Chatham County handles permitting for unincorporated areas, while incorporated municipalities like Savannah, Pooler, and Tybee Island maintain their own independent building and zoning departments. Development in the county is heavily influenced by the Chatham County-Savannah Metropolitan Planning Commission and strict coastal flood zone regulations due to the proximity to the Atlantic Ocean and tidal rivers.
How this fits with the state
The state authority here is GA State Licensing Board. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.