Chatham County, GA Accessory Structures: Garage Conversions (2026)
Garage conversion rules in Chatham County, GA, sometimes called garage-to-ADU or accessory living unit conversions, govern permits, ceiling height, egress, and parking replacement.
Key Facts
- Permit
- Required for conversion to living space
- Trigger
- Change of occupancy class
- Building standard
- Georgia adopted codes
- Zoning
- NewZO must allow added unit
- Reviewer
- County or city building office
Summary
Converting a Chatham County garage or other non-habitable space into living quarters requires a building permit. The county lists any change of occupancy class, and conversion of storage or non-habitable space to living quarters, as work that shall require permits.
Any work that changes the class of construction or occupancy class of the building; Conversion of basement or other below grade space, attic, storage or other non-habitable space to living quarters (such as bedrooms, kitchens, dining rooms, etc.)
Full Breakdown
In unincorporated Chatham County, turning a garage, basement, attic, or storage area into habitable space (a bedroom, in-law suite, or ADU) triggers a building permit. Chatham County Building Safety's published list requires a permit for any work that changes the occupancy class of a building and for conversion of below-grade, attic, storage, or other non-habitable space to living quarters. The new living space must meet Georgia's adopted building codes for room size, egress, light, ventilation, and smoke/CO alarms, and must satisfy NewZO zoning (whether the added unit is permitted, parking, and density). Inside a city, that municipality's building office reviews the conversion. An unpermitted conversion is hard to legalize, so apply before starting work.
Violations & Fines
An unpermitted garage or space conversion is a code-enforcement matter for Chatham County Building Safety or your city, which may issue a stop-work order, require a retroactive permit and inspections, levy fines, or order the space restored.
Frequently Asked Questions
Can I convert my garage to a bedroom in Chatham County?
Is a converted garage counted as an ADU?
Sources & Official References
Other rules in Chatham County
Compare Chatham County to another location·View the Georgia accessory structures overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.