Garage conversion rules in Thousand Oaks, CA — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Garage conversions to ADUs are allowed under CA state law and TOMC Ord. 1732-NS. Existing setbacks are exempt for conversions. Replacement parking is not required when a garage is converted to an ADU. Interior garage parking spaces must remain for non-ADU structures.
Garage conversions in Thousand Oaks are primarily governed by California's JADU (Junior Accessory Dwelling Unit) law (Gov Code 65852.22). Converting a garage to a JADU (up to 500 sq ft) is allowed by right on single-family lots — the city must approve ministerially. JADUs require owner-occupancy of either the JADU or the primary dwelling. The conversion must include a cooking facility, bathroom, and separate entrance. Replacement parking is not required under state law for garage conversions to ADUs or JADUs. Building permits are required for all conversions.
Converting a garage without permits: building code violation with stop-work orders and double retroactive fees. Occupying an unpermitted conversion: zoning violation with fines of $100-$500/day and requirement to restore or obtain permits. Non-owner-occupied JADU: violation of JADU requirements. State law protects compliant conversions from city denial.
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Side-by-side rule comparisons with other cities in Ventura County.
See how other cities in Ventura County handle garage conversions.
See how Thousand Oaks's garage conversions rules stack up against other locations.
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