Garage conversion rules in Kentwood, MI — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Converting a Michigan garage to habitable space requires building, electrical, plumbing, and mechanical permits under the statewide Michigan Residential Code regardless of locality.
Under the Stille-DeRossett-Hale Single State Construction Code Act, MCL 125.1501 et seq., converting a garage into habitable living space is a change of occupancy that requires full building permits and inspections statewide. The Michigan Residential Code mandates ceiling height (R305), light and ventilation (R303), emergency escape and rescue openings (R310), insulation per the Michigan Energy Code, smoke and carbon monoxide alarms (R314, R315), and proper heating capable of maintaining 68 degrees Fahrenheit. Slab-on-grade floors typically require insulation, vapor barriers, and floor elevation modifications. Local zoning controls whether the converted space remains attached parking or qualifies as living area, but the construction standards are uniform across all Michigan jurisdictions.
Unpermitted conversion may trigger stop-work orders, daily fines up to $500 under MCL 125.1523, and forced removal of nonconforming work.
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Side-by-side rule comparisons with other cities in Kent County.
See how Kentwood's garage conversions rules stack up against other locations.
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