Find ADU Regulations for Your City

Every California city allows ADUs by state law. Search your city to learn about local regulations, building requirements, and how to get started.

1125 Cities
100% Allow ADUs
1,200 Max Sq Ft

Sultan

WA
ADUs Allowed
Population 6,730
County Snohomish
View Regulations

Sumas

WA
ADUs Allowed
Population 1,810
County Whatcom
View Regulations

Sumner

WA
ADUs Allowed
Population 10,800
County Pierce
View Regulations

Sunnyside

WA
ADUs Allowed
Population 16,530
County Yakima
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Tacoma

WA
ADUs Allowed
Population 222,400
County Pierce
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Tekoa

WA
ADUs Allowed
Population 805
County Whitman
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Tenino

WA
ADUs Allowed
Population 2,045
County Thurston
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Tieton

WA
ADUs Allowed
Population 1,545
County Yakima
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Toledo

WA
ADUs Allowed
Population 695
County Lewis
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Tonasket

WA
ADUs Allowed
Population 1,085
County Okanogan
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Toppenish

WA
ADUs Allowed
Population 8,900
County Yakima
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Tukwila

WA
ADUs Allowed
Population 22,780
County King
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Tumwater

WA
ADUs Allowed
Population 27,100
County Thurston
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Twisp

WA
ADUs Allowed
Population 1,075
County Okanogan
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Union Gap

WA
ADUs Allowed
Population 6,660
County Yakima
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Uniontown

WA
ADUs Allowed
Population 400
County Whitman
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University Place

WA
ADUs Allowed
Population 35,580
County Pierce
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Vader

WA
ADUs Allowed
Population 650
County Lewis
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Vancouver

WA
ADUs Allowed
Population 199,600
County Clark
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Waitsburg

WA
ADUs Allowed
Population 1,185
County Walla Walla
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Walla Walla

WA
ADUs Allowed
Population 34,310
County Walla Walla
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Wapato

WA
ADUs Allowed
Population 4,620
County Yakima
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Warden

WA
ADUs Allowed
Population 2,625
County Grant
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Washougal

WA
ADUs Allowed
Population 17,490
County Clark
View Regulations

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