Mercer County

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

§ 01 Unincorporated

Unincorporated Mercer County.

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

Permit authority: Mercer County Regional Planning Commission / Zoning Inspector
Website: Permit authority website ↗
Phone: (419) 586-3178
Email: planningcommission@mercercountyohio.gov
Address: 220 W Livingston St, Celina, OH 45822

Full unincorporated Mercer County permit guide →

§ 02 Jurisdictions

Cities in Mercer County

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

§ 03 County navigation

Information last verified for Mercer County, Ohio. Permit rules and fees change frequently — verify current requirements with the issuing department before applying. Jaspector is an educational reference, not legal advice.