Garage conversion rules in Mohave County, AZ — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Converting a garage into living space in Mohave County is a change of occupancy needing a building permit under the 2018 IRC. Add a kitchen and separate entrance and it becomes an accessory residence under Ordinance 2025-06.
A garage-to-living-space conversion changes the occupancy from a private garage to habitable space, so Mohave County Development Services requires a building permit and plan review under the 2018 IRC. The new room must meet residential minimums: adequate ceiling height, an emergency egress window in any sleeping room, smoke and carbon-monoxide alarms, insulation, and structural verification of the slab and walls. Adding a bathroom or kitchenette brings separate plumbing and electrical permits. Insulation and cooling are critical here because uninsulated garages become dangerously hot in Mohave summers. When the conversion adds a kitchen and its own entrance, it counts as an accessory residence governed by county Ordinance 2025-06.
An unpermitted garage conversion is a code violation that can force after-the-fact permitting or restoration to a garage. Creating a second dwelling unit without accessory-residence approval adds zoning enforcement.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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