Newcastle Building Department
WSEC-R 2021 energy code compliance resources for builders and contractors in Newcastle, King County.
Building Department
Newcastle Community Development/Permits
- Phone
- (425) 649-4444
- Address
- 12835 Newcastle Way, Ste 200, Newcastle, WA 98056
- Hours
- M-F 8am-5pm
- Website
- https://newcastlewa.gov
- Portal
- Online permit portal →
- Notes
- uses MyBuildingPermit.com
Last verified: 2026-04-19
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 Newcastle Community Development/Permits.
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