State plumbing guide · WY
Plumbing in Wyoming
Wyoming leaves plumbing licensing to cities and counties such as Cheyenne and Casper, which adopt their own codes. Extreme cold and wind make freeze protection the top priority.
- Median home built
- 1982
- Built before 1980
- 48%
- Owner-occupied
- 72%
- Winter
- Long, hard freezes
- General statewide rating
- Plumbing code
- IPC
- City guides
- 0
Housing figures: U.S. Census Bureau, ACS 2024 1-year (B25035, B25034).
How to check a plumber's license in Wyoming
Plumbing contractors are licensed by cities in Wyoming. In Cheyenne, plumbing requires a city contractor license, and everyone working on a plumbing job site must hold a master, journeyman or apprentice license or be a qualified supervisor. [1]
Seasonal problems to plan for in Wyoming
- Winter
- Hard freezes: protect exposed pipes, disconnect hoses. Frozen pipes.
- Summer
- Irrigation season exposes hidden leaks and backflow problems.
Which plumbing code applies in Wyoming
Wyoming cities adopt their own plumbing codes. Casper, for example, has adopted the 2024 International Plumbing Code, Fuel Gas Code and Residential Code with local amendments. [2]
How old Wyoming's homes are
Statewide, the median home was built in 1982 and 48% of homes predate 1980. Homes like that were usually built with copper or CPVC supply, plastic drains, and in some homes gray polybutylene supply pipe. The city guides below show how much that varies within the state.
Wyoming plumbing questions
How do I check a plumber's license in Wyoming?
Ask the plumber which city or county license they hold and verify it locally.
Which plumbing code applies in Wyoming?
It's set by your city or county building department.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035, B25034) · checked 2026-10-01
- City of Cheyenne, Contractor Licensing Regulations · checked 2026-10-01
- City of Casper, Building and Fire Code Resources · checked 2026-10-01