Hamilton County handles building permits for unincorporated areas and several smaller municipalities, while the City of Chattanooga and other larger municipalities maintain their own independent building and zoning departments. Development in the county is subject to specific flood plain management regulations and steep slope development standards due to the local topography.
How this fits with the state
The state authority here is Tennessee Board for Licensing Contractors. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.