Greenville County handles building permits for all unincorporated areas and several smaller municipalities that contract with the county. Larger incorporated cities, such as the City of Greenville, Greer, and Simpsonville, maintain their own independent building and zoning departments. Development in the county is subject to specific land development regulations and potential flood hazard area reviews.
How this fits with the state
The state authority here is South Carolina Contractor's Licensing Board; Residential Builders Commission. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.