WY

Wyoming Building Codes

Current base code, county-level adoption data, special-zone overlays, and source links for restoration contractors.

Counties
23
ZIPs
195
Special zones
245
Local amendments
0

Current State Code

Verified state-level adoption record from SkyCanvass jurisdiction data.

Adoption model
municipal_adoption
Base code
irc_2018
Effective date
2024-01-01
Next update
Not scheduled

Wyoming has NO mandatory statewide residential building code. Code adoption is local option. State Fire Marshal has limited commercial jurisdiction. Climate Zones 5B/6B/7. Heavy snow loads. Ice barrier required. Seismic varies. 23 counties. base_code corrected 2026-05-18 — was none_adopted but state has municipal adoption pattern with documented IRC/IBC base

County Guides

County pages include local code editions, amendment flags, and jurisdiction-specific links.