Garage conversion rules in San Antonio, TX — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Garage conversions in San Antonio may create ADUs under UDC §35-371, subject to owner occupancy requirements. Building permits are required for all conversions. UDC parking standards must still be met — converting a garage may trigger parking deficiency issues.
Converting a garage to living space in San Antonio requires a building permit from DSD. If the conversion creates an independent dwelling unit, it becomes an ADU under UDC §35-371 with all associated requirements: owner occupancy, max 3 occupants, recorded covenant, matching architectural style. The garage conversion must not create a parking deficiency — UDC parking standards still apply, meaning the loss of garage parking may need to be offset by other on-site parking on approved surfaces. Electrical, plumbing, and mechanical work must comply with current building codes. Historic district properties require HDRC review. The conversion cannot exceed lot coverage limits for the zoning district.
Unpermitted conversion: stop-work order. Parking deficiency: Code Compliance citation. ADU without covenant: violation of UDC §35-371.
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Side-by-side rule comparisons with other cities in Bexar County.
See how other cities in Bexar County handle garage conversions.
See how San Antonio's garage conversions rules stack up against other locations.
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