Douglas County Washington Energy Code Compliance
WSEC-R 2021 compliance information for builders and contractors in Douglas County.
Code environment
Climate Zone
CZ5
Eastern Washington — east of the Cascade crest.
Wall min R-20 cavity + R-5 continuous, or R-13 cavity + R-10 continuous · Ceiling min R-60 · Window max U-0.30 · WAC 51-11R-40213, Table R402.1.3
Radon Zone
Zone 2
Moderate radon potential — radon-resistant construction recommended but not mandated by state code.
Learn more →County building department
The county building department handles permits for unincorporated areas. Cities within the county may have their own permit offices — see below.
Authority Having Jurisdiction (AHJ)
Douglas County Building Division
- Phone
- (509) 884-7173
- Address
- 140 19th St NW, East Wenatchee, WA 98802
- Hours
- M-F 8am-5pm
Last verified: 2026-04-19
Cities with their own building department
These cities have an independent permit office. If your project is inside city limits, contact the city — not the county — for permits.
Bridgeport
Bridgeport Building Inspector
- Phone
- (509) 449-6296
- Address
- 1206 Columbia Ave, Bridgeport, WA 98813
- Hours
- M-F 8am-5pm
- bridgeport@nwi.net
Last verified: 2026-04-19
Rock Island
Rock Island Building Official
- Phone
- (509) 884-1261
- Address
- 5 N Garden Ave, Rock Island, WA 98850
- Hours
- M-F 8am-5pm
- buildingri@nwi.net
Last verified: 2026-04-19
Waterville
Waterville Building Inspector
- Phone
- (509) 745-8871
- Address
- 104 E Locust St, Waterville, WA 98858
- Hours
- M-F 8am-5pm
- waterville@nwi.net
- Website
- https://ci.waterville.wa.us/
Last verified: 2026-04-19
Not listed? Your project is in unincorporated Douglas County — use the county building department above.
Ready to check your compliance?
Answer a few questions about your project and get a complete R406 credit summary you can submit with your permit application.
Start your WSEC compliance check →Typical project costs in Douglas County
Coming soon as we gather receipt data from local contractors.
Information on this page may be out of date. Report outdated info →