§ IL Illinois
County permits
St. Clair County
St. Clair County issues permits only for unincorporated areas. Inside an incorporated city? Pick the city below — its building department handles your permit.
§ 01 Unincorporated
Unincorporated St. Clair County.
If your property isn't inside an incorporated city, the county permit office handles your application directly.
- Permit authority
- Building & Zoning Department
- Website
- County Zoning Forms ↗
- Online portal
- County Zoning Forms ↗
- Phone
- (618) 825-2528
- Address
- 10 Public Square, 5th Floor, Belleville, IL 62220
§ 02 Jurisdictions
Cities in St. Clair County
Click any city for its full permit guide — authority, fees, application steps, inspections, and exempt work.
§ 03 County navigation
Information last verified for St. Clair County, Illinois. Permit rules and fees change frequently — verify current requirements with the issuing department before applying. Jaspector is an educational reference, not legal advice.