ADU rules in Richmond, CA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Richmond allows ADUs in all residential zones under RMC §15.04.610.020 and CA Gov Code §65852.2. Detached ADUs up to 1,200 sq ft, attached up to 50% of primary or 1,200 sq ft. JADUs up to 500 sq ft. Height limit 16 ft for detached. Ministerial approval (no public hearing). Pre-approved plans available free of charge.
ADUs are a permitted use in any district where residential uses are allowed. Approval is ministerial — no discretionary review or public hearing. Single-family lots may have one detached ADU plus one JADU. Multi-family properties may be eligible for multiple ADUs. Setbacks: 4 ft side/rear for new construction. Garage conversions do not require replacement parking. No parking required within half-mile of transit. ADUs under 750 sq ft are exempt from impact fees. Fire sprinklers not required if primary residence doesn't have them. The city offers pre-approved ADU plans free of charge. Permit timeline is typically 6-8 weeks.
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 Richmond's adu rules rules stack up against other locations.
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