Garage conversion rules in Macomb County, MI — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Macomb County does not regulate garage conversions. Turning a garage into living space is a zoning and building matter handled by each city, village, or township, which reviews parking and setbacks, plus a locally issued building permit under the Michigan Residential Code.
Converting a garage into a bedroom, family room, or separate dwelling in Macomb County is controlled by local zoning and the statewide building code, not by a county ordinance. The Michigan Zoning Enabling Act gives each city, village, and township authority over land use, so the local ordinance decides whether a conversion is allowed and whether lost off-street parking must be replaced. Any conversion that creates habitable space is a change of use requiring a building permit from the local department, and the work must meet the Michigan Residential Code for insulation, egress windows, ceiling height, and smoke and carbon-monoxide alarms. If it creates a second independent dwelling, it is also treated as an ADU locally.
Converting a garage without a local permit, eliminating required off-street parking, or creating an unpermitted second dwelling can lead to code-enforcement citations, fines, denial of a certificate of occupancy, and orders to restore the garage or meet code.
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