Accessory Structures in Roswell, GA: What Residents Actually Need to Know

If you live in Roswell or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Roswell has 3 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

Shed Rules

Roswell follows Georgia State Minimum Building Code provisions: residential storage sheds under 200 square feet generally do not require a building permit, but they must still meet UDC zoning setbacks and not be used as habitable space.

Key details: Permit Threshold: Over 200 sq ft, or with utilities. Setback: Typically 5-10 ft side/rear. Code: Ga. State Min. Building Code / Roswell UDC. Contact: Community Development (770) 641-3780.

Installing a shed in violation of setback or size rules is a UDC violation requiring removal or relocation. Code Enforcement issues notices first; Municipal Court citations follow if unresolved, with fines up to $1,000 per day.

ADU Rules

Roswell's Unified Development Code allows accessory dwelling units (ADUs) in limited residential zoning districts subject to size caps, owner-occupancy of the primary unit, and architectural-review standards. Garage conversions and second-floor apartments above garages are the most common forms.

Key details: Authority: Roswell UDC residential districts. Typical Size Cap: 25% of primary residence. Owner Occupancy: Generally required. STR Use: Prohibited - residential STR ban applies. Permit: Building permit + architectural review.

Constructing or renting an ADU in a non-permitted zone, or renting it as an STR, is a UDC violation enforced by Code Enforcement. Penalties include Municipal Court fines up to $1,000 per day and required reversion to a single-unit configuration.

Garage Conversions

Converting a garage to habitable space (bedroom, office, ADU) in Roswell requires a building permit, must meet residential energy code (insulation, windows, mechanical), and may require additional off-street parking to replace the converted spaces. ADU conversions are subject to the same UDC zoning rules as new ADUs.

Key details: Permit: Required. Egress: IRC §R310 required. Parking Replacement: Often required. Energy Code: Must meet residential standards. ADU Use: Subject to UDC ADU rules.

Unpermitted garage conversions are a Building Code violation citable in Municipal Court with fines up to $1,000 per day. The conversion may be ordered reversed if it lacks egress, ceiling height, or fire-separation. Real estate disclosure issues at resale are also common.

The Bottom Line

Roswell's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Roswell is broadly strict or permissive.

Keep in mind that Roswell can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.