HVAC contractor license requirements by state: what the business needs

An HVAC contractor license is the state's permission for a business to contract: to bid, sign contracts and pull permits for heating, cooling and refrigeration work.

Your technicians' journeyman cards, EPA 608 certificates and industry credentials are the individuals' qualifications.

The two are separate objects, issued under separate rules, and holding one never substitutes for the other.

The split is cleanest in states that issue a company licence outright: Texas licenses the contractor business itself (Class A or Class B air-conditioning and refrigeration through TDLR), and Florida licenses air-conditioning contractors through DBPR's Construction Industry Licensing Board as either certified (statewide) or registered (local).

Your employees' own licences are a hiring question; the contractor license is a licence-to-operate question.

The same split runs through the plumbing trade, with its own boards, classes and thresholds — our plumbing contractor license guide covers that side.

Six states blur the line: in Maryland, Delaware, New Jersey, Kentucky, Connecticut and Rhode Island, the master-level individual license doubles as the contracting license — the company operates through a licensed master rather than a separate firm credential (Maryland, for example, has no separate HVAC company licence at all).

New Jersey formalises it as a "bona fide representative": a licensed master HVACR contractor through whom the business pulls its permits.

Keep the layers straight when you read a job posting or a competitor's truck lettering too: what your techs hold personally — journeyman and master cards (the licence ladder covered in our HVAC technician license guide), EPA 608 certificates, industry certifications — are qualifications of the individual, not the business credential this page is about.

We compare the tech-side certifications in our HVAC certification guide.

Four states verifiably have no statewide HVAC contractor license: Illinois, Indiana, Kansas and Missouri — HVAC contractor licensing there is local.

Minnesota's closest state-level requirement is a $25,000 mechanical contractor bond filed with the Department of Labor and Industry, with local licences doing the rest.

Montana issues a general Construction Contractor License with no trade exam attached, North Dakota's statewide piece is a general Secretary of State contractor license for jobs over $4,000, and Nebraska's only statewide requirement is registration under the Contractor Registration Act with its Department of Labor.

Our research also did not confirm a statewide HVAC contractor license in Colorado, New York, Pennsylvania, South Dakota, Wyoming, Vermont or Maine — but an absence is not a licence to skip the paperwork.

In these states, cities and counties commonly license what the state does not, so treat the local building department as the licensing authority until the state tells you otherwise.

Where a state license exists, dollar thresholds decide when it kicks in, and they are all over the map: none at all in North Carolina and Oklahoma (mechanical); $1,000 in Arizona, California and Virginia (Class C); $1,500 in Hawaii; $2,500 for minor work in Florida; $4,000 in North Dakota (the general SOS license); $10,000 in Louisiana and South Carolina (commercial); $25,000 in Tennessee; $50,000 for commercial work in Mississippi and Arkansas; and $5,000 residential / $25,000 commercial in West Virginia.

One trap to clear up while you're mapping exemptions: a general "handyman" dollar exemption usually does not cover this trade.

Nevada's under-$1,000 exemption excludes plumbing, heating and air-conditioning work, and Arizona's and California's under-$1,000 exemptions fail the moment a permit is needed.

Check the trade-specific rule, not the general one.

Most contractor licenses hang on one named person — the qualifier — whose exam pass and documented experience the company trades on.

The job title changes by state: Florida and Tennessee use "qualifying agent," Arizona, Louisiana, Mississippi and New Mexico "qualifying party," California an RMO (Responsible Managing Officer) or RME (Responsible Managing Employee), New Jersey a "bona fide representative."

If you own the shop and hold the experience yourself, you are usually the qualifier; if not, you hire one.

The experience bar is real and documented.

California's CSLB qualifier must be at least 18 with four years of journey-level experience (journeyperson, foreperson, supervising employee or contractor) within the last 10 years in the classification.

New Mexico's MM-3 HVAC contractor class requires four years of experience.

Oklahoma's mechanical contractor applicants need the journeyman requirements plus one more year — four years total on the standard path — before sitting both exams.

Two more state rules bite in practice: how many companies one qualifier may serve (banned outright in some states, allowed only with common ownership in others) and how long you have to replace a qualifier who leaves — Florida gives 60 days and blocks contracting in the gap.

Both are worth checking before you designate someone or lose one; our HVAC contractor license qualifier guide walks the full state-by-state map, from every state's title to the replacement clocks.

The common pattern is two exams: a trade exam in your classification and a business-and-law exam.

California makes the pattern explicit — the CSLB qualifier passes a law and business exam plus the trade exam, both computer-based through PSI.

Arizona pairs the trade exam (PSI) with an online open-book Arizona Statutes and Rules exam through Gmetrix, and the ROC wants at least 70% on each.

Florida's certification exam runs on two axes as well — trade knowledge plus business & finance — applied for through Professional Testing, Inc. and delivered by Pearson VUE.

The vendor varies by state, and it matters because it is where you book and prepare.

PSI delivers state HVAC and/or plumbing licensing exams in roughly twenty states, including Arizona, California, Georgia, Maryland, Michigan, Mississippi, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, South Carolina, Texas (TDLR ACR) and Virginia.

Prov runs them in Arkansas (HVACR), Delaware, New Hampshire, Utah and West Virginia — and in Tennessee, contractor exams moved to Prov from July 1, 2026 (PSI keeps previously scheduled exams through September 2026).

Elsewhere you will meet Pearson VUE (Florida CILB), Prometric (Hawaii), ICC and state-run exams (Minnesota DLI runs its own).

Do not book a NASCLA exam as a shortcut: the NASCLA accredited exam does not replace HVAC or plumbing trade exams in the states we checked — Arizona, Louisiana, Nevada and New Mexico accept it only for general building (and electrical) classifications, and NASCLA has no plumbing exam in use yet.

Tennessee does accept the NASCLA National Commercial exam for its commercial classifications, so check your state's list before assuming either way.

Because every exam is state-specific, a practice test written for another state's license is poor preparation.

Use the exam guide your board or its vendor publishes, and confirm the current vendor on the board's site — vendors change, as Tennessee's move shows.

Bond amounts are set state by state and swing widely: California requires a $25,000 contractor bond (plus a $25,000 qualifier bond when the qualifier is not an owner), Alabama's HACR an active-contractor performance bond of $20,000, Minnesota a $25,000 mechanical contractor bond, Washington $15,000 for specialty contractors, Alaska and New Mexico $10,000, Oklahoma $5,000, DC $5,000 from the company and $5,000 from the designated master, New Jersey $3,000, and Idaho a $2,000 compliance bond.

Maryland skips the bond entirely and runs on insurance instead — at least $300,000 general liability plus $100,000 property damage for HVACR licensees who sign contracts.

Insurance minimums are their own patchwork.

Kentucky HVAC contractors must carry at least $500,000 general liability and $300,000 property damage.

Ohio licensed contractors carry at least $500,000 in liability including completed-operations coverage, in the company's name.

Florida asks air-conditioning contractors for at least $100,000 public liability and $25,000 property damage.

Texas writes the minimums per license class: Class A ACR contractors $300,000 per occurrence / $600,000 aggregate / $300,000 products-completed operations; Class B $100,000 / $200,000 / $100,000.

Read your own state's numbers — not a neighbouring state's — and confirm them with the board at renewal time, because the amounts above are examples of the range, not a standard.

The board's application packet names the bond form, the coverage limits and who must be named on the certificate.

Every state runs its own process, but the sequence repeats.

Work it in this order:

1. Identify the issuing agency and your classification. It may be a contractors board (Arizona ROC, Nevada NSCB), a licensing department (Texas TDLR, Florida DBPR), or a trade-specific board. Pick the classification that matches the work you actually sell — residential versus commercial splits are common.
2. Settle the qualifier question. Confirm who qualifies the license, that their experience meets the state's bar and can be documented, and that they are not already tied to another company where the state forbids it.
3. Book and pass the exams. Trade exam first, business-and-law where required, through the board's named vendor.
4. File the application. Experience documentation, classification request, and the board's fee — which each board sets itself, so get the current amount from the application packet rather than a forum.
5. Post the bond and bind the insurance. Amounts and forms come from the board; your insurer files the certificate.
6. Calendar the renewal before you calendar the first job. Cycles differ — Florida certified and registered contractors renew every two years with 14 hours of continuing education per biennium — and lapses stop permits, not just paperwork.

There is no verified national timeline for how long this takes: exam scheduling, application queues and licence processing are each board's own.

What slows shops down predictably is doing the steps out of order — sitting the trade exam before confirming the qualifier's experience counts, or leasing the shop before learning the state licenses your city directly.

A license with nobody to work under it earns nothing, of course — our guide to hiring HVAC and plumbing techs picks up exactly there, from sourcing to pay plans to the credentials to verify.

The table below maps each jurisdiction's statewide requirement for an HVAC contracting business.

Where our research did not confirm a statewide license, the row says so — which is not the same as "no license needed": cities and counties often license what the state does not.

Rules change; confirm the current requirement with the named agency, or with your city or county building department where licensing is local, before you bid.

State	Statewide requirement for HVAC contracting
Alabama	Contractor certification from the Board of Heating, Air Conditioning & Refrigeration Contractors (HACR), in two exam categories: Heating & Air Conditioning, and Refrigeration.
Alaska	Register as a contractor with CBPL and hold — or have assigned — a Mechanical Administrator licence covering the discipline (plumbing, heating, sheet metal or refrigeration).
Arizona	Registrar of Contractors license by class: C-39 (commercial A/C and refrigeration), R-39 (residential, incl. solar), CR-39 (dual); C-49 covers commercial refrigeration.
Arkansas	Every individual who designs, installs, services or repairs an HVACR system needs an HVACR licence or registration from the HVACR Licensing Board (Dept. of Labor and Licensing).
California	CSLB license for any job of $1,000 or more (labor and materials) or any job needing a building permit.
Colorado	Our research did not confirm a statewide HVAC contractor license; cities and counties license HVAC work (Denver among them). Check your city or county.
Connecticut	Department of Consumer Protection trade boards issue paired contractor/journeyperson licenses — S-1/S-2 unlimited heating, piping and cooling; D-1/D-2 warm air, A/C and refrigeration; plus limited classes.
Delaware	The Board of Plumbing, HVACR Examiners issues master-level licenses only — Master HVACR and Master HVACR Restricted; there is no state journeyman rung.
District of Columbia	Refrigeration/air-conditioning contractor license requiring a designated DC-licensed master, plus surety bonds of $5,000 (company) and $5,000 (master).
Florida	DBPR Construction Industry Licensing Board licenses air-conditioning contractors as certified (statewide) or registered (local).
Georgia	No state license for individual techs; the state licenses conditioned air contractors (Class I and II) through the Division of Conditioned Air Contractors, State Construction Industry Licensing Board.
Hawaii	Specialty contractor class C-52 "Ventilating and air conditioning contractor" from the Contractors License Board (DCCA).
Idaho	HVAC contractor certificate of competency from DOPL's HVAC Board — board exam plus a $2,000 compliance bond.
Illinois	No state HVAC license; HVAC contractor licensing is local (Chicago among the cities with its own requirements).
Indiana	No statewide HVAC contractor license; Indianapolis confirms licensing is at each municipality's discretion.
Iowa	Contractor license (plumbing, mechanical, HVAC-refrigeration) requires a permanent place of business, workers' comp and unemployment-insurance compliance, and a master licensee held or employed.
Kansas	No state HVAC contractor license, bond or insurance amount — requirements come from the local jurisdiction.
Kentucky	The company must have a master HVAC contractor (employee or subcontractor) in responsible charge, who notifies DHBC when the role starts and ends.
Louisiana	State contractor license from the LSLBC for mechanical projects over $10,000 including labor and materials.
Maine	Our research did not confirm a statewide HVAC contractor license; heating businesses rely on individually licensed Fuel Board technicians. Check the Fuel Board for your work.
Maryland	No separate company license — contracting runs under an individual Master, Master Restricted or Limited HVACR license, with $300,000 GL / $100,000 property damage insurance for licensees who sign contracts.
Massachusetts	Refrigeration Contractor license (OPSI): 100 hours of approved refrigeration training, an exam, and a $150 application fee.
Michigan	Mechanical Contractor license from LARA's Bureau of Construction Codes, issued by work classification (HVAC equipment, hydronic heating & cooling, ductwork, refrigeration, heating/refrigeration service, and specialties).
Minnesota	No state mechanical contractor license — file a $25,000 mechanical contractor bond with DLI ($100 filing, valid two years) for gas, heating, cooling, A/C or refrigeration work; local licences apply on top.
Mississippi	MSBOC commercial license (Certificate of Responsibility) for contractors and subcontractors on commercial jobs over $50,000, including equipment installation.
Missouri	No state HVAC contractor license, bond or exam; each city or county sets requirements (Kansas City, for example, requires a qualified individual's Certificate of Qualification).
Montana	State Construction Contractor License with no trade exam, qualifier or bond requirement listed; ownership and officer changes reported within 30 days.
Nebraska	The statewide requirement is registration under the Contractor Registration Act with the Department of Labor; our research confirmed no state HVAC contractor license — check your city for mechanical licensing.
Nevada	Nevada State Contractors Board license: C-21 Refrigeration and Air-Conditioning, or C-1 Plumbing and Heating for the heating/air-circulation subclass (C-1f).
New Hampshire	No statewide HVAC contractor license; the OPLC Mechanical Business Entity license covers plumbing, fuel gas, hearth and appliance businesses — not HVAC/refrigeration as such.
New Jersey	The HVACR business operates through a bona fide representative — a licensed master HVACR contractor — and needs a pressure seal to pull HVACR permits.
New Mexico	CID mechanical contractor class MM-3 (Heating, ventilation & air conditioning), requiring four years of experience.
New York	Our research did not confirm a state HVAC contractor license; New York City handles much of this work through its own credential paths (e.g., FDNY for permitted refrigeration systems). Check the city.
North Carolina	License from the State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors before engaging in the business; refrigeration contracting is licensed separately by the NC State Board of Refrigeration Contractors in four classes.
North Dakota	Secretary of State contractor license for jobs over $4,000 — a general license covering HVAC firms, not a trade-exam license.
Ohio	OCILB contractor license — the only state HVAC license, issued to an individual as an HVAC, refrigeration, hydronics, electrical or plumbing contractor.
Oklahoma	Mechanical contractor through the Construction Industries Board: journeyman requirements plus one more year (four years total on the standard path) and both a trade and a business/law exam.
Oregon	Construction Contractors Board (CCB) license with the appropriate residential and/or commercial endorsement — required to undertake, offer or bid work.
Pennsylvania	Statewide, residential work needs Home Improvement Contractor registration with the Attorney General (HICPA) — a registration, not a trade license; cities run their own mechanical licensing.
Rhode Island	A mechanical company either has a licensed master as an officer/partner continuously supervising, or holds a DLT mechanical contractor license backed by a continuously employed master; CRLB registration applies too.
South Carolina	Contractor's Licensing Board license for mechanical contracting when total construction cost exceeds $10,000 (raised from $5,000, effective May 19, 2023).
South Dakota	Our research did not confirm a statewide HVAC contractor license; cities such as Sioux Falls license mechanical contractors. Check your city.
Tennessee	State contractor license for plumbing and HVAC work (including as a subcontractor) at $25,000 or more; mechanical contracting falls under the CMC classification (CMC-C covers HVAC, refrigeration, gas piping).
Texas	TDLR air-conditioning and refrigeration contractor license, Class A (any size equipment) or Class B (up to 25 tons cooling or 1.5 million BTU/hour heating).
Utah	DOPL H100 HVAC Contractor license (which replaced the S350 classification — S350 holders in good standing on Jan 1, 2026 are deemed H100 licensees through Nov 30, 2027).
Vermont	Our research did not confirm a state HVAC contractor license separate from the individual trade licenses. Check the Office of Professional Regulation.
Virginia	DPOR contractor license in classes by job value: Class C (over $1,000 to $30,000 per contract), Class B ($30,000 to under $150,000), Class A ($150,000+).
Washington	L&I specialty contractor registration — no exam or qualifier — with a Department of Revenue business registration, a surety bond, liability insurance and a $150.20 fee.
West Virginia	Contractor license from the WV Contractor Licensing Board at $5,000 or more residential or $25,000 or more commercial per job.
Wisconsin	DSPS HVAC Contractor registration — required before anyone installs or services heating, ventilating or air-conditioning equipment (with narrow exemptions).
Wyoming	Our research did not confirm a state HVAC contractor license; contractor licensing is municipal. Check your city.

This page is employer career and business information, not legal advice. Licensing requirements are set by the agencies named above — and by cities and counties where licensing is local. Confirm the current requirements with your state board or local building department before you bid or pull a permit.