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Accessory Dwelling Units
Introduction for: “Appraising Properties w/ADUs” December 16th, 2011
Presented by: Jordan Palmeri
Green Building Program Oregon Dept of Environmental Quality
palmeri.jordan@deq.state.or.us 503.229.6766
Overview
1. ADU basics
2. Incentives
3. Resources
Photo: City of Santa Cruz
Photo: City of Santa Cruz
What’s an ADU?
An accessory dwelling unit (ADU) is a second dwelling unit
on a single family residential lot. They’re also called granny flats,
mother-in-law suites, in-law suites, etc.
1. Conversion of existing space in a home 2. Addition to a home 3. Conversion or addition to a garage 4. A new separate building on the lot
Source: Oregon DEQ 4
Environmental benefits of smaller housing
Source: Oregon DEQ 5
Small is effective
Source: City of Milwaukie and URBSWORKS 6
Households are getting smaller
Source: City of Milwaukie and URBSWORKS 7
House size has increased
Source: Oregon AARP and US Census Bureau 8
More 65+ seniors
9
Economics of ADUs
City of Portland
10
Economics of ADUs
http://pdxadu.blogspot.com/
Homeowner class on ADUs
Jan 21st, 2012
Cities allowing ADUs (incomplete data)
Portland †
Eugene †
Gresham
Hillsboro †
Beaverton
Bend †
Medford †
Springfield
Corvallis †
Albany †
Tigard
Lake Oswego
McMinnville †
Oregon City †
Redmond
Tualatin
West Linn
Newberg
Milwaukie
Ashland
Wilsonville
Sherwood
Central Point
~ 50% of population
Source: Oregon DEQ
Portland: April 15, 2010 and June 30, 2013 Wilsonville: Permanent
System Development Charge (SDC) waivers
$ 7 – 12K savings
City of Portland permits
Energy Trust of Oregon Incentive
Source: http://pdxadu.blogspot.com/
Requirements for full “new home” incentives:
• ADU must have its own USPS mailing address separate from main residence
• ADU must receive an Energy Performance Score (full incentive available through EPS)
• ADU must receive its own third party verification
• ADU must be detached from the main residence
• ADU must be intended to be used as a residence
• Detached structure must be permitted as an ADU
• Builder or owner builder must be a trade ally with New Homes program
Energy Trust Incentive Requirements
Photo: Jordan Palmeri
Space-efficient housing Workgroup
• Oregon DEQ
• Oregon Dept Land Conservation & Development
• Metro
• City of Portland
• City of Eugene
• University of Oregon
• Orange Splot, LLC
• Cascadia Region Green Building Council
• Numerous space-efficient housing advocates
Drawing: cullygrove.org
Upcoming Events
http://cascadiagbc.org/living-future/12
Space-efficient housing tour
Space-efficient housing summit Late May…..
18
accessorydwellings.org
Thank you
Jordan Palmeri Oregon DEQ
503-229-6766
palmeri.jordan@deq.state.or.us
http://www.deq.state.or.us/lq/sw/wasteprevention/greenbuilding.htm
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