ADU rules in Oakley, CA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Oakley complies with California Gov Code §65852.2 (statewide ADU law). Single-family lots may have one ADU plus one JADU. Maximum ADU size: 1,200 sq ft; no minimum lot size restriction. Setbacks: 4 ft from side/rear property lines (new detached ADU). Minimum height: 16 ft. ADUs under 750 sq ft are exempt from impact fees. ADU permit applications processed in 60 days maximum.
California Government Code §65852.2 requires all cities to allow ADUs on single-family and multi-family residential lots. State law sets minimum standards that cities cannot restrict below: up to 800 sq ft for detached ADUs, 4-foot rear/side setbacks, no parking requirement within 1/2 mile of transit. Oakley may have additional local standards within state limits. Junior ADUs (JADUs) up to 500 sq ft within existing structure also allowed. No owner-occupancy requirement for ADUs (per recent state law). ADU permit processing limited to 60 days. Impact fees waived for ADUs under 750 sq ft.
Cities cannot deny conforming ADU applications. Unpermitted ADU construction: standard building code enforcement.
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Side-by-side rule comparisons with other cities in Contra Costa County.
See how other cities in Contra Costa County handle adu rules.
See how Oakley's adu rules rules stack up against other locations.
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