San Benito County, CA Accessory Structures: Garage Conversions (2026)
Garage conversion rules in San Benito County, CA, sometimes called garage-to-ADU or accessory living unit conversions, govern permits, ceiling height, egress, and parking replacement.
Key Facts
- Existing garages
- Convertible to ADU
- Minimum size rule
- None for conversions
- Extra parking required
- None for conversion
- Lost garage parking
- Not required to replace
Summary
Existing garages and other accessory structures in unincorporated San Benito County can be converted into an ADU under the standard ADU rules, and lost garage parking doesn't have to be replaced.
Height. 25 feet for new structures built specifically as an accessory dwelling unit. Existing structures can be converted to an accessory dwelling unit consistent with the requirements of this § 25.08.002. ... Parking lost when a garage, carport, or covered parking structure is demolished to allow for the construction of an accessory dwelling unit or for the conversion of a structure to an accessory dwelling unit shall not be required to be replaced.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2025 S-28: current through Ordinance 1078).
Full Breakdown
San Benito County's ADU ordinance expressly allows existing structures, including garages, to be converted into an accessory dwelling unit as long as the result meets the same development standards as new ADU construction (setbacks, design compatibility, and environmental health clearance for water and wastewater). Converting a garage into an ADU also carries a parking break: no additional off-street parking has to be provided for the conversion, and covered parking lost when the garage is demolished or repurposed does not need to be replaced elsewhere on the lot.
Violations & Fines
A garage conversion that skips the building permit or doesn't meet ADU design/setback standards is treated as unpermitted construction, subject to Title 1 code enforcement and a possible order to bring the structure into compliance.
Frequently Asked Questions
Can I convert my garage into an ADU in unincorporated San Benito County?
Do I have to replace the parking spot my garage used to provide?
Sources & Official References
Other rules in San Benito County
California rules heatmap·Compare San Benito County to another location·View the California accessory structures overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.