Jurisdiction directory

Wyoming home project permits by county

Many Wyoming households live outside city limits, where the county building department — not a city — issues the permit. 6 Wyoming counties, covering the state's largest jurisdictions, are inventoried here.

Model reviewed August 2026

Counties covered

largest jurisdictions first

Municipalities tracked

in Wyoming

Population covered

0.3M

residents in listed counties

Code basis

Local

Local adoption of the IRC; no statewide residential code

Featured counties

The largest and most active permit jurisdictions in the state.

Laramie County100,595 residents · seat Cheyenne Natrona County79,955 residents · seat Casper Campbell County47,026 residents · seat Gillette Sweetwater County41,765 residents · seat Green River Fremont County39,234 residents · seat Lander Albany County38,880 residents · seat Laramie

All Wyoming counties we cover

6 counties, largest first.

Laramie CountySeat: Cheyenne · 100,595 residents Natrona CountySeat: Casper · 79,955 residents Campbell CountySeat: Gillette · 47,026 residents Sweetwater CountySeat: Green River · 41,765 residents Fremont CountySeat: Lander · 39,234 residents Albany CountySeat: Laramie · 38,880 residents

Sources

Sources & verification

Wyoming Department of Fire Prevention and Electrical Safety

Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.