Unlike many other states, Wyoming does not issue a statewide HVAC or mechanical contractor license. Instead, licensing is set by individual cities and counties — most notably Casper, which administers a Mechanical/Plumbing licensing program through its Community Development Department, with separate classifications for Mechanical Contractor, Mechanical Master, Mechanical Journeyman, and Mechanical Apprentice (and a Reciprocal Contractor path for licenses recognized from other Wyoming jurisdictions under SF0114). Statewide law (SF0114, effective July 1, 2024) requires Wyoming municipalities to recognize contractor licenses issued by other Wyoming jurisdictions when certain conditions are met.
Do You Need a Statewide HVAC License to Work in Wyoming?
Based on the official sources reviewed for this guide, Wyoming does not issue a statewide HVAC or mechanical contractor license. Licensing and permitting for HVAC work are managed at the local municipality and county levels. SF0114 (Enrolled Act No. 37, 2024) confirms the legislative framework of contractor licensing at the local level — this means the requirements to legally perform HVAC work can vary significantly depending on where your project is located.
Wyoming State Business Registration Fees for HVAC Contractors
If you operate as a formal business entity — an LLC, corporation, nonprofit, or limited partnership — you register it with the Wyoming Secretary of State. Per the Business Division Filing Fee Schedule (effective July 1, 2021):
| Filing | Fee |
|---|---|
| LLC — Articles of Organization / Continuance / Domestication | $100.00 |
| Profit Corporation — Articles of Incorporation / Continuance / Domestication | $100.00 |
| Nonprofit Corporation — Articles of Incorporation / Continuance / Domestication | $50.00 |
| LLC or Profit Corporation — Certificate of Authority | $150.00 |
| LLC — Reinstatement for No Registered Agent | $350.00 |
| Profit Corporation — Reinstatement for No Registered Agent | $250.00 |
| LLC or Profit Corp — Annual Report License tax | $60 or $.0002 of in-state assets, whichever is greater |
Filings marked with an asterisk may be filed electronically at wyobiz.wyo.gov. These are state filing fees only — they are separate from any municipal trade-licensing fees, business license fees, or local permit fees you may also owe.
Federal EPA Section 608 Certification — Required for Refrigerant Work
The Clean Air Act requires that any technician who maintains, services, repairs, or disposes of equipment that could release refrigerants into the atmosphere must hold a federal EPA Section 608 Technician Certification. Section 608 Technician Certification credentials do not expire.
- Types of Certification:
- Type I: Servicing small appliances.
- Type II: Servicing or disposing of high-pressure appliances.
- Type III: Servicing or disposing of low-pressure appliances.
- Universal: Servicing all types of equipment.
- Tests must be administered by an EPA-approved certifying organization.
City-Level Requirement: Casper Mechanical License Program
The City of Casper, through its Community Development Department (Chief Building Official: Justin Scott, 200 N David St, (307) 235-8254, building@casperwy.gov), administers a Mechanical/Plumbing licensing program with separate Mechanical classifications (per the City's Mechanical/Plumbing License Information cover sheet, effective 2026-01-02). The Mechanical classifications are:
Mechanical Contractor
- Scope: Authorizes the contractor to conduct, carry on, or engage in the business of heating, ventilation, air conditioning, refrigeration, and associated sheet metal work.
- Requirement: Every applicant shall possess, or provide proof of employment of, a full-time licensed mechanical master.
- License fee: $300.00 (new) / $150.00 (renewal). This is one of the license categories that requires proof of insurance.
Mechanical Master
- Scope: Authorizes the contractor to do heating, venting, air conditioning, refrigeration, and associated sheet metal work.
- Experience requirement: Every applicant must show a certificate of completion of a mechanical apprenticeship training program recognized by the federal government, OR the equivalent of four (4) years of experience in a City of Casper licensed mechanical shop and five (5) years of experience as a journeyman or master mechanical in a City of Casper licensed mechanical shop.
- Test: International Code Council (I.C.C.) G29-N or equivalent.
- License fee: $75.00 (new) / $37.50 (renewal). This is a license category that requires proof of testing and/or certification.
Mechanical Journeyman
- Scope: Authorizes the contractor to do heating, venting, air conditioning, refrigeration, and associated sheet metal work that may be required of a mechanical journeyman as an employee of a mechanical contractor.
- Experience requirement: Every applicant must show a certificate of completion of a mechanical apprenticeship training program recognized by the federal government, OR the equivalent of four (4) years of experience in a City of Casper licensed mechanical shop.
- Test: International Code Council (I.C.C.) G31-N, G29-N, or equivalent.
- License fee: $25.00 (new) / $15.00 (renewal). This is a license category that requires proof of testing and/or certification.
Mechanical Apprentice
- Scope: Authorizes the contractor to do heating, venting, air conditioning, refrigeration, and associated sheet metal work that may be required of a mechanical apprentice as an employee of a mechanical contractor.
- Term: A Mechanical Apprentice license "shall be issued to the mechanical contractor in the name of the applicant and shall be valid only for the term of their employment with that contractor."
- License fee: $3.00 (new) / $3.00 (renewal).
Minimum Insurance (applies to all individual Mechanical/Plumbing contractors)
The City of Casper's Mechanical/Plumbing License Classification Minimum Insurance Requirements sets the following minimums:
| Coverage | Minimum |
|---|---|
| Public liability / personal injury or death of one person from one incident | $250,000.00 |
| Personal injury or death of all persons from one incident | $500,000.00 |
| Property damage from one incident | $250,000.00 |
All applicants applying for a license category that requires testing must submit proof of successful testing which meets the requirements of Casper Municipal Code Section 15.11.070 and is applicable to the type of license being applied for.
City-Level Requirement: Casper Reciprocal Contractor (Mechanical Classifications)
The City of Casper also issues a Reciprocal Contractor license (per the City's Reciprocal License Application Form) for mechanical-classification licenses recognized from other Wyoming jurisdictions under SF0114. The reciprocal Mechanical classifications include:
- Mechanical Contractor
- Mechanical Master
- Mechanical Journeyman
- Mechanical Apprentice
The Chief Building Official will review all applications to verify the license held is equivalent to the City of Casper license being applied for. Per the reciprocal application form: "All contractors applying for a reciprocity contractor's license must show proof of $250,000/$500,000 personal injury and $250,000 property damage liability insurance as minimums."
Reciprocal Mechanical classification fees (per the reciprocal application form's schedule):
| Classification | New License Fee | Renew License Fee |
|---|---|---|
| Mechanical Contractor | $5.00 | $3.00 |
| Mechanical Master / Journeyman | $50.00 | $25.00 |
| Plumbing / Mechanical Apprentice | $5.00 | $3.00 |
City-Level Requirement: Casper 2025 Licensed Contractors Roster
The City of Casper publishes a current roster of licensed contractors as a PDF/CSV hybrid. The 2025 roster confirms an active Mechanical tier with sub-classifications including Mechanical / Mechanical Contractor / Mechanical – Low Voltage. The list is searchable by company name and license classification and is updated regularly.
Statewide Code Adoption (Wyoming Department of Fire Prevention and Electrical Safety)
The State of Wyoming, on June 28, 2024, adopted the 2024 suite of International Codes, as published by the Wyoming Department of Fire Prevention and Electrical Safety (State Fire Marshal):
- 2024 International Fire Code
- 2024 International Building Code
- 2024 International Fuel & Gas Code
- 2024 International Mechanical Code
- 2024 International Existing Building Code
- 2023 edition of the National Electrical Code (effective July 1, 2023)
These codes have been adopted by the State of Wyoming (per the Department of Fire Prevention and Electrical Safety). Confirm the codes in force with your local building department before any project.
Wyoming Business Registration Steps for HVAC Contractors
To set up a Wyoming business for HVAC work:
- Choose a Business Structure: Decide whether you will operate as a Sole Proprietor, LLC, Corporation, or other entity.
- Register with the Wyoming Secretary of State: File the appropriate formation documents at wyobiz.wyo.gov (or by paper). The current filing fees are listed in the table above — confirm the latest amounts on the SOS Business Division Filing Fee Schedule.
- Obtain any required municipal trade licenses and permits before bidding or starting work.
(For IRS EIN registration, federal tax setup, and any required workers' compensation insurance, consult the appropriate state and federal agencies directly — those requirements are outside the scope of this state-licensing guide.)
Reciprocity for Wyoming HVAC Contractors
Wyoming has two distinct reciprocity tracks for HVAC work:
Interstate (out-of-state contractors)
Wyoming issues no state HVAC license and the sources reviewed for this guide do not establish a uniform statewide interstate reciprocity. Out-of-state contractors must meet the local licensing requirements in the specific Wyoming city or county where they intend to work; confirm with the local building department for the jurisdiction in question whether any form of reciprocity exists.
Intrastate (Wyoming SF0114, effective July 1, 2024)
Wyoming SF0114 (Enrolled Act No. 37, 2024) requires every Wyoming county, city, town, or other government entity that issues contractor licenses to recognize a license issued to a contractor by another Wyoming jurisdiction, conditioned on:
- The contractor's license being active with the issuing jurisdiction.
- The contractor being in good standing with the issuing jurisdiction and providing any proof of financial assurance required by the accepting jurisdiction.
- The contractor providing proof of successful completion of the International Code Council (ICC) examination for contractor, plumbing, mechanical, or another appropriate examination (or, for fire-systems installation, testing, or maintenance, proof of an appropriate manufacturer certification, including the National Institute for Certification in Engineering Technologies (NICET), American Fire Sprinkler Association (AFSA), National Fire Sprinkler Association (NFSA), or their equivalents).
Nothing in SF0114 prevents an accepting jurisdiction from requiring a contractor to complete application requirements and procedures, satisfactorily complete any testing requirements, or pay fees if the contractor seeks to perform work in the accepting jurisdiction that is not covered under the license issued by the issuing jurisdiction, or that is not at an equivalent level of required competency. The City of Casper has implemented a dedicated Reciprocal Contractor license category that operationalizes the SF0114 framework — contractors holding an active, ICC-tested license from another Wyoming jurisdiction can apply through the Reciprocal Contractor path.