What mechanical / hvac code does Wyoming use?
Wyoming currently follows UMC 2021 for mechanical / hvac work. Always confirm the in-force edition with the local Authority Having Jurisdiction (AHJ) — county or city amendments can apply.
Mechanical / HVAC Code Adoption
Wyoming Mechanical / HVAC Code: UMC 2021
Wyoming follows UMC 2021 as the basis for mechanical / hvac work. Permits and inspections are issued by the local Authority Having Jurisdiction (AHJ), which may publish additional amendments.
Adoption details
- Model code family
- IMC / UMC
- Adopted edition
- UMC 2021
- Last verified
- 2026-05-29
- Source
- Adoption tracker
Note: State plumbing rules follow the UPC; local jurisdictions vary. Verify with the AHJ. (Mechanical code typically derives from the plumbing-code family.)
Related resources for Wyoming
Frequently Asked Questions
Do I need a permit for mechanical / hvac work in Wyoming?
Most mechanical / hvac work in Wyoming — including new installations, system replacement, and gas-fueled appliance hookups — requires a permit from the local building department and an inspection at completion. Homeowner permits are typically allowed for owner-occupied residences; commercial work requires a licensed contractor.
Where do I check Wyoming mechanical / hvac code amendments?
Local jurisdictions (city or county) often publish amendments on the state's building-codes board website or in the municipal code. The current UMC 2021 text is published by its model-code body (ICC, IAPMO, or NFPA depending on the trade).
Are there any unusual mechanical / hvac requirements in Wyoming?
State plumbing rules follow the UPC; local jurisdictions vary. Verify with the AHJ. (Mechanical code typically derives from the plumbing-code family.)
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