Castle Rock Building Department
WSEC-R 2021 energy code compliance resources for builders and contractors in Castle Rock, Cowlitz County.
Building Department
Castle Rock Building Official
- Phone
- (360) 274-8181
- Address
- 141 A St SW, Castle Rock, WA 98611
- Hours
- M-F 8am-5pm
- swinstead@mac.com
Last verified: 2026-04-19
Submittal notes
These apply at Cowlitz County County level — verify city-specific items directly with Castle Rock Building Official.
- Cowlitz County: Cowlitz County requires an approved Planning Clearance Certification (PCC) before building plan review can start.
Code environment
Climate Zone
CZ4
Western WA — moderate climate requirements.
Ready to check your compliance?
wsec.ai generates a complete R406 credit summary you can submit with your permit application to Castle Rock Building Official.
Start your WSEC compliance check →