ADU rules in San Ramon, CA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
ADUs allowed per CA Gov Code §65852.2 and San Ramon Zoning Ordinance §D4-39. One detached ADU and one JADU per single-family lot. Setbacks: 4 ft side/rear, 20 ft front for detached units. JADU up to 500 sq ft within existing home. Permit review: 6–12 weeks. Pre-approved plans available through Permit Ready ADU program.
San Ramon offers the Senate District 7 ADU Accelerator Program with rebates up to $7,500 for homeowners building ADUs. The Permit Ready ADU program provides pre-approved detached ADU plans. Properties with ADUs are ineligible for short-term rental registration. Contact San Ramon City Hall at (925) 973-2500 for current ordinance details and enforcement procedures specific to your situation.
Cities cannot deny conforming ADU applications. Unpermitted ADU construction: standard building code enforcement.
San Ramon, CA
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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 San Ramon's adu rules rules stack up against other locations.
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