HVAC license requirements by state

AL

Alabama HVAC License Guide

Alabama requires HVAC and refrigeration contractors to be licensed through the Alabama Board of Heating, Air Conditioning and Refrigeration Contractors unless the worker is a registered apprentice under a licensed contractor.

AK

Alaska HVAC License Guide

Alaska HVAC contracting commonly involves a licensed Mechanical Administrator for the appropriate mechanical category, plus contractor registration, business licensing, bonding or insurance records, and local permit checks before regulated work begins.

AZ

Arizona HVAC License Guide

Arizona HVAC contractors generally need a Registrar of Contractors license when the project requires licensing under ROC rules, with air conditioning and refrigeration work commonly tied to residential, commercial, or dual classifications such as R-39, C-39, or CR-39.

AR

Arkansas HVAC License Guide

Arkansas requires HVACR licensing for covered heating, ventilation, air conditioning, and refrigeration work. Contractors should confirm the license class that matches the systems they install, service, or supervise.

CA

California HVAC License Guide

California requires a CSLB contractor license for most HVAC contracting when the job meets the state contractor threshold or requires a permit. HVAC work commonly falls under the C-20 warm-air heating, ventilating and air-conditioning classification, while refrigeration-focused work may use C-38.

CO

Colorado HVAC License Guide

Colorado HVAC licensing is largely local. HVAC contractors should confirm city or county mechanical contractor requirements, local permits, and inspection rules before bidding work, especially in Denver and other Front Range jurisdictions.

CT

Connecticut HVAC License Guide

Connecticut HVAC work is licensed through the Department of Consumer Protection. Common pathways include contractor and journeyperson licenses for heating, piping, and cooling work, with apprentices gaining supervised experience before advancing.

DE

Delaware HVAC License Guide

Delaware requires HVACR work to be performed by or under a licensed Master HVACR or Master HVACR Restricted professional. Apprentices register through the state apprenticeship system and business owners also need the proper business licensing.

FL

Florida HVAC License Guide

Florida HVAC contractors generally need licensure through DBPR and the Construction Industry Licensing Board. Certified air conditioning contractors can work statewide within the license class, while registered contractors are tied to local competency rules.

GA

Georgia HVAC License Guide

Georgia HVAC work is regulated through conditioned air contractor licensing. Class I is restricted by system size, while Class II supports unrestricted conditioned air contracting within the state’s rules.

HI

Hawaii HVAC License Guide

Hawaii HVAC businesses generally need a Class C specialty contractor license when operating as an HVAC contractor. C-52 covers ventilating and air conditioning, C-40 covers refrigeration, and C-44 can apply to sheet metal and ductwork.

ID

Idaho HVAC License Guide

Idaho HVAC work generally follows apprentice, journeyman, and contractor licensing under the state building-safety and occupational licensing framework. Contractors should confirm state credentials and local mechanical permits before installations.

IL

Illinois HVAC License Guide

Illinois HVAC licensing is largely local. Contractors should verify city or county mechanical contractor registration, permits, inspections, business licensing, and EPA Section 608 requirements before performing regulated HVAC work.

IN

Indiana HVAC License Guide

Indiana does not operate one universal statewide HVAC contractor license. HVAC companies should verify local contractor licensing or registration, permits, inspections, business records, and EPA Section 608 requirements for each service area.

IA

Iowa HVAC License Guide

Iowa HVAC and mechanical work is overseen through the Plumbing and Mechanical Systems Board. Contractors should confirm apprentice, journeyperson, master, and contractor requirements, plus local permits and business registration.

KS

Kansas HVAC License Guide

Kansas does not use one universal statewide HVAC contractor license. HVAC businesses should verify city or county mechanical contractor licensing, permits, inspections, business registration, and EPA Section 608 requirements before regulated work begins.

KY

Kentucky HVAC License Guide

Kentucky requires HVAC licensing for covered HVAC work, with roles such as apprentice, journeyman, master, and contractor. Businesses should verify state licensing and local permit requirements before scheduling regulated work.

LA

Louisiana HVAC License Guide

Louisiana HVAC contracting can require licensing through the Louisiana State Licensing Board for Contractors depending on project type and value. Contractors should confirm residential, commercial, and mechanical scope before bidding.

ME

Maine HVAC License Guide

Maine HVAC companies should verify the fuel and system type before dispatch. Oil, solid fuel, propane, natural gas, and related heating work can require specific state credentials, while local permits and electrical coordination may also apply.

MD

Maryland HVAC License Guide

Maryland HVACR contractors and technicians should verify licensing through the Maryland Board of Heating, Ventilation, Air-Conditioning, and Refrigeration Contractors, then confirm local permits and inspections for each job.

MA

Massachusetts HVAC License Guide

Massachusetts HVAC technicians generally need EPA certification for refrigerants, while refrigeration work on systems of 10 tons or greater requires state refrigeration licensing through Massachusetts public safety regulators.

MI

Michigan HVAC License Guide

Michigan HVAC contractors need a Mechanical Contractor license through LARA for heating, cooling, refrigeration, ductwork, hydronic, fuel gas, and related classifications; trainees must work under a licensed contractor.

MN

Minnesota HVAC License Guide

Minnesota HVAC businesses generally need a $25,000 mechanical contractor bond filed with the state, while Minneapolis, St. Paul, and other cities may require specialty competency cards and local permits.

MS

Mississippi HVAC License Guide

Mississippi HVAC contractors should check MSBOC licensing for residential work at qualifying thresholds and commercial work at larger thresholds, then confirm local permits for smaller or jurisdiction-specific jobs.

MO

Missouri HVAC License Guide

Missouri HVAC licensing is local. Kansas City and St. Louis use mechanical contractor credentials, permits, or certificates, so contractors should verify the city or county rules before each installation or service territory expansion.

MT

Montana HVAC License Guide

Montana HVAC technicians do not need a state HVAC trade license, but HVAC business owners generally need construction contractor registration or an independent contractor exemption, plus EPA certification for refrigerant work.

NE

Nebraska HVAC License Guide

Nebraska HVAC licensing is mainly local. Contractors should check Omaha ACAD credentials, Lincoln mechanical or gas-piping requirements, and municipal permits before assigning installation or regulated service work.

NV

Nevada HVAC License Guide

Nevada HVAC contractors generally need an NSCB contractor license, often C-1 for plumbing and heating or C-21 for refrigeration and air conditioning; technicians work under licensed contractors rather than holding state HVAC licenses themselves.

NH

New Hampshire HVAC License Guide

New Hampshire HVAC workers need state licensing when performing fuel gas fitting, and mechanical businesses providing gas, plumbing, domestic appliance, or hearth services must maintain proper state business licensing.

NJ

New Jersey HVAC License Guide

New Jersey HVACR contractors need a Master HVACR Contractor license from the State Board of Examiners, plus business registration, bond and insurance records, and local permit compliance for regulated jobs.

NM

New Mexico HVAC License Guide

New Mexico HVACR work generally requires state licensing through the Construction Industries Division, with journeyman certificates for workers and MM contractor classifications for businesses performing gas, HVAC, refrigeration, sheet metal, or mechanical work.

NY

New York HVAC License Guide

New York HVAC licensing is local. Contractors should verify the city or county rules at the job address, especially in New York City, Buffalo, Syracuse, and other municipalities with HVAC, refrigeration, boiler, or oil-burning equipment credentials.

NC

North Carolina HVAC License Guide

North Carolina HVAC contractors need state licensing through the plumbing, heating, and fire sprinkler board for heating and cooling work, while refrigeration contracting is licensed through the State Board of Refrigeration Contractors.

ND

North Dakota HVAC License Guide

North Dakota HVAC work is mostly local, but contractors working on qualifying projects need a state contractor license through the Secretary of State, and cities such as Fargo may require journeyman or master mechanical and fuel gas licenses.

OH

Ohio HVAC License Guide

Ohio HVAC contractors need a state commercial HVAC contractor license through OCILB; technicians can work under licensed contractors, but businesses performing commercial HVAC contracting must meet experience, exam, insurance, and renewal requirements.

OK

Oklahoma HVAC License Guide

Oklahoma HVAC workers must be registered or licensed through the Construction Industries Board, with mechanical apprentices working under licensed contractors and journeyman or contractor licenses available in limited and unlimited scopes.

OR

Oregon HVAC License Guide

Oregon HVAC contractors commonly need the Limited Maintenance Specialty Contractor HVAC/R license for business work, while individuals performing limited-energy electrical activity may need Class A or Class B Limited Energy Technician licensing.

PA

Pennsylvania HVAC License Guide

Pennsylvania HVAC licensing is local, but residential contractors may also need state Home Improvement Contractor registration; Philadelphia and Pittsburgh can add trade licenses, permits, insurance, and inspection requirements.

RI

Rhode Island HVAC License Guide

Rhode Island HVAC-related work requires state licensing through the Department of Labor and Training for trades such as sheet metal, refrigeration, pipefitting, and oil heat, and contractors also need registration through the Contractors Registration and Licensing Board.

SC

South Carolina HVAC License Guide

South Carolina HVAC contractors need state licensing if they contract for HVAC work: commercial mechanical contractors use the Contractor Licensing Board, while residential specialty HVAC contractors use the Residential Builders Commission.

SD

South Dakota HVAC License Guide

South Dakota HVAC licensing is city-based. Sioux Falls licenses mechanical and refrigeration contractors, while Rapid City licenses mechanical apprentices, installers, contractors, gas fitters, and gas fitting contractors.

TN

Tennessee HVAC License Guide

Tennessee HVAC contractors generally need a state contractor license before bidding projects of $25,000 or more, with CMC and CMC-C classifications covering full mechanical and HVAC/refrigeration work.

TX

Texas HVAC License Guide

Texas HVAC work requires either a licensed Air Conditioning and Refrigeration contractor or a registered or certified technician working under a licensed contractor, with TDLR issuing Class A and Class B licenses plus endorsements.

UT

Utah HVAC License Guide

Utah HVAC businesses need an S350 HVAC Contractor specialty license through DOPL; apprentices and technicians work under licensed contractors rather than holding a separate state HVAC technician license.

VT

Vermont HVAC License Guide

Vermont HVAC technicians who install or service gas or oil heating systems generally need the Electrical Specialist A1 license, while refrigeration and air conditioning work generally uses the C3 Electrical Specialist license.

VA

Virginia HVAC License Guide

Virginia HVAC journeymen, masters, and contractors need DPOR licensing, with contractor classes based on contract value and tradesman categories covering residential HVAC, HVA, gas fitting, LPG, and natural gas fitter provider work.

WA

Washington HVAC License Guide

Washington HVAC contractors need state contractor licensing and may need specialty electrical credentials such as 06A or 06B for HVAC/refrigeration work, while cities such as Seattle and Spokane can add local refrigeration, gas, or contractor requirements.

WV

West Virginia HVAC License Guide

West Virginia HVAC workers need Division of Labor certification, while contractors need the HVAC contractor classification for covered residential and commercial projects that meet the state project-value thresholds.

WI

Wisconsin HVAC License Guide

Wisconsin HVAC contracting businesses need DSPS HVAC contractor registration and must identify an HVAC qualifier who meets experience or education requirements and passes the qualifier exam.

WY

Wyoming HVAC License Guide

Wyoming HVAC licensing is local. Cheyenne licenses HVAC and refrigeration apprentices, journeymen, masters, and contractors, while Casper licenses mechanical contractors, masters, journeymen, apprentices, boiler operators, and gas fitters.

Is an HVAC license required in every state?

No. Some states license HVAC contractors directly, some use mechanical or specialty contractor licenses, and others rely heavily on local licensing. Always confirm the state and city rules before taking regulated work.

Is EPA Section 608 the same as an HVAC contractor license?

No. EPA Section 608 is a federal refrigerant certification. A contractor license, business registration, or local mechanical permit may still be required for the company to perform HVAC work.

How should an HVAC company track licensing details?

Keep license numbers, renewal dates, insurance certificates, permit records, inspection notes, and technician credentials connected to customer and job records.