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
Email
swinstead@mac.com
Website
https://ci.castle-rock.wa.us/

Last verified: 2026-04-19

Code environment

Climate Zone

CZ4

Western WA — moderate climate requirements.

Radon Zone

Zone 2

Moderate potential — mitigation recommended.

Learn more →

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.

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