PNW Zoning Rules · Updated 2026

ADU rules for 17 PNW cities

What you can actually build in each city — real code citations, ADU size limits, setback rules, and free property analysis for any Oregon or Washington address.

Portland, OR

800 SF or 75% of primary — SDC waiver through ~2028

Seattle, WA

1,000 SF DADU cap · HB 1110 stacked flats now legal

Tigard, OR

Stricter than Portland: lesser of 50% primary or 800 SF

Bend, OR

HB 2001 middle housing · high wildfire risk overlay

Vancouver, WA

WA HB 1337: 2 ADUs per lot, 1,000 SF each

Bellevue, WA

Puget Sound's hottest infill market

Kirkland, WA

WA HB 1337 + strong lakefront rent economics

Redmond, WA

Microsoft campus adjacent · sustained rent demand

Renton, WA

South King County value play + WA state floor

Shoreline, WA

Light-rail expansion boosting infill values

Kent, WA

Lowest land basis in King County ADU coverage

Auburn, WA

Affordability play · WA state ADU floor

Beaverton, OR

HB 2001 middle housing + Portland-metro exit prices

Hillsboro, OR

Tech-hub demand + Washington County lot availability

Gresham, OR

Lower land basis vs Portland — ADU + fourplex pencils

Salem, OR

Capital + Willamette Valley market · stable demand

Wenatchee, WA

Central WA rural market · wildfire exposure high

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