Planning Applications and Information

Columbia County Planning and Building oversees county land use, zoning, comprehensive plan updates and environmental uses and development. If you cannot find what you are looking for, please contact our office at (509) 382-4676.

Meet our Planning Commission and keep updated on meetings by visiting the Planning Commission page.

For more information, check out our Planning and Building FAQs or visit the links in the menu bar at left.


Pay for your permit online with a debit or credit card via our Permit Payment page.

*Minimum $2 or 2.5% convenience fee applies.

We can also accept checks made out to Columbia County Treasurer or exact cash mailed or delivered to our office located at:
Columbia County Planning and Building
114 S 2nd Street
Dayton, WA 99328

Check your permit fees here:

Building Fee Schedule (PDF)
Planning Fee Schedule (PDF)

Planning-related Applications

Critical Areas, Shorelines, Floodplain

Miscellaneous Permits

Find City of Dayton Permits and Forms