Prosser Building Department

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

Building Department

Prosser Building Division

Phone
(509) 786-7383
Address
1002 Dudley Ave, Prosser, WA 99350
Hours
M-F 8am-5pm
Email
bmorrow@ci.prosser.wa.us
Website
https://cityofprosser.com/building/

Last verified: 2026-04-19

Code environment

Climate Zone

CZ5

Eastern WA — stricter insulation and air sealing minimums apply.

Radon Zone

Zone 2

Moderate potential — mitigation recommended.

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Ready to check your compliance?

wsec.ai generates a complete R406 credit summary you can submit with your permit application to Prosser Building Division.

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