Garage conversion rules in Des Moines, IA — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Garage conversions to living space in Des Moines require building permits and must meet residential building code standards. Off-street parking requirements must still be satisfied after conversion.
Converting a garage to living space in Des Moines requires a building permit and compliance with the residential building code. The converted space must meet requirements for habitable rooms including ceiling height, natural light, ventilation, egress windows, insulation, electrical, and heating. The city's zoning code requires minimum off-street parking (typically 2 spaces per dwelling unit), so converting a garage may only be feasible if the property retains sufficient off-street parking. If the garage conversion creates a separate dwelling unit, it may be treated as an ADU with those applicable rules. Exterior modifications to the garage must comply with the building code and any historic district overlay requirements. A certificate of occupancy may be required before the converted space can be occupied.
Unpermitted conversion: municipal infraction. May be required to restore to garage or obtain retroactive permits. Occupancy without certificate is a violation.
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