Sunnyside Building Department
WSEC-R 2021 energy code compliance resources for builders and contractors in Sunnyside, Yakima County.
Building Department
Sunnyside Building Division
- Phone
- (509) 837-4229
- Address
- 818 E Edison Ave, Sunnyside, WA 98944
- Hours
- M-F 8am-5pm
Last verified: 2026-04-19
Submittal notes
These apply at Yakima County County level — verify city-specific items directly with Sunnyside Building Division.
- Yakima County: Yakima County: Rural ADU rules and water availability requirements differ materially from urban projects — confirm water availability and ADU-specific code sections before permit submittal.
Code environment
Climate Zone
CZ5
Eastern WA — stricter insulation and air sealing minimums apply.
Ready to check your compliance?
wsec.ai generates a complete R406 credit summary you can submit with your permit application to Sunnyside Building Division.
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