Spokane Valley Building Department
WSEC-R 2021 energy code compliance resources for builders and contractors in Spokane Valley, Spokane County.
Building Department
Spokane Valley Permit Center
- Phone
- (509) 720-5240
- Address
- 10210 E Sprague Ave, Spokane Valley, WA 99206
- Hours
- M-F 8am-5pm
Last verified: 2026-04-19
Submittal notes
These apply at Spokane County County level — verify city-specific items directly with Spokane Valley Permit Center.
- Spokane City + Spokane County: Spokane City and Spokane County both require 2021 Duct Leakage Affidavits for new construction AND existing-home remodels before final occupancy — note in the submittal package that the affidavit will be provided at final.
Code environment
Climate Zone
CZ5
Eastern WA — stricter insulation and air sealing minimums apply.
Radon Zone
Zone 1
High potential — passive mitigation system required (WAC 51-51-60101, Appendix AF).
Learn more →Ready to check your compliance?
wsec.ai generates a complete R406 credit summary you can submit with your permit application to Spokane Valley Permit Center.
Start your WSEC compliance check →