§ IL Illinois
County permits
LaSalle County
LaSalle County issues permits only for unincorporated areas. Inside an incorporated city? Pick the city below — its building department handles your permit.
§ 01 Unincorporated
Unincorporated LaSalle County.
If your property isn't inside an incorporated city, the county permit office handles your application directly.
- Permit authority
- LaSalle County Environmental Services and Land Use Department
- Website
- Permit authority website ↗
- Phone
- 815-434-8666
- Address
- 119 W. Madison St., Room 107, Ottawa, IL 61350
§ 02 Jurisdictions
Cities in LaSalle County
Click any city for its full permit guide — authority, fees, application steps, inspections, and exempt work.
§ 03 County navigation
Information last verified for LaSalle 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.