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

If you live in Suwanee or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Suwanee has 5 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

Shed Rules

Sheds over 120 sq ft require a Suwanee building permit. All sheds must meet accessory structure setbacks (typically 5-10 ft from rear/side lines) and may not exceed height limits in the UDC.

Key details: Permit Threshold: Over 120 sq ft. Rear/Side Setback: ~5 ft residential. Front Yard: Not permitted. Max Height: ~15 ft or one story. Code Base: GA IRC + Suwanee UDC.

Unpermitted shed: removal order, fines up to $1,000/day, permit-after-the-fact fees.

ADU Rules

Georgia has no statewide ADU mandate. Suwanee UDC regulates accessory dwelling units via zoning; typically allowed only as attached family-care suites or with special use permit. MXD zones may allow more flexibility.

Key details: State Mandate: None in GA. R-100/R-75: Restricted. Family-Care: Often allowed. MXD Zones: More flexibility. Detached ADU: Usually SUP/rezoning.

Unpermitted dwelling unit: code enforcement, fines up to $1,000/day, removal order.

Carport Rules

Carports are permitted accessory structures in Suwanee but must meet setbacks and building permit requirements. Typically must be architecturally compatible with primary dwelling.

Key details: Permit: Required. Setbacks: Per UDC accessory. Compatibility: Material/roof match req. Metal Carports: May be restricted. HOAs: Often more restrictive.

Unpermitted carport: removal order, fines up to $1,000/day.

Garage Conversions

Garage conversions to living space require Suwanee building permit. Must meet residential code for ceiling height, egress, insulation, and electrical. Parking replacement required to maintain off-street parking minimums.

Key details: Permit: Required for conversion. Parking Replace: Maintain 2-space min. Ceiling: 7 ft min (IRC). Egress: Bedroom window required. Code: GA IRC habitable space.

Unpermitted conversion: code enforcement, fines up to $1,000/day, removal of improvements, red-tag until brought to code.

Tiny Homes

Tiny homes on foundations must meet full GA IRC requirements (including Appendix Q for homes under 400 sq ft). Tiny homes on wheels classified as RVs and cannot be used as permanent dwellings in Suwanee residential zones.

Key details: Foundation Tiny: IRC Appendix Q. THOW: Classified as RV. Min Dwelling Size: Check R-100/R-75 min. RV as Dwelling: Not permitted in res zones.

Illegal dwelling use: fines up to $1,000/day, removal order. Unpermitted structure: stop-work order.

This is not one of those rules that cities tend to ignore. Suwanee actively enforces its tiny homes requirements.

The Bottom Line

Suwanee'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 Suwanee is broadly strict or permissive.

This guide is based on Suwanee's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.