California ADU Information

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.

1189 Cities

100% Allow ADUs

1,200 Max Sq Ft

Browse Cities

ADU Regulations by City

Select your city to view local ADU rules, zoning requirements, and building guidelines.

Reardan

Redmond

Renton

Republic

Richland

Ridgefield

Ritzville

Riverside

Rock Island

Rockford

Rosalia

Roslyn

Roy

Royal City

Ruston

Sammamish

SeaTac

Seattle

Sedro-Woolley

Selah

Sequim

Shelton

Shoreline

Skykomish

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