steps or decking is permitted along the primary street, unless necessary to create an accessible entrance.

d. Porches, patios, and entryways shall be setback a maximum of 20’ from local and collector streets to promote pedestrian activity.

2. SITE DESIGN REQUIREMENTS

a. Urban like environments rely on sustainable materials, such as brick, concrete, and stone. Additionally, the use of stucco and cementitious siding allow for interesting color schemes along the facades. See Architecture Standards, Section 6.0 for more information.

b. Air conditioning compressors are permitted to be located at grade along the street frontage and internal drives when screened with a wall or landscape materials per the Landscape Standards, Section 7.0.

c. If feasible, transformers must be screened with landscape materials to buffer the unit from the street per the Landscape Standards, Section 7.0.

3. GARAGES AND PARKING

a. Required resident parking must be provided off public streets. Guest parking may be accommodated on local streets where supply is sufficient.

b. Garages, carports, and parking lots shall not be oriented towards public streets, where possible, and should be accessed from private drives. Parking lots shall not occupy more than 30% of each perimeter public street frontage.

c. Garages integrated into multifamily buildings are preferred over detached garages. Garage doors shall be recessed a minimum of 2’ from the primary building facade.

d. Detached garages shall not front the primary street and shall not exceed 12 garage doors in a row.

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Was

hing

ton

Stre

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Key Map

Conceptual Site Design Conceptual Architecture

Multifamily

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B

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3.0Main Street Commercial Planned

Development Standards

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3.1 Main Street Commercial Planned Development StandardsA. The following Main Street Commercial Planned Development Standards encourage a pedestrian oriented streetscape

with buildings adjacent to sidewalks, outdoor patios, and lively and visually interesting public spaces. Standards not mentioned here shall defer to the City Code.

1. MINIMUM AND MAXIMUM SETBACKS

a. To promote pedestrian friendly streets by bringing buildings close to the sidewalk, ground floors adjacent to collector and local streets shall adhere to a front building line along a 0’ “build-to line,” i.e. the property line. However, to accommodate active outdoor spaces like restaurant patios, the ground floor may be setback a maximum of 15’ from the property line.

b. The build-to line requirements shall apply to only the lower 30’ or first two stories, whichever is less, of a building, and higher portions of buildings shall be stepped back 15’ from the property line.

c. The build-to line requirement shall apply only to the primary street.

d. Any area between the front property line and the front building wall may be used for any combination of restaurant seating, outdoor seating, outdoor sales and displays, building wall, decorative/screening wall or fence no higher than three feet, landscaped entryway, pedestrian amenities such as a public plaza or park, or breaks for necessary pedestrian and vehicle access ways.

2. PARKING

a. Off-street parking shall not be permitted in front of buildings, but shall be located to the rear and sides of buildings.

b. On-street parking may be credited toward the parking requirements of the ground-floor use directly adjacent to the on-street parking spaces.

c. The perimeter and interior of all surface parking lots along a street, plaza, or other open area or right-of-way, shall be screened and landscaped, especially adjacent to pedestrian areas.

d. Curb cuts shall be minimized through the use of shared drives and alley access in order to reduce the number of pedestrian/vehicular encounters and conflicts.

e. Surface parking shall not exceed 125% of the minimum parking requirement.

f. Shared parking for uses with different peak parking demand will be considered and must be justified with future CSP / DP.

g. Parking structures shall be designed in accordance with the TOD District regulations in the City Code.

Main Street Commercial Standards MSC

Maximum Floor Area Ratio 2.0

Minimum Lot Size No minimum

Maximum Building Height 40’

Building Setbacks

Min. / Max. from Property Line along Arterial ROW 15’ / 25’

Min. / Max. from Property Line along Collector / Local ROW 0’ / 15’

Parking Setbacks

Minimum from Side or Rear Property Line 5’

4.0Commercial Planned

Development Standards

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4.1 Commercial Planned Development StandardsA. The Commercial Planned Development Standards shall defer to the Thornton Development Code, Article V, Division 2,

Part 3 - Commercial Design Standards for Projects of Five Acres and Larger. The Code in effect at the time these Planned Development Standards were approved shall apply.

B. The following setbacks are an exception to the Code.

Setbacks Building Parking

Arterial and Collector Streets 25’ 10’

Local Streets 25’ 10’

Internal Access Drives 20’ 0’

Interior Property within the Commercial Development 0’ 0’

Property line adjacent to Nonresidential Property 0’ 0’

Property line adjacent to Residential or Public Property 20’ 10’

5.0Industrial Planned Development

Standards

26

4.1 Industrial Planned Development StandardsA. These Industrial Planned Development Standards apply to the Industrial 1 and Industrial 2 zones. Standards not

mentioned here, such as lot size and building height, shall defer to the City Code.

1. GENERAL STANDARDS

a. All buildings and parking shall be set back from perimeter and interior streets a sufficient distance to create a distinct landscape zone between buildings, parking, and adjacent roadways, as defined in the chart below. Setbacks shall be landscaped in accordance with the Landscape Standards, Section 7.0.

2. PARKING

a. Parking lots shall be screened from view from adjacent residential, park, and open space uses in accordance with the Landscape Standards, Section 7.0.

Industrial Standards I1 / I2

Minimum Building Setbacks

Front, Side or Rear Yards from E-470 40’

Front, Side or Rear Yards from Arterial ROW 40’

Front and Side Yard from Collector/Local ROW 30’

Side or Rear Yard Interior (abutting a similar zone) 10’

Side or Rear Yard Interior (abutting a residential zone or public open space) 25’

Parking Setbacks

E-470 25’

Arterial ROW 25’

Collector/Local ROW 25’

Residential zone or public open space 30’

6.0Architecture Planned Development

Standards

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6.1 General Architecture Standards

The intent of these Architecture Standards is to provide a recognizable style of high-quality, architectural character in each Planning Area. Any standards not covered below shall be determined per Code requirements.

6.2 Residential Architecture Palette

B. Single-Family Detached Standards

1. SIGNIFICANTLY DIFFERENT ELEVATIONS

a. Housing facades shall not be repeated more than once every six lots in a row.

b. Dwellings placed adjacent to or across the street (sharing any street frontage) from other dwellings shall have significantly different front elevations. Front elevations will be considered “significantly different” from one another if at least 4 of the following design conditions are met:

• Greater than 50% of the front elevation cladding is of a different material.

• The locations and proportions of porches and /or other similar projecting design elements must vary substantially.

• The garage loading configuration is significantly different (i.e. side vs. front load).

• The overall architectural styles differ (i.e. Craftsman vs. Spanish style).

• A variation of building types: ranch, two-story and split-level.

• Use of roof dormers.

• Window shapes that are substantially different.

2. MASONRY REQUIREMENTS AND ARCHITECTURAL FEATURES

a. Each single family detached home is required to provide a minimum number of architectural features. The number of required features is determined by the percentage of masonry provided on the front and partial side elevations. Masonry includes brick, stone, or stucco. Each builder must identify the proposed features at time of architecture review. The following chart determines the number of features required based on the percentage of masonry. Each builder shall select at least one menu item from each category (roof, doors, etc.).

Required Number of Architectural Features Per Home

in Relation to Percentage of Masonry

Net Facade Area % of Masonry Required Number of Architectural Features

30% or more 7

25% - <30% 8

20% - <25% 9

15% - <20% 10

10% - <15% 11

0% - <10% 12

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b. Menu of Architectural Features

Garages and Driveways

• Garage door or doors with at least 4 SF of windows.

• Minimum 8 SF of windows in the garage - not on the door.

• A home design where garage doors do not appear on the front elevation.

Windows and Doors

• At least one full-height two story bay window (box or other) on the front elevation.

• Identifiable window mullion patterns on at least 75% of all windows.

• At least one roof window dormer on a street-facing elevation.

• At least two special, oversized decorative window heads or window sills on street-facing elevations.

• At least two clerestory windows, or windows with transoms above the main window on the front elevation.

• Front door with at least one sidelight.

• Front door with a transom window.

• Front door with a window.

• Ribbon windows consisting of two or more horizontal rows of windows containing a minimum of three windows each on the front elevation.

• Decorative shutters on at least 3 street facing windows.

Porches, Patios, Balconies

• Covered front porch wrapping around the side of a home a minimum of 8’ back with a minimum porch depth of 5’.

• Covered front or side porch with a minimum depth of 5‘, and a minimum floor area of at least 60 SF, excluding a 3’x3’ stoop, but including railings and columns.

• Rear or side deck of at least 100 SF.

• Covered walkout rear porch including minimum 12” square columns with a minimum 3’ masonry base. Siding clad columns do not qualify for this feature.

• Covered front or side porch at least 5’x8’ with at least two columns of a minimum cross section of 8”. Column dimensions will not be counted towards meeting the 40 SF minimum front porch size.

• Second story front or side balcony of at least 25 SF.

• Use of metal, wrought iron style porch or balcony railings.

Home Design

• At least 20 LF and a maximum of 4’ tall of masonry privacy walls (in lieu of fence) matching masonry of home on the subject property on front yard of homes.

• One or more real or simulated chimneys clad in brick or stone.

• In addition to masonry otherwise required, continuous minimum three foot high masonry base on all sides of the building. Must match masonry height at corners for a minimum of 2’ before returning to three foot base (i.e., if 6’ high on front, facade must include 2’ of 6’ high masonry at corner).

• Authentic architectural style such as Craftsman, Spanish Style, etc. as found in an architectural guidebook approved by the Planning Director (must be provided in the architectural review process).

• At least 100 SF of patterned paving on the subject property.

• Low-maintenance materials, such as masonry and cementitious siding, approved by the Planning Director on at least 90% of the total net facade area (must be provided in the architectural review process).

• Certification as Energy Star® rated home (must be provided in the architectural review process).

• Registration as a Built Green home by Built Green Colorado™ (must be provided in the architectural review process).

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Roofs

• Clay or concrete tile roof.

• At least a 16” roof overhang on the front elevation plus a side or rear elevation with decorative brackets, beams, or exposed rafter ends.

• Decorative material treatment, such as trim, beams, louvers, on at least one gable end facing a street.

• Parapet roof with a rooftop patio of at least 100 SF.

3. STAGGERED GARAGE SETBACKS

a. No two street-loaded single-family detached dwellings adjacent to one another shall have the same front garage setback. Adjacent setbacks shall vary by a minimum of 2’ or more. Adjacent homes located on cul-de-sacs, eyebrows, or streets with a curve radius less than 300’ shall not be subject to this requirement.

4. COLORS AND MATERIALS

a. Materials and colors shall unify an area through the use of a clearly defined palette. Colors and materials shall be selected for compatibility with the site, as well as compatibility with neighboring developments in the area.

b. Material diversity is required. Unless a home is 100% masonry (including stucco) a minimum of two different materials shall be incorporated in each model. Allowed materials include:

• Concrete stucco or synthetic stucco

• Brick or thinset brick

• Stone or synthetic stone

• Cementitious siding

• Vinyl siding

• Wood siding

• Metal

c. The coverage of the second material does not need to be distributed evenly on all four sides of the home.

d. Material and color changes are not permitted at outside corners and must include a 2’ minimum wrap.

e. Colors for the roof, body, windows, doors, and trim must be approved by the Planning Director at time of architectural review for specific products and neighborhoods.

5. ROOFS

a. Architectural dimensional composite shingles with a minimum 30-year warranty, slate, and tile roofs are allowed.

b. A minimum of 3 roof colors must be offered for each Planning Area greater than 50 homes.

c. Roof lines shall vary between buildings in order to avoid repetitive design and to create diversity within the neighborhood. For pitched roofs, the minimum rise to run is 4 to 12.

6. WINDOWS AND DOORS

a. Windows and doors shall match the architectural style of each home.

b. Window design must be consistent with the style of the house and carried out on all four sides of any house adjacent to an arterial, collector, open space corridor, perimeter boundary, commercial, or office parcel (i.e. divided light windows may be provided on a Victorian style home but not on a more contemporary style home). A minimum total window area of 12 SF of glass is required per elevation.

c. Where front porches aren’t provided, the design of the door shall be visually prominent.

7. DECKS AND COLUMNS

a. Decks and columns shall be consistent and complimentary to the main structure in materials and style. All porch and deck columns greater than 8’ above grade shall have minimum cross sections of 16”x16”.

8. ARCHITECTURAL ACCENTS

a. Decorative louvers, vents, color bands, trim and/or other accents shall be incorporated to provide interest on all sides of the building elevations. These accents must be incorporated on all sides of a house adjacent to an arterial, collector, open space corridor, perimeter boundary, commercial, or office parcel.

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b. Door and window trim shall be used when it is appropriate with the style of the building architecture. Each door shall have a minimum of nominal 4” wide wood trim. Window trim shall be a minimum of 1”x4” on sides; 2”x6” on heads; and 2”x8” or 2”x10” as horizontal accents when appropriate for building architecture. Trim is not appropriate when it will conflict with the materials and/or style of the building architecture (i.e. when stucco or stone is used). If trim is not used to frame windows and doors then a frame that matches the architectural style of the home shall be applied. This must be provided during the architectural review process.

c. On side entry garages, at least 25% of the garage wall facing the street shall be clad in brick, stone, or stucco and have at least one window or facade recess or projection of at least 12” in depth.

d. Exposed foundations that extend above grade more than 22” shall be covered with a material that is already approved for the home.

C. Single-Family Attached (Duplex and Townhome) Standards

1. BUILDING FORM

a. Facade articulation and architectural elements such as building breaks, changes in wall planes, gables, balconies, and varied architectural treatment shall be used to avoid long monotonous walls.

b. All buildings shall be designed to provide complex massing configurations with a variety of wall and roof planes. Unbroken wall and roof planes of 60’ or more are not allowed.

2. MASONRY REQUIREMENTS AND ARCHITECTURAL FEATURES

a. Each single family attached home is required to provide a minimum number of architectural features. The number of required features is determined by the percentage of masonry provided on the front and partial side elevations. Masonry includes brick, stone, or stucco. Each builder must identify the proposed features at time of architecture review. The following chart determines the number of features required based on the percentage of masonry. Each builder shall select at least one menu item from each category (roof, doors, etc.).

b. Menu of Architectural Features

Garages and Driveways

• A garage door with 2 SF of windows.

• At least 100 SF of patterned paving materials used in driveways or walks open to public view.

Windows and Doors

• A front door containing at least one sidelight or one transom over the front door.

• A front door with windows.

• Transom windows on at least 50% of the windows facing public or private streets.

• At least one large picture window (minimum size 6’by 6’) or bay window.

• Decorative shutters on at least two windows.

Porches, Patios, Balconies

• Each individual duplex or townhome unit shall provide private outdoor porches, patios or balconies totaling at least a minimum, usable floor area of 100 SF, excluding the stoop area and area for equipment such as air conditioning units, if required. Rooftop patios count toward this minimum.

Required Number of Architectural Features Per Home

in Relation to Percentage of Masonry

Net Facade Area % of Masonry Required Number of Architectural Features

30% or more 5

20% - <30% 6

10% - <20% 7

0% - <10% 8

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Home Design

• A front elevation with 100% of the first floor clad in stone or brick.

• A real or simulated chimney appearing on an exterior wall, faced with masonry or stucco.

• A unit located in an attached townhouse row or attached cluster containing no more than 6 units.

• Certification as an Energy Star®, Built Green, or LEED rated home (must be provided in the architectural review process).

Roofs

• At least one roof dormer containing a window.

• A main roof clad in clay, slate or concrete tile.

• A parapet roof with a rooftop patio.

3. STAGGERED HOUSE SETBACKS

a. Variations and staggering of facade planes by at least 2’ are required. Staggering of facade planes can help to differentiate between individual units.

4. ROOFS

a. Architectural dimensional composite shingles with a minimum 30-year warranty, slate, and tile roofs are allowed.

b. A minimum of 3 roof colors must be offered for each Planning Area greater than 50 homes. A minimum of 2 roof colors must be offered for each Planning Area less than 50 homes. Developments using tile roofs exclusively are exempt from having to offer a variety of tile colors.

c. SFA buildings with parapet roofs shall be designed to create visual interest by using variations in parapet height in various areas. Roof material and parapet height will be determined at Development Permit.

d. If a pitched roof is used, the minimum roof pitch, rise to run is 4/12. Roof lines shall vary between buildings in order to avoid repetitive design and to create diversity within the neighborhood.

5. COLORS AND MATERIALS

a. Materials and colors can unify an area through the use of a clearly defined palette. Colors and materials can be selected for compatibility with the site, as well as compatibility with the neighboring developments in the area.

b. Material diversity is required. Unless a duplex or townhome is 100% masonry (including stucco) a minimum of two different materials shall be incorporated in each model. Allowed materials include:

• Stucco or synthetic stucco

• Brick or thinset brick

• Stone or synthetic stone

• Cementitious siding

• Variations of applications of the same material, such as stone banding, will be counted as different materials for this requirement. These may be the same color or different colors depending on the style of the home.

c. For a material to be counted as one of the two materials required it must provide a minimum coverage of 30% of the net area of all sides of the building. The coverage does not need to be distributed evenly on all four sides.

d. Material and color changes are not permitted at outside corners. Two-foot masonry wraps are required.

e. Colors for the roof, body, windows, doors, and trim must be approved at time of Development Permit for specific products.

6. WINDOWS AND DOORS

a. The front elevation shall contain at least 15 SF of windows.

b. Doors should vary in style and match the architecture of each duplex and townhome. Entry sidelights are encouraged.

c. Window design must be consistent with the style of the building, except picture windows, and carried out on all four sides of any house adjacent to an arterial, collector, open space corridor, perimeter boundary, commercial, or office parcel (i.e. divided light windows may be provided on a Victorian style home but not on a more contemporary style home).

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7. DECKS AND COLUMNS

a. Decks and columns shall be consistent and complimentary to the main structure in materials and style. All porch and deck columns greater than 8’ above grade shall have minimum cross sections of 16”x16”.

8. ARCHITECTURAL ACCENTS

a. Decorative louvers, vents, color bands, trim and/or other accents shall be incorporated in order to provide interest on all sides of the building elevations. These accents must be incorporated on all sides of a house adjacent to an arterial, collector, open space corridor, perimeter boundary, commercial, or office parcel.

b. Door and window trim shall be used when it is appropriate with the style of the building architecture. Each door shall have a minimum of nominal 4” wide wood trim. Window trim shall be a minimum of 1”x4” on sides; 2”x6” on tops and bottoms; and 2”x8” or 2”x10” as horizontal accents when appropriate for building architecture. Trim is not appropriate when it will conflict with the materials and/or style of the building architecture (i.e. when stucco or stone is used). If trim is not used to frame windows and doors then a frame that matches the architectural style of the home should be applied. This must be provided during the architectural review process.

D. Multifamily Architectural Standards

1. BUILDING FORM

a. All sides of a multifamily building shall display a similar level of quality and architectural detailing. Building details, including roof forms, windows, doors, trim, and siding materials, shall reflect the architectural style of the building.

b. Facade articulation and architectural elements such as building breaks, changes in wall planes, gables, balconies, and varied architectural treatment shall be used to avoid long monotonous walls.

c. All building elevations shall be designed to provide complex massing configurations with a variety of wall and roof planes. Unbroken wall and roof planes of 50’ or more are not allowed.

d. Stairways shall not be located outside of the building envelope.

2. ARCHITECTURAL ELEMENTS

a. All multifamily building facades shall incorporate at least two of the following design elements:

• Textured and/or patterned surfaces

• Projections and recesses of at least 2’ in exterior wall planes

• Variations in color and/or materials

• Variations in roof forms / parapet heights

• Balconies

3. MASONRY REQUIREMENTS

a. Each multifamily building is required to provide a minimum amount of masonry on the elevation per the City’s Code in effect at the time of development. Each builder must identify the proposed materials at time of architecture review.

4. COLORS AND MATERIALS

a. Materials and colors can unify an area through the use of a clearly defined palette. Colors and materials can be selected for compatibility with the site, as well as compatibility with developments in the neighboring area. Material diversity is required. Unless a multifamily building is 100% masonry (including stucco) a minimum of two different materials shall be incorporated. Allowed materials include:

• Stucco or synthetic stucco

• Brick or thinset brick

• Stone or synthetic stone

• Cementicious siding

• Integrally colored, split faced, architectural Concrete Masonry Units

• Lap siding combined with at least 30% brick or stone

• Other materials as approved in the specific ODP/CSP for the multifamily product

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AS ACCENT MATERIALS ONLY:

• Metal

• Architectural Tile

• Wood

b. For a material to be counted as one of the two materials required it must provide a minimum coverage of 30% of the net area of all sides of the building. The coverage does not need to be distributed evenly on all four sides.

c. Material and color changes are not permitted at outside corners. Two-foot wraps are required.

d. Colors for the roof, body, windows, doors, and trim must be approved with future CSP/DPs for specific products or neighborhoods.

5. ROOFS

a. Architectural dimensional composite shingles with a minimum 30-year warranty, slate, and tile are allowed for pitched roofs.

b. For pitched roofs the minimum rise to run is 4/12.

c. Roof overhangs shall be a minimum of 12”.

d. Parapet roofs are allowed on multifamily buildings. Buildings with parapet roofs shall be designed to create visual interest by using variations in parapet height in various areas. Roof material and parapet height will be approved with future CSP/DP.

6. WINDOWS AND ENTRYWAYS

a. The entrance to the building and/or unit should be clearly defined and pedestrian in scale. Landscape areas shall be oriented and focused on the entrance to the building. Front porches are encouraged and may encroach 5’ into minimum building setbacks, according to Section 2.7 Multifamily Standards.

b. Window design must be consistent with the architectural style of the building and carried out on all four sides.

7. ARCHITECTURAL ACCENTS

a. Decorative louvers, vents, color bands, trim and other accents shall be incorporated at appropriate locations in order to provide interest on all sides of the building elevation. These accents must be incorporated as appropriate on all sides of a building.

b. Trim shall be used when it is appropriate with the style of the building architecture. It shall be minimum of 1”x4” on sides of windows; 2”x6” on window heads; and 2”x8” or 2”x10” as horizontal accents when appropriate for building architecture. Trim is not required when it will conflict with the materials and/or style of the building architecture (i.e. when stucco or stone is used). If trim is not used to frame windows and doors then a frame that matches the architectural style of the home should be applied. This must be provided during the architectural review process.

8. QUALITY ENHANCEMENT STANDARDS

a. Each multifamily building is required to provide a minimum of 5 of the following features. Each builder must identify the proposed features at time of architecture review.

• The average rentable (or saleable) living area of all units in the building is at least 900 SF.

• The total wall area of exterior walls of the building, excluding windows and doors, is at least 50% brick or at least 25% brick in combination with stone or stucco.

• The building’s main roof is clad with clay or concrete tiles.

• The building’s main roof is pitched with at least five distinct ridgelines, at least two of which are at least two feet apart in height, and two of which are at right angles to the others.

• The building’s main roof is pitched with at least a 6:12 slope.

• At least two ends of the building step down one story or more in height.

• All building elevations contain at least three distinct wall planes separated from each other by at least two feet.

• At least 50% of the units in the building have an outdoor balcony of at least 40 SF in size.

• At least 25% of the units are provided with an attached one-car or larger enclosed garage.

• All rain downspouts are enclosed within the walls of the building.

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• 35% of all the parking spaces shall be enclosed garages.

• Landscaping along arterial and collector streets shall be enhanced through the use of berms, larger trees than required by Code and additional numbers of bushes and other screening plants.

• Residential structures in the project are separated from all other structures by a minimum of 40’.

9. DETACHED GARAGES

a. Detached garages shall be designed using the same materials, colors, and architectural styles as the primary structure.

b. A minimum 20% of the garage elevation shall be masonry to match the primary structure if located along a street or open space.

c. Additional accent features may include decorative light fixtures between garage doors, roof breaks or hips, masonry details, decorative numbers above doors, and trim accent colors around garage doors.

d. Rear walls of detached garages over 40’ in length that back onto a street shall be articulated or punctuated through the use of two or more of the following:

e.

• Six or more window openings defined by frames, sills and lintels

• Three 100 SF trellis structures spaced along the rear wall, planted with an approved vine or creeping plant to cover the structure at maturity

• Change in wall plane of at least 2’ every 10’

• Vertical change in material or masonry pattern

• One roof dormer for each 10’ of length

6.3 Main Street Commercial Architecture Palette

A. The Main Street Commercial zone shall follow the Commercial Design Standards for Projects Under Five Acres as well as the North Washington Subarea design standards, with the following enhancements.

1. FACADE ARTICULATION

a. Recesses or projections shall be utilized no further apart than every 50’ on exterior walls of any single building with a footprint exceeding 10,000 SF to create multiple wall sections comparable to building mass of adjacent smaller buildings.

2. BUILDING ORIENTATION

a. Entrances of all structures shall front onto streets or face a pedestrian plaza.

b. Access from parking areas may be provided by lighted, mid-block passageways to the street.

c. Secondary entries may be placed at the rear of street-facing buildings.

3. TRANSPARENCY

a. Ground level façades that front toward streets shall have a minimum of 50% fenestration, with not more than 25% obscure glazing or translucent panels. Windows shall be a minimum of 5’ high and mounted not more than 3.5’ high above the interior floor level. Interior or exterior modifications, including temporary and permanent signage, window tinting, furnishings, fixtures, equipment, or stored items within 3’ of the windows may not reduce the effective transparency by more than 25%. Open display of individual merchandise is permitted.

6.4 Commercial Architecture Palette

A. The Commercial zone shall follow the Commercial Design Standards for Projects of Five Acres and Larger as well as the North Washington Subarea design standards.

6.5 Industrial Architecture PaletteA. Both Industrial zones shall follow the Design Standards for General Industrial Development Projects as defined by City

Code.

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Main Street Commercial Character Imagery

Commercial Character Imagery

Industrial Character Imagery

7.0Landscape Planned Development

Standards

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7.1 General Landscape StandardsA. The intent of these PD landscape standards is to provide the framework for an appealing visual aesthetic throughout City

Creek. These minimum requirements will ensure a uniform appearance for each parcel within the community.

7.2 Public Landscaped AreasA. Public landscape areas are defined in this section and shall include any landscaped area that is maintained by the City,

home owner’s association (HOA), or Metro District.

B. Drainages and Detention Areas

1. Drainages should be incorporated visually into City Creek through natural, native landscaping, open space fencing, and neighborhood trail connections.

2. Drainage and detention areas shall have a natural character and be landscaped at 1 tree equivalents (TE)/2500 SF minimum.

C. Trail Corridors

1. Trail corridors shall be incorporated into drainage areas, through the parks and open space system, and through landscape corridors provided within the community, connecting the various housing types. City Creek trails will connect to existing regional trails outside of the project boundaries to help link Thornton’s trail system.

2. Trail corridors shall be landscaped at 1 TE/450 SF or 1 TE/30 LF, whichever is greater.

3. There are two trail corridor types found in City Creek, regional and neighborhood that create pedestrian connections throughout the project.

a. Regional, multi-use trails are located within the Big Dry Creek and Mustang Run drainageways and south of E-470. Neighborhood connections are trail corridors that provide neighborhood access to parks, greenways, regional trails, and various housing types through the community.

D. Landscaped Areas

1. LANDSCAPE BUFFERS

a. The landscape buffer is the required landscape material that is to be provided within all setback areas, which are defined in the Planned Development Standards.

b. Setback/buffer widths are measured from the ROW or property line to building or lot.

2. COMMON LANDSCAPED AREAS

a. Common landscaped areas in residential development include all landscaped areas outside of private lots for SFD and SFA, and outside of multifamily buildings.

b. Common landscaped areas in commercial and industrial developments include all landscaped areas outside of buildings and shall have features such as public art, plazas or fountains. Common areas shall be based on a repetition of paving, site furnishing, and public art to provide visual connectivity throughout City Creek. Materials may vary between properties, but shall complement the overall visual themes. Additionally, the common areas shall be connected through pedestrian movement.

3. STREETSCAPE

a. All landscaping and fencing improvements within the City’s right-of-way must be reviewed and approved through the Development Permit process.

b. The developer shall provide 2 TE/50 LF along Washington Street and E. 152nd Avenue where adjacent to residences.

c. Landscaping adjacent to non-residential uses along Washington Street and E. 152nd Avenue shall meet Code.

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7.3 Retaining Wall RequirementsA. Where needed and appropriate, retaining walls of heights, material, and construction acceptable to Development

Engineering shall be provided by the builder / developer to keep slopes within acceptable ranges.

1. A minimum 4’ of separation is required between multiple retaining walls.

2. Retaining walls shall not exceed 4’ in height where feasible. Exceptions to the 4’ height may be submitted for approval at ODP/CSP.

B. Retaining walls over 30” in height shall include fencing or handrails at the top wall to prevent accidental falls.

C. Retaining walls shall be constructed of materials and colors to maintain consistency with adjacent architecture, signage, or the landscape theme.

7.4 Plant Material Requirements

A. One TE is equal to one tree, ten five gallon shrubs or grasses, or 20 one gallon grasses or qualifying perennials.

B. Minimum Sizes for All Plant Material:

1. Shade trees – 2.5” caliper, burlapped and bundled (B&B)

2. Ornamental trees – 2” caliper or 6’ tall clump, B&B

3. Evergreen trees – 6’ height minimum, B&B

4. All shrubs - five gallon container

5. Ornamental grasses - one gallon container

6. Ground cover, annuals, vines, and perennials - no restrictions, TE credit only for qualifying plant material in one gallon containers

C. Public Walks

1. Thorny plant material shall not be located adjacent to public walks. Clear space above public walks shall be 8’ or greater.

D. Seeded Area Regulations

1. In accordance with City of Thornton Standards and Specifications, Section 800: Landscape Improvements.

E. Non-Living Materials Regulations

1. No greater than 25% of the required landscape area shall be covered with mulch, rock, crusher fines, or other approved non-living materials. A minimum of 75% of the required landscape area shall be covered by living plant materials at maturity.

7.5 Irrigation Requirements

A. All development must comply with the City of Thornton Standards and Specifications, Section 809: Irrigation Systems. Where the City Creek design standards differ, the stricter requirement must be followed.

B. Irrigation Types

1. Permanent automatic irrigation is required for all landscaped areas that meets a minimum 70% distribution uniformity.

2. The use of quick-coupler systems for specific areas (i.e. areas with naturalized plantings) may be submitted for review with the Development Permit.

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7.6 Site Furnishings

A. General Requirements

1. Site furnishings should promote visually attractive, versatile, and coordinated environments by matching in color and style.

2. Site furnishings should include, but are not limited to, street lights and poles, pedestrian level lighting, bollards, benches, planters, railings, bus shelters, drinking fountains, and trash receptacles.

B. Location

1. Site furnishings shall be located in high use areas, such as near building entryways, drop-off areas, transit stops, pedestrian courtyards, and plazas.

2. Site furnishings shall be clustered together to reduce street clutter.

3. The placement of site furnishings shall ensure a clear, accessible path.

4. When placing benches consider areas that receive direct sunlight in the winter and shelter from winds. For summer months, consider placement in areas that are shaded.

5. Fixed seating shall provide a variety of arrangements.

6. Bike racks shall be placed in highly visible areas to discourage theft.

7.7 Residential Landscape Standards

A. Single-Family Detached

1. FRONT YARD LANDSCAPE REQUIREMENTS

a. Front yard landscaping and irrigation shall be installed by the builder and shall be maintained by the homeowner. The builder is required to provide front yard landscaping for all homes in single-family detached developments. Side yards shall be included where visible from the right-of-way (i.e. corner lots).

b. Front yard landscaping shall meet City Code. In order to assure quality landscaping and a harmonious but varied streetscape, landscape packages will be approved with future CSP/DP.

c. Each lot must have a private usable space. Minimum size and dimensions shall vary by SFD type and final layout will be approved with future CSP/DP.

B. Single-Family Attached Townhomes

1. FRONT YARD LANDSCAPE REQUIREMENTS

a. The builder is required to provide all landscaping and irrigation for all homes in single-family attached developments except private areas inside fences.

b. Front yard landscaping must be installed prior to issuance of certificate of occupancy. Landscape packages will be approved with future CSP/DP.

c. Each home must provide a private usable space. Minimum size and dimensions shall vary by SFA type and final layout will be approved at CSP/DP.

Site Furnishings Character Imagery

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C. Multifamily

1. Multifamily development shall be landscaped in accordance with Section 6.2 - 6.6 in addition to the standards per City Code.

7.8 Main Street Commercial Landscape Standards

Landscaping for the Main Street Commercial zone shall meet the requirements of Section 6.2 - 6.6 in addition to the standards per City Code.

7.9 Commercial Landscape Standards

Landscaping for the Commercial zone shall meet the requirements of Section 6.2 - 6.6 in addition to the standards per City Code.

7.10 Industrial Landscape Standards

In addition to City Code and the requirements above, landscaping for Industrial zones shall meet the following standards.

A. BUFFERS

1. Parking and outdoor storage areas shall include a landscape buffer at least 10’ wide between parking lots on abutting properties. Parking lots shall be buffered through the combined use of landscaping and berming where feasible. Natural planting patterns should be used, where feasible. Screen walls/fencing shall also be used on higher intensity sites where appropriate as visual barriers. Combinations of screen walls / fencing and landscaping shall minimize visual impacts of the built element while providing screening / buffering where needed.

2. Buffers between disparate land uses shall include berming to the extent feasible and a minimum of 1 TE/500 SF of area required to be landscaped. Screen walls may also be used where appropriate as visual buffers. These elements shall be implemented in concert with one another to mitigate any negative impacts neighboring uses may have on each other.

B. PARKING LOT ISLANDS

1. The minimum amount of parking lot islands may be reduced in exchange for larger landscaped areas in parking lots if the landscaped areas contain 10% more square footage than the required parking lot islands. These landscaped areas shall be located in a manner that reduces the visual impact of the parking lot, as determined by future CSP/DP.

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1.0Title

8.0Circulation Planned Development

Standards

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8.1 General StandardsA. All public improvements shall conform to the provisions in the most current City of Thornton Standards and Specifications

for the design and construction of public improvements at time of development except street standards included herein.

B. Roadways layouts depicted in the ODP/CSP are conceptual and subject to approval at time of future CSP for the development.

C. The location and characteristics of internal parcel circulation shall be determined with future CSPs, SUPs, and Development Permits, and shall follow the City Code. All areas of the development will be required to have two points of access. Access to arterials will be limited as much as possible.

D. Additional right-of-way dedications will be identified at future CSPs to accommodate for turn lanes, etc. not shown in the ODP/CSP.

8.2 Street Standards (Public and Private)

A. Local Streets

1. The majority of the transportation network shall be comprised of local streets, which shall have 5’ detached sidewalks and 5’ tree lawns.

B. Collector Streets

1. Collector streets shall be provided near intersections where local streets connect to arterials, as deemed necessary by future traffic studies. Collectors shall have 5’ detached sidewalks and 5’ tree lawns, as well as a turn lane.

C. Private Streets and Drives

1. Private street standards that vary from the street sections of the City Creek ODP/CSP and the City of Thornton code requirements may be proposed at the time of the ODP/CSP for that parcel.

2. The developer and/or builder is responsible for the coordination of the construction and pavement design with Development Engineering and Fire Department for private drives and alleys. Pavement designs shall be approved prior to paving.

3. Private drives shall be maintained by the HOA or Metro District.

4. Minimum fire access easement of 20’ for buildings under 30’, and 26’ for buildings over 30’ shall be provided.

5. Pavement shall be constructed according to a pavement design approved by Development Engineering based upon a geotechnical investigation.

6. Parking on private roads can be accommodated with on-street parallel parking, in driveways longer than 18’, or in parking pockets.

7. On-site circulation shall have an adequate length of stacking for industrial facilities, including loading docks, terminals, etc. that do not interfere with the movement of traffic (on or off-site) and/or pedestrian areas.

8. ALLEYS

a. Alleys shall have a minimum width of 15’.

b. Utility easements will be accommodated in a 15’ tract provided in the alley.

c. No curb and gutter is required on alleys.

8.3 Pedestrian and Bicyclist Circulation

Pedestrian routes in the development shall be integrated to provide a comprehensive circulation system offering convenient, safe and visually attractive accesses to all areas of the development. Routes shall provide pedestrian access from the perimeter of the site to all the buildings within the site in a consistent manner.

A. Sidewalks

1. Pedestrian circulation within City Creek will be accommodated primarily by detached sidewalks along roadways. By keeping the pedestrian walkways and the roadways within the same corridor, the activity level along the street is maximized.

2. Parking stalls shall not be allowed to overhang onto any sidewalk through the use of wheel stops.

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B. Bike Facilities

1. Multi-use trails accommodating pedestrians and cyclists shall be provided. Conceptual alignments are shown on the ODP/CSP.

2. Bike parking shall be provided in parks and plazas.

3. All nonresidential developments shall provide bicycle parking facilities at a ratio of at least one space for every 20 required automobile parking spaces.

4. Multifamily developments shall provide bicycle parking facilities at a ratio of one space for every five units.

C. Trails

1. Trail crossings at arterials will not be allowed at uncontrolled locations. The developer will align trails so that they cross at signalized intersections. Crosswalks shall be distinguished from surrounding pavement through the use of integrally colored and scored concrete.

2. Connections shall be required from the internal sidewalks of the residential subdivision to the sidewalks along arterial streets and neighborhood and regional trails.

3. In addition to the sidewalks and trails within roadway corridors, regional trails shall be provided within Mustang Run and Big Dry Creek. See the ODP/CSP Conceptual Park and Trail Plan on Sheet 7. Final trail layout will be determined at future CSP, DP and Civil CDs.

a. Regional Trails - Minimum width of 10’.

b. Neighborhood Trails - Minimum width of 6’ to encourage pedestrian circulation within the community. Final design to be determined at DP.

c. Neighborhood Trails that are used for both pedestrians and bicycles shall be 10’ wide. Final locations shall be determined on a future ODP/CSP.

8.4 Traffic Calming

The following traffic calming measures shall be incorporated into all aspects of the neo-traditional street system design, creating safe and efficient routes for vehicles, while improving pedestrian connections. These methods work best in combination and result in an effective system for motorists and pedestrians. Additionally, the implementation of traffic calming design will present opportunities for added aesthetic interest.

A. Traffic Calming Measures

1. Raised Pedestrian Crossings will be implemented at regional trail crossings and at major pedestrian crossings near school locations. The area where the sidewalk meets the street edge shall be marked with a tactile surface to warn visually impaired pedestrians that they are entering a hazardous area.

2. Curb Extensions shall be located along the eastern half of the commercial Main Street to improve visibility between motorists and pedestrians and eliminate parking near intersections. Curb extensions will allow for an increased landscape area between the sidewalk and road. This area shall be landscaped with vegetation over 8’ or under 30” in height. Additionally, curb extensions will reduce pedestrian crossing time, resulting in safer travel for pedestrians and motorists. The narrowed portion of the street shall maintain a minimum width of 20’.

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9.0Recreation Planned Development

Standards

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9.1 General Recreation Standards

The following intent statements describe the recreational opportunities within City Creek.

A. Plan and develop an interconnected parks and open space system through the use of parks, parkways, recreation facilities, and trail corridors that provides a diverse range of outdoor activities for residents and visitors to enjoy.

B. Provide focal points, such as public art, shade structures, and gardens, at the gateway to the Main Street Commercial zone from Washington Street and within the four POS zones shown on the ODP/CSP, as further described below.

C. Preserve the existing natural character of major drainages and wetlands on the site, including the Big Dry Creek, Mustang Run, and associated floodplains, which are a major asset to parks and open space.

D. Create opportunities for active recreation that add to the existing, nearby recreation facilities and the overall parks and open space system.

9.2 Role of the Metro District

The master plan and program for the parks and recreation system within City Creek will be established with the assistance of a Metro District or Homeowner’s Association. In this way, area recreation needs will be met while avoiding duplication with City services and thereby using resources in an efficient manner. Specific designs for all park areas will be required at the time of the Development Permit submittal for each of the Planning Areas.

9.3 Public Land Dedication (PLD)

A. The PLD for City Creek shall be satisfied as shown in this ODP/CSP submittal package. The following must be met in combination with the overall PLD package:

1. Commercial, industrial, and multifamily developments will satisfy their own PLD requirements.

2. All single family housing will get credit for the POS areas located near the Planning Areas.

3. PLD credit shall be given for permanent public art displays as approved by the City through the Development Permit process.

4. The dedication of the Big Dry Creek and Mustang Run floodplains shall count towards the PLD to help the City implement its park master planning efforts in this area.

B. Designated parks and open spaces (POS) within City Creek, as shown on the ODP/CSP, shall provide a variety of passive and active recreational opportunities throughout the community. Four distinct areas are described below.

1. POS 1: With approximately 8 acres, POS 1 encompasses Mustang Run north of 152nd Avenue. This area is intended to remain in a natural state and a trail is the only amenity that shall be provided.

2. POS 2: With approximately 6 acres, POS 2 encompasses Mustang Run north of 152nd Avenue. This area is intended to remain in a natural state and a trail is the only amenity that shall be provided.

3. POS 3: At approximately 2 acres, POS 3 provides City Creek neighborhoods with passive and active recreational opportunities. As the closest park space to the Main Street Commercial and denser home lots, this park shall provide the following amenities:

a. A terminating vista from the gateway off Washington Street by means of a vertical, public art piece or social gathering space, such as a gazebo, that draws people in and helps establish a unique sense of identity.

b. Seating

c. POS 3 shall also include at least one of the following features, if not already provided:

• Public art

• Gazebo / pavilion / shelter

• Amphitheater stage and seating

• Basketball court

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4. POS 4: At approximately 4.5 acres, POS 4 provides City Creek neighborhoods with active recreational opportunities. At a minimum, the following amenities shall be provided:

a. Seating and picnic tables

b. Open turf areas

c. Community gardens

d. Playground

e. Programmable multi-purpose field

5. POS 5: This 1-acre area is intended to provide a hard break between the PO4-2 and the Big Dry Creek floodplain, an area where urbanity and nature face off. A key feature of this area shall be a viewing deck where one can forget the homes behind them and focus on the nature in front of them. The following amenities shall be provided:

a. Seating

b. Long-distance viewing scopes

c. Interpretive signage

d. Trash receptacles

e. POS 5 shall also include at least two of the following:

• Special paving

• Decorative railings

• Shade structure

• Amphitheater

6. POS 6: This 36-acre open space area (not including detention ponds) shall provide a transition from the manicured parks to the west to the natural, Big Dry Creek floodplain on the east, with an emphasis on native vegetation and grasses. Wildlife habitat shall be respected while a multi-purpose trail shall be provided to connect City Creek to existing and planned regional trails. Areas within the floodplain that include recreational amenities shall be given credit for PLD as approved through the DP process. The following amenities shall be provided:

a. Regional, multi-use trail connection

b. Soft-surface trails

c. Seating within natural areas and along trails

d. Overlook area

e. POS 6 shall also include at least two of the following:

• Interpretive signage

• Trash receptacles (located in high use areas)

• Picnic table (located in high use areas)

• Exercise station

7. POS 7: At approximately 5 acres, POS 7 provides City Creek neighborhoods with active recreational opportunities. At a minimum, the following amenities shall be provided:

a. Seating and picnic tables

b. Open turf areas

c. Community gardens

d. Playground

e. Programmable multi-purpose field

C. Private Recreational Amenities For Multifamily Developments

1. All multifamily developments shall incorporate a minimum of two unique amenities per 350 units. Amenities shall meet City of Thornton design standards, per City Code Section 18-472, and may include, but are not limited to, a swimming pool, clubhouse, two tot lots, sport court, two picnic areas, dog park, or community garden. Amenities provided will count towards the multifamily public land dedication.

2. The amenity area shall be a focal point for each multifamily community.

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9.4 Design, Construction and Maintenance of Parks and Recreation AreasA. Dedicated floodplain areas will be maintained by the City of Thornton. All other areas will be maintained by an HOA and/

or Metro District. Metro District and HOA parks will be designed per PD and City of Thornton Standards and reviewed and inspected at construction for compliance with City Standards and Specifications.

9.5 Quality Enhancements For PD ZoningB. City Creek will exceed the City of Thornton’s requirement for subdivision quality enhancements, as defined in the

Development Code, by incorporating the following four items:

1. The subdivision provides sidewalks that are detached from the curb by at least 5’ and includes landscaped tree lawns along all street frontages within the subdivision.

2. At least 25% of single family detached - small lots and 50% of single family attached lots shall be alternately-loaded.

3. Open space located within the 100-year floodplain will be enhanced. Potential improvements include weed control, minimal restoration / seeding, a crusher fines path, wildlife viewing areas, picnic tables, and benches.

4. The subdivision dedicates excess land in the floodplain, above and beyond what’s required for public land dedication.

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FIGURE 8B: Public Art Character Imagery