Illinois HVAC Technician License: City-Level Rules (No State Board)

Q: Do you need a license to do HVAC work in Chicago?

Yes, but not an 'HVAC license' -- Chicago has none. Chicago's Department of Buildings licenses general contractors, electricians, plumbers, mason contractors, boiler (stationary) engineers, crane operators and elevator mechanics, but there is no HVAC, mechanical or refrigeration trade license on that list. Chicago treats HVAC as a subcontractor type that needs no trade-specific license: a Mechanical (HVAC) permit's required contractor is a licensed general contractor (Class A-E by project cost), and an HVAC subcontractor that wants to be added to a permit must obtain a general contractor license. A homeowner may instead act as their own general contractor by filing an Owner as Contractor form (Form 401).

Illinois does not issue a statewide HVAC technician license — licensing happens at the city level. Who actually licenses HVAC technicians and where to check, verified from official sources.

Requirements at a glance

No Illinois State HVAC license exists (and there is no statewide HVAC registration either): Illinois issues no statewide HVAC, air conditioning, refrigeration, heating or mechanical-contractor license, and it operates no state HVAC board. The Illinois Department of Financial and Professional Regulation (IDFPR) publishes its A-Z list of 'Professions and Industries Regulated by IDFPR' -- it includes Roofing Contractor (and Qualifying Party Roofing Contractor), Architect, Professional Engineer, Structural Engineer, Private Security Contractor and roughly 200 others, but NO HVAC, heating, air conditioning, refrigeration or mechanical-contractor license. Plumbing is licensed by a different state agency: the Illinois Department of Public Health (IDPH), under the Illinois Plumbing License Law (225 ILCS 320), licenses plumbers, plumbing contractors, apprentice plumbers and irrigation contractors. So Illinois does license SOME construction trades at the state level -- roofing (IDFPR) and plumbing (IDPH) -- but HVAC is not one of them. Unlike Pennsylvania, Illinois also has no statewide contractor-registration scheme for HVAC; the Home Repair and Remodeling Act imposes contract-disclosure duties but creates no license or registry (see below).
STATEWIDE - the Home Repair and Remodeling Act is a disclosure law, NOT a license or registration: The nearest statewide law touching residential HVAC work is the Home Repair and Remodeling Act (815 ILCS 513), and it is a consumer-protection/disclosure statute, not a licensing or registration scheme -- there is no state HVAC registry, no state HVAC fee and no state HVAC exam created by it. Section 10 defines 'Home repair and remodeling' to include, by name, 'central air conditioning, central heating, boilers, furnaces,' so HVAC work is squarely within its scope. What it requires is disclosure and a written contract: under Section 15, 'Prior to initiating home repair or remodeling work for over $1,000, a person engaged in the business of ... remodeling shall furnish to the customer for signature a written contract'; under Section 20, for any contract over $1,000 the contractor must give the customer the 'Home Repair: Know Your Consumer Rights' pamphlet before the contract is signed. The Act excludes 'maintenance, service, or repairs under $500,' original construction of single-family or multi-family residences, and repairs to dwellings containing more than 6 apartments or family units. Complying with this Act does not license anyone to do HVAC work -- it governs how the contract is papered, not who may perform the trade.
CHICAGO - there is NO HVAC trade license; HVAC work is authorized under a General Contractor License: Even Chicago -- the state's largest city -- has no HVAC-specific trade license. The Department of Buildings 'administers trade licenses and registrations for more than 23,000 construction industry professionals, including general contractors, supervising electricians, electrical contractors, plumber's apprentices, plumbers, plumbing contractors, mason contractors, stationary (boiler) engineers, apprentice crane operators, crane operators, supervising elevator mechanics, and elevator mechanic contractors' -- there is no HVAC, mechanical or refrigeration trade license on that list. Chicago says so directly: a subcontractor 'not required to have a drain layer contractor license, electrical contractor license, elevator mechanic contractor license, mason contractor license, or plumbing contractor license based on the type of work they are performing (for example, a painting subcontractor or HVAC subcontractor)' is only required to be listed on the permit if it will schedule permit inspections. For a Mechanical (HVAC) permit, the 'Required Contractor' is 'A licensed general contractor (Class A, B, C, D, or E, based on total project cost)' -- and a subcontractor that does not hold one of the trade-specific licenses 'must obtain a general contractor license in order to be listed on or added to a permit.' In short, an HVAC contractor in Chicago holds a General Contractor License; a property owner may instead act as their own general contractor by filing an Owner as Contractor form (Form 401).
CHICAGO - General Contractor License classes, fees and requirements: The Chicago General Contractor License is issued to businesses (including sole proprietorships) and is graded into five classes by the maximum value of concurrent or consecutive regulated activity at a single site: Class A (unlimited), Class B ($20,000,000), Class C ($10,000,000), Class D ($4,000,000) and Class E ($500,000). Calendar-year 2026 fees (the license fee equals the renewal fee): Class A $3,500.00, Class B $1,800.00, Class C $1,300.00, Class D $900.00, Class E $300.00; reinstatement $100.00 per year (or fraction) expired; a license 'is valid for one year from issuance.' Requirements are a completed application, a statement of financial solvency, proof the applicant is authorized to do business in Illinois, government photo IDs for the responsible principals, and commercial general liability insurance sized to the class (Class A $5,000,000 per occurrence, Class B $3,000,000, Class C and D $2,000,000, Class E $1,000,000) from an insurer rated B+ or better -- there is no HVAC trade exam. Applications and renewals are processed by Continental Testing Services on behalf of the Department of Buildings. The license is governed by the Municipal Code of Chicago, Chapter 4-36 (Licensing of General Contractors).
OTHER ILLINOIS MUNICIPALITIES - check the city, village or county where you will work: Chicago is documented here as the example; it is not the whole state. Illinois is a home-rule state, and many municipalities and counties impose their own HVAC contractor registration or licensing, contractor bonds, or permit rules that vary widely -- some register HVAC contractors specifically, some (like Chicago) fold HVAC into a general contractor license, and some require only a permit. These local regimes are NOT captured in this record. Identify the city, village or county where the work will be performed and confirm its requirements before bidding; do not assume the Chicago rules apply elsewhere in Illinois.
FEDERAL (everywhere in IL) - EPA Section 608 refrigerant certification: Separate from every Illinois state law and municipal license: under the Clean Air Act and 40 CFR part 82, subpart F, any technician who maintains, services, repairs or disposes of equipment that could release refrigerant must hold EPA Section 608 certification. This is a FEDERAL credential held by the individual technician; it is neither issued by Illinois nor by any Illinois municipality, and it is not a substitute for a local general contractor or trade license. Calling EPA 608 an 'Illinois HVAC license' is a common error -- it is a federal refrigerant credential, not a state or local occupational license.

Legal basis

Illinois does not license HVAC technicians at the state level.

Illinois does not license HVAC at the state level. There is no statewide HVAC, air conditioning, refrigeration, heating or mechanical-contractor license, no state HVAC board, no state exam and no state fee schedule – and, unlike Pennsylvania, there is not even a statewide contractor-registration scheme for HVAC. The negative is provable against the state agencies that DO license construction trades. The Illinois Department of Financial and Professional Regulation (IDFPR) publishes an A-Z list of the professions it regulates – it licenses Roofing Contractors, Architects, Professional and Structural Engineers, Private Security Contractors and roughly two hundred others, but it does not license HVAC, heating, air conditioning, refrigeration or mechanical contracting. Plumbing is handled by a different agency entirely: the Illinois Department of Public Health (IDPH) licenses plumbers, plumbing contractors and apprentices under the Illinois Plumbing License Law (225 ILCS 320). So Illinois clearly knows how to license a construction trade at the state level – it does so for roofing and for plumbing – and it has chosen not to do so for HVAC.

The closest statewide law that reaches HVAC work is a disclosure statute, not a license. The Home Repair and Remodeling Act (815 ILCS 513) defines ‘home repair and remodeling’ to include ‘central air conditioning, central heating, boilers, furnaces’ (Section 10), and it requires a written contract for residential work over $1,000 (Section 15) and delivery of the ‘Home Repair: Know Your Consumer Rights’ pamphlet (Section 20). But it creates no license, no registry, no fee and no exam; it governs how a residential job is papered, not who may perform the trade. (This is the sharp contrast with Pennsylvania, whose Home Improvement Consumer Protection Act does require statewide REGISTRATION.)

Because there is no state credential, HVAC is licensed below the state – and the biggest example proves how thin even the local picture can be. The City of Chicago Department of Buildings licenses general contractors, electricians and electrical contractors, plumbers and plumbing contractors, mason contractors, stationary (boiler) engineers, crane operators, and elevator mechanics and contractors – and NOT ONE of those is an HVAC, mechanical or refrigeration trade license. Chicago treats HVAC as a subcontractor type that needs no trade-specific license: a Mechanical (HVAC) permit’s ‘Required Contractor’ is a licensed general contractor (Class A through E, based on total project cost), and an HVAC subcontractor that wants to be added to a permit ‘must obtain a general contractor license.’ A property owner may instead act as their own general contractor by filing Form 401. The General Contractor License is a business license graded by project value (Class A unlimited down to Class E at $500,000), priced from $300 to $3,500 per year for 2026, requiring financial-solvency and insurance proof but no HVAC trade exam, and governed by Municipal Code of Chicago Chapter 4-36.

The rest of Illinois is not covered here. Illinois is a home-rule state and its municipalities and counties set their own HVAC contractor registration, bonding and permit rules, which differ from town to town. Identify the local jurisdiction where the work will be performed and confirm its requirements. And separately from every Illinois state or local rule, EPA Section 608 refrigerant certification is a FEDERAL requirement (40 CFR part 82, subpart F), held by the individual technician, that applies everywhere in Illinois and is not a state or local HVAC license.

What it’s called

Illinois does not license HVAC technicians or contractors at the state level, and it has no statewide HVAC registration, so there is no ‘Illinois HVAC license’ to issue. A search for one maps to a LOCAL credential in the city, village or county where the work is performed – and in Chicago, the state’s largest city, that credential is a General Contractor License (there is no HVAC-specific license), or a homeowner acting as their own general contractor. Do not confuse HVAC with the trades Illinois DOES license statewide: roofing (IDFPR) and plumbing (IDPH), which are separate credentials. Separately, the federal EPA Section 608 refrigerant certification is a nationwide requirement held by the individual technician – it is NOT an Illinois or municipal HVAC license, though it is often loosely called one. ‘HVAC license,’ ‘AC license,’ ‘mechanical license’ and ‘HVAC certification’ are informal names people use for whichever local credential applies.

Who does NOT need a license — exemptions

Illinois has no statewide HVAC trade license, so there is no statewide licensing exemption to enumerate – there is simply nothing at the state level to be exempt from. Two things bound the picture instead. FIRST, the statewide Home Repair and Remodeling Act (815 ILCS 513) is a disclosure law, and its Section 10 definition sets its own scope limits rather than licensing exemptions: ‘home repair and remodeling’ means residential work ‘other than maintenance, service, or repairs under $500’; it ‘does not include the sale, installation, cleaning, or repair of carpets; the repair, installation, replacement, or connection of any home appliance … when the persons replacing, installing, repairing, or connecting the home appliance are employees or agents of the merchant that sold the home appliance or sold new products of the same type; or landscaping’; and ‘This Act does not apply to original construction of single-family or multi-family residences or repairs to dwellings containing more than 6 apartments or family units.’ Those limit when the written-contract and pamphlet duties attach – they do not exempt anyone from an HVAC license, because the Act creates none. SECOND, the operative carve-outs are LOCAL. In Chicago, where HVAC work runs through the General Contractor License, a property owner may perform the work by acting as their own general contractor (filing an Owner as Contractor form, Form 401) rather than hiring a licensed one; and an HVAC subcontractor ’not required to have’ one of Chicago’s trade-specific licenses (drain layer, electrical, elevator mechanic, mason or plumbing contractor) ‘based on the type of work they are performing’ need only be listed on the permit, and only if it will schedule permit inspections – otherwise it need not appear at all. Any HVAC contractor that wants to be added to a Chicago permit, however, must hold a general contractor license. Other Illinois municipalities set their own exemptions; this record documents only Chicago, so confirm the carve-outs of the jurisdiction where the work is performed.

Where to get licensed

There is no statewide Illinois HVAC board to call, and no state HVAC license or registration to obtain. Do three things.

FIRST, know what the state does and does not do: the Illinois Department of Financial and Professional Regulation (IDFPR) licenses roofing contractors but not HVAC; the Illinois Department of Public Health (IDPH) licenses plumbers (225 ILCS 320) but not HVAC. Do not go looking for a state HVAC license – there isn’t one.

SECOND, comply with the statewide disclosure law if you do residential work: the Home Repair and Remodeling Act (815 ILCS 513) requires a written contract for any residential job over $1,000 and delivery of the ‘Home Repair: Know Your Consumer Rights’ pamphlet before the contract is signed. This is a contract/disclosure duty, not a license.

THIRD, get the LOCAL credential where you will work. IN CHICAGO there is no HVAC trade license: HVAC work is performed under a General Contractor License from the Department of Buildings (processed by Continental Testing Services), graded Class A-E by project value, $300-$3,500 for 2026, requiring financial-solvency and class-sized insurance proof but no HVAC exam; a homeowner may instead file an Owner as Contractor form (Form 401). FOR EVERY OTHER ILLINOIS CITY, VILLAGE OR COUNTY, contact that local building/licensing department directly – Illinois home-rule municipalities set their own HVAC contractor registration, bond and permit rules, and this record does not cover them.

EVERYWHERE IN ILLINOIS: if your work involves refrigerants, obtain EPA Section 608 certification – a FEDERAL credential (40 CFR part 82, subpart F), held by the individual technician, separate from every Illinois state law and municipal license above.

Frequently asked questions

Does Illinois require a state HVAC license?

No. Illinois issues no statewide HVAC, air conditioning, refrigeration, heating or mechanical-contractor license and operates no state HVAC board. The Illinois Department of Financial and Professional Regulation (IDFPR) licenses roofing contractors, and the Illinois Department of Public Health (IDPH) licenses plumbers under the Illinois Plumbing License Law – but neither licenses HVAC. Illinois also has no statewide HVAC registration. The credential you need is issued by the city, village or county where you work.

If there's no state HVAC license, what statewide rules apply to residential HVAC work in Illinois?

The Home Repair and Remodeling Act (815 ILCS 513) applies. It defines ‘home repair and remodeling’ to include ‘central air conditioning, central heating, boilers, furnaces,’ and it requires a written contract for any residential job over $1,000 and delivery of the ‘Home Repair: Know Your Consumer Rights’ pamphlet before the contract is signed. It is a consumer-protection and contract-disclosure law – it does not license anyone to perform HVAC work and creates no state registry or fee.

Do you need a license to do HVAC work in Chicago?

Yes, but not an ‘HVAC license’ – Chicago has none. Chicago’s Department of Buildings licenses general contractors, electricians, plumbers, mason contractors, boiler (stationary) engineers, crane operators and elevator mechanics, but there is no HVAC, mechanical or refrigeration trade license on that list. Chicago treats HVAC as a subcontractor type that needs no trade-specific license: a Mechanical (HVAC) permit’s required contractor is a licensed general contractor (Class A-E by project cost), and an HVAC subcontractor that wants to be added to a permit must obtain a general contractor license. A homeowner may instead act as their own general contractor by filing an Owner as Contractor form (Form 401).

What does the Chicago General Contractor License cost, and what does it require?

It is a business license graded by the maximum value of work at one site: Class A (unlimited), B ($20 million), C ($10 million), D ($4 million), E ($500,000). Calendar-year 2026 fees run from $300 (Class E) to $3,500 (Class A), with the renewal fee equal to the license fee, and the license is valid for one year. You must submit a completed application, a statement of financial solvency, proof you are authorized to do business in Illinois, government photo IDs, and commercial general liability insurance sized to your class (Class E $1 million per occurrence up to Class A $5 million) from an insurer rated B+ or better. There is no HVAC trade exam. Applications and renewals are processed by Continental Testing Services.

How do HVAC contractors get licensed elsewhere in Illinois?

Through the local jurisdiction, and it varies. Illinois is a home-rule state, so cities, villages and counties set their own HVAC contractor registration, bonding and permit rules – some register HVAC contractors by trade, some (like Chicago) fold HVAC into a general contractor license, and some require only a permit. This record documents Chicago as the example and does not cover other localities; contact the building or licensing department where you will work and confirm before bidding.

Is EPA 608 the same as an Illinois HVAC license?

No. EPA Section 608 certification is a FEDERAL credential under the Clean Air Act (40 CFR part 82, subpart F), required of any technician who could release refrigerant while servicing equipment. It is held by the individual technician and applies everywhere in Illinois, but it is not issued by Illinois or any Illinois city and does not substitute for a local general contractor or trade license.

See every license and certification LicensingAtlas covers in Illinois.

Sources & verification

Last verified against these sources: July 23, 2026.

LicensingAtlas states licensing and certification requirements categorically from official sources. It is a reference, not legal or career advice, and requirements change frequently — confirm details with the issuing board before you act.

Requirements at a glance

What it’s called

Who does NOT need a license — exemptions

Where to get licensed

Frequently asked questions

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