Garage conversion rules in Alpharetta, GA — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Converting a garage to habitable space in Fulton County requires a building permit, plan review, electrical/plumbing/mechanical permits, and compliance with IRC habitable-space requirements. Off-street parking must be replaced.
Garage-to-living-space conversions trigger full IRC compliance: minimum ceiling height 7 ft, two means of egress, R-19 wall insulation in conditioned space, smoke and CO detectors, dedicated HVAC, and ground-fault outlets. Original off-street parking spaces lost to conversion must be replaced elsewhere on the lot per Zoning Article 18. If the conversion creates a separate dwelling unit, ADU rules apply (750 sq ft max, owner-occupancy). Atlanta further restricts garage conversions in historic districts.
Stop-work + double permit fees; required reversal to garage use; possible certificate-of-occupancy denial.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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