Permit Requirements for Evansville, Wyoming
For HVAC projects in Evansville, determining the correct permitting authority depends on whether the project site is located within the incorporated city limits or in an unincorporated area of Natrona County.
Authority Having Jurisdiction (AHJ)
Most jurisdictions require permits for HVAC work to ensure safety and code compliance. The governing body responsible for issuing these permits varies by specific location:
General HVAC Guidelines
Permits are usually required for new installations, structural modifications, or major repairs. While minor maintenance or cosmetic updates may be exempt, landowners should always verify local codes before work begins.
Help Us Improve This Guide
If you have found a direct link to a permit portal or a specific local ordinance for HVAC in this area, please submit an update.
Because Evansville is located within Natrona County, the following broader county regulations may also apply to your project:
Wyoming, Natrona County Hvac Permit Regulations and County Ordinances for Unincorporated Areas
Natrona County HVAC Permit Requirements
Natrona County, Wyoming, requires permits for various construction and alteration projects, including HVAC systems. The county's Building and Safety Division, also referred to as the Development Department, oversees these requirements. Permits ensure compliance with building codes for safety and public welfare. Building without a permit can result in fines, the potential need to remove the structure, and double permit fees.
County Building & Safety Division Jurisdiction
The Natrona County Building Department is responsible for plan review, permit issuance, and inspections. They work in conjunction with other county departments and agencies to ensure community safety. Permits are required for new buildings, additions, residential work (such as decks and fireplaces), renovations, and electrical, plumbing, and mechanical (HVAC) systems. The county has adopted the 2024 International Building Code, along with other International Codes for existing buildings, fire, fuel gas, mechanical, plumbing, and residential, as well as the 2023 National Electrical Code.
Rules for Properties in Unincorporated Areas
For properties in unincorporated areas of Natrona County, contractors must be currently licensed by Natrona County and renew their licenses annually. Contractors are also required to carry specific amounts of public liability and property damage insurance. Property owners may obtain permits and perform mechanical, electrical, and plumbing work on their own primary residence, provided the work complies with adopted building codes and all required inspections are obtained. All contractors performing work in unincorporated areas must be licensed by Natrona County.
Resources to Learn More
The following statewide building codes and regulations apply universally to all jurisdictions within Wyoming:
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.
Resources to Learn More