Do I need a permit for addition or structural alteration in Brunswick?

Yes. In Georgia, addition or structural alteration generally requires a permit, and Brunswick is no exception.

Additions and any change to load-bearing walls require a permit and reviewed plans in Georgia; removing or altering a bearing wall usually needs engineered details. Additions may trigger energy-code, zoning, and setback review, so confirm the full scope before starting. Glynn County's own permitting office is the Glynn County Building Permitting and Inspections office, reachable on 912-554-7456 at https://www.glynncounty.org/government/departments/building-permitting-inspections. It issues permits for the unincorporated county. If your city does not run its own building department, and many smaller Georgia municipalities do not, this is the office that will handle the job. An addition means a full plan review, so confirm submittal requirements and current review times before you commission drawings. Brunswick's Residential Project Review Checklist says plans will not be accepted without a recent plot survey with elevations and five bound sets of drawings, and unbound or one-page sets are refused. Email correspondence should copy drtreview@cityofbrunswick-ga.gov. Projects disturbing one acre or more, or within 200 feet of state waters and marshes, need an Erosion and Sediment Control Plan reviewed by the Georgia Soil and Water Conservation Commission, which has up to 35 days to review it. Under zoning Code section 23-25-2, a structure in a special flood hazard area must include elevation data certified by a registered land surveyor or licensed architect with the application. Under Ordinance 1084 Sec. 12-45, work may not proceed past each inspection stage without the inspector's written approval.