New York · HVAC licensing · official-source guide
New York does not license HVAC contractors at the state level. Licensing happens locally. New York City's Department of Consumer and Worker Protection issues the Home Improvement Contractor license required for residential work over $200, Nassau, Suffolk, Westchester, Putnam and Rockland counties run their own, and Buffalo licenses heating contractors through a Board of Heating Examiners.
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Verify a licenseVerified against agency sources on 2026-09-14. Rules and fees change; confirm with the named authority before relying on this guide.
New York State does not issue a statewide HVAC, mechanical or refrigeration contractor license. There is no state HVAC board and no state trade exam. Licensing sits with cities and counties, and the rules change when you cross a county line. Suffolk County's own homeowner guidance says home improvement contractors must be licensed in New York City, Suffolk, Nassau, Westchester, Putnam and Rockland counties. Those six jurisdictions cover the downstate market. Upstate the pattern differs again. Buffalo runs a Heating Contractor License through a Board of Heating Examiners inside its Department of Permit and Inspection Services, while many smaller municipalities touch the work only through building permits and code inspection. For an HVAC company the practical result is that your license is a map, not a single credential. A furnace changeout in Hempstead runs on a Nassau County home improvement license. The same job in Huntington runs on a Suffolk County one. The same job in Queens runs on a New York City Department of Consumer and Worker Protection license. None of the three transfer. Companies that sell across Long Island and the five boroughs routinely carry three licenses, three renewal dates and three separate insurance filings, and each agency can fine them independently. Before you quote work in a town you have not served, check the county first and the city second. No state license does not mean no enforcement. It means enforcement is local, and the local office is the one that can fine you, seize tools or pull you off a job site.
Sourcessuffolkcountyny.gov 1buffalony.gov 2portal.311.nyc.gov 3
In the five boroughs the license that matters for residential HVAC is the Home Improvement Contractor license from the Department of Consumer and Worker Protection. DCWP states that a person or business must hold this license to do construction, repair, remodeling or other home improvement work on any residential land or building in New York City. NYC311 puts a dollar figure on it: any contractor performing home improvement work costing more than $200 must have a DCWP license to operate legally in the city. Almost every residential furnace, boiler, heat pump, ductless split or ducted air conditioning job clears that threshold, which means the license is not optional for a company that answers residential calls. DCWP licenses more than 45,000 businesses across more than 40 industries, and home improvement is one of the most heavily enforced. The license is issued to the business, not to a technician. A sole proprietor, general partner, corporate officer, principal, director, member or shareholder owning ten percent or more of company stock carries the qualifying role. Employees of a licensed contractor do not need their own license. The license does not authorize gas piping, electrical work or anything else the city licenses separately, and it does not replace a Department of Buildings permit. Treat it as the ticket that lets you contract directly with a homeowner in New York City, and then look at what the Department of Buildings and the Fire Department require on top of it for the specific equipment you are installing.
DCWP publishes a document checklist and will deny an application that arrives short. You need a Sales Tax Identification Number or an application confirmation number, obtained through the state business express portal, because a home improvement contractor collects sales tax. You need proof of business address and proof of home address for every individual listed, each satisfied by a utility bill dated within the last 90 days, a lease or deed, a current rent or mortgage bill, a government agency letter, an active government license, or a bank or credit card statement dated within the last 90 days with account numbers redacted. Workers compensation proof is specific and trips people up: DCWP wants an insurance certificate from a private carrier or the New York State Insurance Fund naming the Department of Consumer and Worker Protection as certificate holder at 42 Broadway, New York, NY 10004, or a Certificate of Attestation of Exemption from the New York State Workers Compensation Board. ACORD forms are explicitly not accepted as proof of New York State workers compensation coverage. You also file proof of EPA Renovation, Repair and Painting certification and EPA Lead Based Paint Activities certification, or a signed Home Improvement Contractor Affirmation stating that one or both are not required for the work you perform. A signed Contractual Compliance Agreement goes in with the package. Corporations, LLCs and limited partnerships must be registered and active with the New York State Division of Corporations, and sole proprietors trading under another name need an assumed name certificate.
Sourcesnyc.gov 1wcb.ny.gov 2
One qualifying person takes the Home Improvement Exam: a sole proprietor, general partner, corporate officer, principal, director, member or shareholder owning ten percent or more of company stock. Only one of those people needs to pass, and DCWP wants you to confirm with them who is sitting for it. You cannot schedule until DCWP has received and processed your documents and fees. Once the application is processed it takes about 24 hours for your record to reach ExamBuilder, the testing vendor, and from the moment your information appears there you have 60 days to take and pass. The exam is 30 questions and you must answer at least 21 correctly to pass. The license application fee covers up to two attempts. Fail twice and you pay $50 to retake, and that $50 buys two more attempts. Test centers operate citywide from 9:00 a.m. to 5:00 p.m. seven days a week, and you can book online through the DCWP scheduling site or by phone. DCWP publishes a Home Improvement Examination Guide in more than a dozen languages, including Spanish, Chinese, Russian, Haitian Creole, Bengali, Korean, Polish, Arabic and Urdu. Separately, every sole proprietor, general partner, corporate officer, principal, director, member and every shareholder owning more than ten percent of company stock must be fingerprinted through IdentoGO using service code 1585BH, entering the numeric portion of the application number as the agency identifier. Book the fingerprint appointment early, because it is a common cause of stalled applications.
Sourcesnyc.gov
The DCWP Home Improvement Contractor license runs on a two year period that expires on February 28 in odd numbered years, and the fee you pay depends on where in that cycle you apply. Apply between March 1 and August 31 of an odd year and you pay $200 for a license valid at most 24 months. Apply between September 1 of an odd year and the end of February in the following even year and you pay $150 for at most 18 months. Apply between March 1 and August 31 of an even year and you pay $100 for at most 12 months. Apply between September 1 of an even year and February 28 of an odd year and you choose: $50 for a license valid at most six months, or $250 for one valid at most 30 months. Every one of those options expires on February 28 of the next odd year, so the fee is really a proration. The long option is worth the arithmetic if you are applying late in an even year, because $250 buying 30 months beats paying $50 now and a full fee again within half a year. DCWP takes credit card, eCheck, or check and money order made out to DCWP. Paying by card adds a nonrefundable two percent convenience fee. Applications are filed online; in person licensing appointments are reserved for hardship cases. Calendar the February 28 expiration the day you are licensed, because the renewal date does not move to match your issue date.
Sourcesnyc.gov
Every New York City home improvement contractor has to back the work financially, and DCWP gives you two routes. The first is the Home Improvement Business Trust Fund. You complete a Trust Fund Enrollment Form and pay $200 to join. DCWP notes that participants who stay in the Fund do not pay again at renewal if the Fund held more than $2 million as of July of the prior year, which makes enrollment the cheaper long run choice for most small HVAC shops. The second route is a $20,000 surety bond or third party bond, properly signed, with the Department of Consumer and Worker Protection named as certificate holder. If you bond, your corporate name, any doing business as name and your premises address must match exactly across every document, and you submit a bond receipt showing the bond is paid in full and does not expire before the end of the licensing period. DCWP publishes a list of bonding companies but does not endorse any of them. The choice matters for an HVAC company because a consumer with a judgment against a Trust Fund participant can recover from the Fund, while a bonded contractor deals with a surety that will come back for reimbursement. Whichever route you pick, this is separate from your general liability policy and separate from workers compensation. It is a consumer restitution mechanism, not insurance for your business.
Sourcesnyc.gov
A DCWP license lets you sell the job. A Department of Buildings permit lets you do it. DOB requires the Home Improvement Contractor license and number when a contractor pulls a permit for Alteration 1, 2 and 3 applications on one to four family homes, co-op units, condominium units and rented apartment units. On the PW2 permit form, Section 6 asks whether the work requires an HIC license; answer yes and you supply the license number and present the license or a copy to the permit clerk for validation. An HIC1 affidavit can waive the requirement where it applies. Local Law 21 of 1968, codified at Section 20-397, exempts licensed plumbers, architects, engineers and anyone else required by state or city law to hold a license, when the work is exclusively inside the scope of what they are licensed for. DOB also lists the specific exclusions: subcontractors, homeowners doing their own work, new building work, work in a residence owned or controlled by a government agency, work only in the commercial portion of a building, and work in a multiple dwelling where you were hired by the owner or board of directors. Read the DOB license list and you will notice there is no HVAC or mechanical contractor license. What is there matters to heating work: Plumbing and Fire Suppression at master and journeyman level, Gas Work Qualification, Oil Burner Equipment Installer, High Pressure Boiler Operating Engineer, Welder and General Contractor Registration. Gas fired equipment pulls you into the plumbing and gas qualification rules whether or not you think of yourself as a plumber. All new license applications and renewals are filed online through DOB NOW.
Commercial refrigeration and larger air conditioning in New York City brings in the Fire Department. FDNY requires a permit to maintain or operate a refrigerating system that uses a group A1, A2, A3, B1, B2 or B3 refrigerant, or is mounted on or suspended from a roof or ceiling, or is floor mounted with a compressor of 5 horsepower or more. The permit costs $105 per compressor, and an FDNY inspector visits the premises annually before the permit expires. Roof mounted and ceiling suspended systems also need an Equipment Use Permit or other approved documentation from the Department of Buildings. Above certain sizes the system must be watched by someone holding a Certificate of Qualification for Refrigerating System Operating Engineer, the Q-01. FDNY sets those thresholds at a Group A1 system with a compressor of 50 horsepower or more, any system using 200 pounds or more of A2, A3 or B1 through B3 refrigerant, or a non automatic system using 50 pounds or more of those refrigerants. The Q-01 is site specific and the Fire Code table governs whether the system needs personal supervision, meaning the holder is in the building whenever it runs, or general supervision, meaning it does not. To sit for it you bring proof of a 200 hour Refrigerating System Operating Engineer course from an FDNY certified school or a letter verifying one year of practical experience, a Universal Technician Certificate, a high school diploma or GED and two forms of identification. There is a written exam and then a practical exam carrying a $225 fee, plus $60 for each additional Certificate of Qualification card when you register more than one work location.
Nassau County Consumer Affairs licenses contractors who perform remodeling on residential homes in the county. Work only on commercial buildings and you do not need it. Employees of licensed contractors are exempt, as are plumbers, electricians, architects and professional engineers working solely within the field they are already licensed for, which is the standard of competency exemption. You must be at least 18. The bar Nassau sets is experience: five years of recent, relevant, verifiable experience, plus proof of good moral character and financial responsibility, proof that you are the real owner holding title to the business, and an actual establishment at a definite location inside New York State. A telephone answering service does not count as a location, so out of state HVAC companies need a genuine office or shop in the state. The fee is $650 for a two year license, plus a one time mandatory $50 contribution to the Home Improvement Restitution Fund. Insurance is required: certificates of liability and property damage plus workers compensation covering employees. A bond may be required in certain circumstances. Licenses run two years. A renewal filed 15 days after expiration draws a $110 late fee, and you can renew up to three months late with that fee; past three months you sit down with the Commissioner and counsel, and past one calendar year no renewal is allowed at all. A supplementary license for each additional Nassau place of business costs $110, and a duplicate costs $60. You may not start work and you may not advertise until the license is actually in hand.
Sourcesnassaucountyny.gov
Suffolk County licenses through the Department of Labor, Licensing and Consumer Affairs, which licenses over 15,000 vendors and reports that more than half of the licenses it issues or renews each year are home improvement licenses. The county code puts the term at two years from the date of issuance, expiring on the last day of the 24th month, with renewals in two year blocks. The insurance figure is written into the law: the Director may require certificates of public liability and property damage insurance at $500,000 per occurrence combined single limit, and may require a surety bond in an amount set by the Director but never more than $100,000. All certificates of public liability, property damage and workers compensation go to the office before the license is first issued and again whenever you change carrier; at renewal you file either a sworn affidavit that coverage is in force or a fresh certificate. Administrative fees are set out in the same chapter: $25 to amend a license, $25 for a duplicate, $50 per annum for a supplementary license, and $50 to shelve a license for a period not to exceed three years, which is useful if you step away from the Suffolk market for a season. Suffolk also requires the licensee to give the consumer, in writing on the contract or paid receipt, the service employee's name, the business name, address, telephone number and county license number, and the same details for every subcontractor employee on the job.
Westchester County law requires home improvement contractors to hold a county license, issued by the Department of Consumer Protection, which maintains the public list of licensed contractors and a separate published list of what it calls renegade renovators that consumers are told to avoid. Westchester raised its fees effective January 1, 2026, and the department warns that any application accepted after that date must reflect the new schedule. The Home Improvement License application fee is $750. Expedited processing costs $100. A renewal application filed late carries a $50 fee. Vehicle decals are $10 each, which matters for an HVAC company running a fleet, because each truck needs one. A replacement or duplicate certificate is $50. The county runs separate licensing for plumbers and electricians, so a mechanical company that also touches gas piping or line voltage work needs to check whether the individual doing that work holds the right county credential. Westchester adds a disclosure requirement that catches financed installs: if a home improvement contractor directly or indirectly arranges or facilitates the financing of the contract, the contractor must complete a disclosure form explaining the connection to the financing. That applies squarely to HVAC replacements sold with lender programs. The department also points contractors to the federal lead rule, since work disturbing lead based paint in homes built before 1978 requires EPA certification and lead safe work practices. Applications and the licensing law are downloadable in English and Spanish, and the licensing office answers questions by phone.
Sourcesconsumer.westchestercountyny.gov 1consumer.westchestercountyny.gov 2consumer.westchestercountyny.gov 3
Western New York runs on a different rule. The City of Buffalo, through the Office of Fuel Devices inside the Department of Permit and Inspection Services, issues a Heating Contractor License under Section 238-9, Article II of Chapter 238 of the Code of the City of Buffalo. The license covers engaging in the business of installing, contracting to install, altering, repairing or servicing heating equipment, and the license holder is qualified to install or service equipment using gas or solid fuels. This is a genuine trade license, not a consumer registration, and the gatekeeper is a Board of Heating Examiners. To apply you submit the application with a copy of photo identification, letters from past and present employers stating your length of service and job duties, and a list of twenty installation jobs you have completed, each with the customer name, address and telephone number. The board reviews that package at its next meeting and decides whether you qualify to sit for the Heating Contractor Examination. You are notified in writing. The testing fee is $50 and is non refundable. The license fee is $500, and the license renews each year for $500, which makes Buffalo an annual renewal market rather than the two year cycle used downstate. A license holder must present certificates of General Liability insurance for $1,000,000 and workers compensation. Applications go to the Division of Fuel Devices at City Hall, Room 312. Plan for the twenty job list before you apply, because assembling verifiable customer references after the fact is what slows most applicants down.
Sourcesbuffalony.gov
New York City is explicit: advertising must include the home improvement contractor's DCWP license number, under 6 RCNY 2-222(a). That covers your website, your truck lettering, your direct mail and your paid search ads. The contract has its own list under 6 RCNY 2-221(a)(1): date of the contract, contractor name, office address, telephone number and DCWP license number. The contract must be legible and in plain English, and if you negotiated it in another language you must give the consumer a copy in both English and that language. DCWP's inspection checklist warns that each missing contract requirement is a separate violation with its own penalty, so a template missing three items is three violations on one job. Under 6 RCNY 2-222(r) you cannot advertise benefits that are not based on known and provable facts, and DCWP's own example is an energy savings percentage claim, which is exactly the claim HVAC marketing reaches for. Under 6 RCNY 2-223(b) you keep contracts and related business records for six years, longer if a guarantee runs longer. Suffolk County law is equally direct: all advertising for home improvement contracting shall contain the number of the home improvement license issued under the chapter. Nassau County requires the license to be conspicuously displayed in your place of business with a copy in each vehicle, forbids advertising before the license is approved, and treats false, deceptive and misleading advertising as a violation. Fix your ad templates once, per jurisdiction, rather than per campaign.
No New York license replaces federal refrigerant certification. EPA regulations at 40 CFR Part 82, Subpart F, issued under Section 608 of the Clean Air Act, require that technicians who maintain, service, repair or dispose of equipment that could release refrigerants be certified, and the certification comes from passing an EPA approved test administered by an EPA approved certifying organization. EPA defines a technician broadly enough to catch routine work: attaching and detaching hoses and gauges to measure pressure in an appliance, adding refrigerant to or removing refrigerant from an appliance, and any other activity that violates the integrity of a small appliance or a motor vehicle air conditioner style appliance. There are four certification types. Type I covers servicing small appliances. Type II covers servicing or disposing of high and very high pressure appliances other than small appliances and motor vehicle systems. Type III covers low pressure appliances. Universal covers all types of equipment. The credentials do not expire, so this is a one time hurdle rather than a renewal item. One detail catches people: a core test taken open book cannot be used toward Universal certification, because the core must be proctored to count. Apprentices are exempt while closely and continually supervised by a certified technician. EPA does not issue the cards; the certifying organization does. In New York City the federal rule reaches straight into a city credential, since FDNY requires a Universal Technician Certificate among the documents for the Q-01 Refrigerating System Operating Engineer exam.
The penalties are local and they are real. Nassau County calls working without a home improvement license a Class A misdemeanor punishable by a fine of up to $5,000 and up to one year in jail, plus seizure of vehicles and tools. Suffolk County's chapter lets the Director impose a civil penalty of up to $750 for a first violation and $1,500 for any subsequent violation, or suspend or revoke a license, and a conviction under the chapter is a misdemeanor carrying a fine of not more than $5,000 or imprisonment of not more than one year, with each violation treated separately. Suffolk states that unlicensed contractors are subject to arrest and prosecution. Nassau also treats failure to display the license, doing business under a name other than the licensed one, and failing to report a suspension in another jurisdiction within ten days as violations in their own right. Verification runs the other way and homeowners are told to use it. DCWP publishes a free license search that needs no login or account, along with a Wall of Shame listing unlicensed home improvement contractors. Suffolk County runs a public search of contractors with valid licenses and takes verification calls at its Consumer Affairs number. Westchester County publishes a find a licensed contractor tool alongside its renegade renovators list. Nassau County Consumer Affairs answers license questions by phone. Assume every serious residential prospect in these counties checks before they call, and make your license number easy to find.
Sourcesnassaucountyny.gov 1suffolkcountyny.gov 2suffolkcountyny.gov 3nyc.gov 4consumer.westchestercountyny.gov 5ca.suffolkcountyny.gov 6
These are common details other guides publish about New York, but we could not verify them from the agency source. Confirm them directly before relying on them.
No. There is no statewide HVAC, mechanical or refrigeration contractor license and no state HVAC board. Authority sits with counties and cities. Downstate, home improvement contractor licensing runs through New York City and the counties of Nassau, Suffolk, Westchester, Putnam and Rockland. Upstate, Buffalo issues its own Heating Contractor License.
Yes, if the job is residential. NYC311 states that any contractor performing home improvement work costing more than $200 needs a Department of Consumer and Worker Protection license to operate legally in New York City, and a residential furnace replacement is well over that. You may also need a Department of Buildings permit and gas work qualification.
Suffolk County's homeowner fact sheet names six jurisdictions where home improvement contractors must be licensed: New York City, Suffolk, Nassau, Westchester, Putnam and Rockland. Working across county lines on Long Island or in the lower Hudson Valley means holding more than one license, since none of them recognize each other.
The license period is two years and every license expires on February 28 in an odd numbered year, no matter when it was issued. The fee is prorated to that date, which is why applying in different months costs different amounts. Put the February 28 date on your calendar the day you are licensed.
You need one or the other. Either enroll your business in the Home Improvement Business Trust Fund for a $200 fee, or file a copy of a properly signed $20,000 surety bond or third party bond naming the Department of Consumer and Worker Protection as certificate holder, with a receipt showing it is paid in full.
It is 30 questions and you need at least 21 correct to pass. Your application fee covers two attempts; a third and fourth attempt cost $50 together. You have 60 days to pass once your record reaches the testing vendor. DCWP publishes a free examination guide in more than a dozen languages.
Nassau charges $650 for a two year license plus a one time mandatory $50 contribution to the Home Improvement Restitution Fund. A renewal filed more than 15 days after expiration adds a $110 late fee. Each additional Nassau place of business needs a supplementary license at $110, and a duplicate license costs $60.
Five years of recent, relevant, verifiable experience. Nassau also asks for proof of good moral character and financial responsibility, proof that you are the real owner with title to the business, and an actual establishment at a definite location in New York State. A telephone answering service does not satisfy the location requirement.
Yes. The Office of Fuel Devices issues a Heating Contractor License under Chapter 238 of the Buffalo city code, and a Board of Heating Examiners decides who may sit for the exam. You submit employer letters and a list of twenty completed installations. Testing costs $50, the license costs $500, and it renews annually for $500.
When it uses a group A1, A2, A3, B1, B2 or B3 refrigerant, or is mounted on or suspended from a roof or ceiling, or is floor mounted with a compressor of 5 horsepower or more. The permit is $105 per compressor and an FDNY inspector performs an annual inspection before it expires.
No. EPA states that Section 608 Technician Certification credentials do not expire. Watch one detail: a core test taken as an open book exam cannot be used toward Universal certification, because the core must be proctored for that. Apprentices are exempt while closely and continually supervised by a certified technician.
In New York City, yes. Rule 6 RCNY 2-222(a) requires advertising to include your DCWP license number, and that covers websites, vehicle lettering and paid ads. Suffolk County law requires the number in all home improvement advertising too. Nassau County bars you from advertising at all until the license is approved.
We can review the local market, your current search visibility, and paid-search fit before recommending any marketing work.