Building Department
Columbia County provides all building related services for the City of Dayton. This includes: building permits, inspections, general building questions, and building code interpretation and expertise.
For building related inquires, please contact the County Building Official: Clark Posey via This email address is being protected from spambots. You need JavaScript enabled to view it. or by phone at 509-382-2361 Ext. 105.
Building permit applications shall be submitted to Dayton City Hall for Planning review and will be forwarded to the building department and other departments as deemed necessary.
Building Permit Applications
Visit the Columbia County Planning & Building website to obtain building permit application forms. Reminder - applications must be submitted to City Hall for Planning review.