Garage conversion rules in Sutter County, CA — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Sutter County requires no additional setback for an existing garage converted to an ADU, and state law bars the County from requiring replacement parking when a garage is converted or demolished for an ADU.
Zoning Code Sections 1500-06-030(H)(4) and 1500-05-030(N)(4) provide that no additional setback is required for an existing garage converted to an accessory dwelling unit; an ADU built above a garage needs a 5-foot side and rear setback. Conversions of existing space within a residence or accessory structure cannot be required to install new or separate utility connections or pay connection fees (Section 1500-06-030(H)(14)). State law reinforces this: Gov. Code Section 66314(d)(7) requires no setback for converted existing structures, and Section 66314(d)(11) prohibits requiring replacement of off-street parking spaces lost when a garage, carport, or covered parking structure is demolished or converted for an ADU. Building permits are still required.
Converting a garage to living space without building permits violates Zoning Code Section 1500-26-030 and is punishable as a misdemeanor or infraction under Section 1500-26-060, with administrative penalties available under County Ordinance Code Chapter 87.
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