Kelso Building Department

WSEC-R 2021 energy code compliance resources for builders and contractors in Kelso, Cowlitz County.

Building Department

Kelso Building & Planning

Phone
(360) 577-3376
Address
203 S Pacific Ave, Kelso, WA 98626
Hours
M-F 9am-5pm
Email
mkardas@kelso.gov
Website
https://www.kelso.gov/building-planning

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 Kelso Building & Planning.

Start your WSEC compliance check →
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