County Building Permits

Columbia County Building Permit Guide

Building permit information for unincorporated Columbia County and all incorporated cities. Find your jurisdiction's permit authority, application process, fees, and requirements.

Washington Updated March 2026

Important: Columbia County issues building permits only for properties in unincorporated areas of the county. If your property is inside an incorporated city (Dayton or Starbuck), select your city below — your city's building authority handles permits in coordination with Columbia County.

Unincorporated Columbia County

Permit authority
Columbia County Planning and Building Department
Address
115 E. Main Street, Dayton, WA 99328
Inspections
(509) 382-3941

Jurisdictions in Columbia County

Select your jurisdiction for local permit authority, portal links, application steps, fees, and inspection requirements.

Dayton Permit guide → Starbuck Permit guide → Unincorporated Area Permit guide →

Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the relevant city or county department before applying.

Related Washington Resources

License Requirements Verify your contractor's L&I registration → Contract Template Free homeowner-contractor agreement →

Need help with your project?

Navigating permits in Columbia County can be complicated.

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Important: This page is an educational resource provided by jaspector.com. It is not legal advice, and it does not substitute for official guidance from the permit authorities listed above. Permit requirements, fees, and processes change frequently. Always verify current requirements directly with the issuing department before beginning any construction project. Use of this page does not create an attorney-client relationship. Jaspector assumes no liability for any outcomes arising from reliance on this information.