State directory

Pre-approved ADU plans in California

California ADU plans come from local city and county programs, not a single statewide catalog. Browse source-backed county plan catalog pages, context-only county pages, and city pre-approved ADU plan pages, then verify official sources before relying on a listing.

Statewide source context

Use California context, then verify local ADU plans.

State-level ADU resources can explain broad rules, but accepted pre-approved ADU plan catalogs are local. Use county plan catalog pages, context-only county pages, and city pages below to verify source-backed listings for each jurisdiction.

County plan catalogs

California ADU plan county context: Counties With Direct Accepted Plan Records

County context

Context Pages With City Links

These county pages currently have no direct county-level accepted plan records, but remain reachable because they connect to supported city program pages.

City programs

California ADU plan city programs

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Send an official city or county ADU source URL so it can be reviewed for a future data update.

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