Click to Home
Go To Search
Emergency Alert
Columbia County
341 E. Main St.
Dayton, WA 99328

Building Information and Resources
COVID-19 Update

On May 5, 2020,  Columbia and Garfield counties received a variance to move into Phase II of "reopening Washington." Phase 2 guidelines were issued May 15 and can be accessed at

In Phase 2: All construction, including those activities for which social distancing may not be maintained and the start of new construction projects, is authorized to resume. ALL construction must adhere to Phase 2 Construction  COVID-19 Job Site Requirements

The Home Builders Association of the Tri-Cities website has additional information as well as templates for the required job site postings, including a safety plan, visitors log and a toolbox training and sign-in sheet. 

Building inspections will take place via Facetime, Skype, or when all social distancing guidelines can be met, to be determined by the Building Official. 

Please contact us directly at:
Clint - (509) 382-3941/
Dena - (509) 382-3938/

Pay for your permit online with a debit or credit card HERE.
*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

Please call (509) 382-3941 or email to request a building, mechanical or plumbing inspection. Please allow 24 hours notice.
Required inspections* include, but are not limited to:
  • footings
  • foundation walls
  • underground plumbing installation and pressure test
  • gas piping installation and pressure test
  • rough plumbing installation and water line pressure test
  • rough-in mechanical installation
  • weatherproofing and framing
  • insulation
  • drywall attachment
  • final
*Not all inspections are required for all permit types. 
Electrical inspections are performed by the Washington State Department of Labor and Industries and may be requested by visiting
For water/septic inspections contact Kevin Tureman at or (509) 524-2682.

Residential Design Requirements
Snow Load: 30 psf below 2,500 ft. above mean sea level; call (509) 382-4676 for requirements greater than 2,500 ft. above mean sea level as determined by Snow Load Analysis for Washington.
Wind speed: 110 mph
Seismic Category: C
Weathering Probability for Concrete: Severe
Frost Line Depth: 18"
Termite Potential: slight to moderate
Winter Design Temperature: 6 degrees
Ice Barrier: Not required, but recommended
Flood Hazard: FIRM, adopted 1988
Air Freezing Index: 800
Climate Zone: 5b
Insulation: Ceiling - R49; Wood Frame Wall - R 21 or R13 + R10; Floor R30; Basement Wall and Crawl Space - R15/19

Adopted Building Codes
International Building Code, Standards and amendments 2015 - WAC 51-50
International Residential Code, Standards and amendments 2015 - WAC 51-51
International Mechanical Code, Standards and amendments 2015 - WAC 51-52
International Fire Code, Standards and amendments 2015 - WAC 51-54A
Uniform Plumbing Code, Standards and amendments 2015 - WAC 51-56

Home Contact Us Sitemap Accessibility Copyright Notice Powered by CivicPlus