Wyoming, Big Horn County HVAC Permit Regulations and County Ordinances for Unincorporated Areas
HVAC Permit Requirements in Big Horn County, Wyoming
Big Horn County does not have countywide building codes for properties located in unincorporated areas. Consequently, there is no specific county-level HVAC permit required for these locations. While the county does not enforce building codes, contractors are still required to follow all applicable state-level electrical and fire protection codes.
Although building codes are not enforced by the county, the Land Planning Department strongly recommends that property owners use national building code standards for any improvement projects to ensure safety and to facilitate potential future property sales. If your property is located within a municipal boundary (inside town limits), you must contact the appropriate municipality, as they may have their own specific building codes, zoning, or permit requirements that differ from the unincorporated areas of the county.
Before beginning any construction or improvement project, it is highly recommended that you contact the Big Horn County Land Planning Department to verify if your specific project requires any other types of permits, such as those related to floodplain development, airport protection zones, or septic system installations.
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Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Wyoming, including Big Horn County.
Wyoming Hvac Legislation, Codes, and Guidelines
State-Level Building Codes and Legislation for HVAC in Wyoming
Wyoming does not have a single, mandatory statewide building code that applies to all construction. Instead, the state adopts specific codes that are primarily enforced at the local jurisdictional level (cities and counties). Under Wyoming Statute § 35-9-106, the Wyoming Department of Fire Prevention and Electrical Safety (WDFPES) is authorized to establish minimum fire and electrical safety standards for buildings. While the state adopts these standards, local jurisdictions may choose to adopt and enforce them, often with local amendments.
As of June 28, 2024, the State of Wyoming has adopted the 2024 editions of the International Codes (I-Codes). These codes, which govern HVAC, mechanical, and fuel gas installations, include:
- 2024 International Mechanical Code (IMC)
- 2024 International Fuel Gas Code (IFGC)
- 2024 International Building Code (IBC)
- 2024 International Existing Building Code (IEBC)
- 2024 International Fire Code (IFC)
The Wyoming Department of Fire Prevention and Electrical Safety (WDFPES), led by the State Fire Marshal, is the primary agency responsible for adopting these standards. The WDFPES also conducts plan reviews and inspections for specific types of buildings as mandated by Wyoming Statute § 35-9-108, including state-owned or leased buildings, schools, multi-story public buildings, and public buildings over 5,000 square feet. For most other residential and commercial projects, enforcement is handled by local building departments, which are required by state law to adopt or maintain standards that at least meet the statewide standards if they choose to act as a local enforcement authority.
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