County permits

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 Zoning Officer / Mercer County Board of Commissioners
Website: No public online permit portal found for county building permits ↗
Online portal: No public online permit portal found for county building permits ↗
Phone: 660-748-3425
Email: mcclerk@grm.net
Address: 802 E Main St, Princeton, MO 64673 (county courthouse mailing/contact address)

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, Missouri. Permit rules and fees change frequently — verify current requirements with the issuing department before applying. Jaspector is an educational reference, not legal advice.