Garage conversion rules in Washington, DC — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Garage conversions in DC require DOB building permits and must comply with 11 DCMR zoning regulations. Converting a garage to habitable space triggers building code requirements including fire sprinklers for new construction, egress, electrical, and plumbing upgrades.
Converting a garage to living space in DC requires a building permit from DOB and must comply with the DC Zoning Regulations (11 DCMR) and Building Code. The conversion triggers residential building code requirements including proper egress, electrical service upgrades, plumbing if applicable, insulation, and fire sprinklers for new residential construction. If the garage conversion eliminates required parking, the property must still meet any applicable zoning parking minimums for the zone. In many DC residential zones, parking requirements have been reduced or eliminated, making conversions more feasible. Historic district properties face additional review from the Historic Preservation Review Board. The converted space must meet minimum habitable room standards under the Housing Code.
Unpermitted garage conversions face stop-work orders, fines, and required restoration or code compliance at the owner's expense.
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See how Washington's garage conversions rules stack up against other locations.
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