County permits

Cook County

Cook County issues permits only for unincorporated areas. Inside an incorporated city? Pick the city below — its building department handles your permit.

§ 01 Unincorporated

Unincorporated Cook County.

If your property isn't inside an incorporated city, the county permit office handles your application directly.

Permit authority: Department of Building and Zoning (BNZ)
Website: Permit authority website ↗
Phone: 312-603-0500
Email: info.bnz@cookcountyil.gov
Address: 69 W. Washington St., Suite 2830, Chicago, IL 60602

Full unincorporated Cook County permit guide →

§ 02 Jurisdictions

Cities in Cook County

Click any city for its full permit guide — authority, fees, application steps, inspections, and exempt work.

§ 03 County navigation

Information last verified for Cook 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.