A complete guide to home addition permits in Georgia (2026)

A home addition permit in Georgia is required for any structural change that adds square footage. All 159 Georgia counties require building permits for additions, with costs ranging from $325–$960 depending on project value and location. The permit process typically takes 2–4 weeks for plan review, plus inspections during construction.

Requirements vary by county

The biggest challenge is figuring out which office handles your permits. Fulton County (Atlanta, Sandy Springs, Roswell, Johns Creek) runs 2–3 weeks with strict energy-code enforcement. Gwinnett requires detailed structural drawings for additions over 400 sq ft. DeKalb offers $150 pre-application consultations and has environmental reviews near streams. Cobb enforces strict setbacks and zoning compliance letters. Hall County has lake-lot and wind-load rules; North Fulton (Milton) has stricter architectural guidelines in historic and equestrian districts.

When a permit is required

Almost always: room additions with structural changes, second stories, kitchen expansions that move plumbing/electrical, new bathrooms, garage conversions, sunroom/porch enclosures with foundations, and anything needing new foundation work. Usually not: interior work without moving walls, like-for-like window/door swaps, refinishing floors, painting, and replacing cabinets in an existing layout. When in doubt, call your local building department.

The 6-step process

1) Finalize architectural plans and engineering designs (stamped for structural elements). 2) Compile site plans/surveys, drawings, energy documentation, and the application. 3) Submit to the correct authority (most accept online). 4) Plan review and revisions, 2–4 weeks, up to 6 in holiday months. 5) Permit issuance and inspections (footing, foundation, framing, rough-in, insulation, final). 6) Final approval and Certificate of Occupancy, essential for insurance, refinancing, and resale.

What permits cost

Most counties calculate fees on construction value: Fulton $0.65, Gwinnett $0.75, Cobb $0.80 per $100. A $50,000 kitchen addition runs ~$325–$400; a $120,000 second story ~$780–$960. Budget for hidden costs too: surveys ($300–$800), engineering stamps ($500–$1,500), impact fees, and revision fees. Total permitting typically runs 1–3% of project cost. See home addition cost per square foot and types of home additions.

The risk of skipping permits

Georgia counties issue fines ($100–$500 per violation), stop-work orders, double permit fees, and, in extreme cases, forced demolition. Unpermitted additions also create financing, insurance, and resale problems. Permit fees are always cheaper than fixing unpermitted work later. Also factor in HOA approvals (30–60 days), setback variances, utility coordination (call Georgia 811), and noise ordinances.

Frequently asked questions

Can I start construction while my permit is under review?

No. Construction can’t begin until you have an approved permit in hand, starting early risks fines and stop-work orders.

What if my permit expires during construction?

Georgia permits expire after 6 months of inactivity. Apply for an extension ($50–$100) before it lapses, or obtain a new permit.

Should my contractor pull the permits or should I?

Either works, but contractor-pulled permits often process faster thanks to established relationships with building departments.