Quick Reference Table for HVAC License Requirements in Illinois
Item | Details |
|---|---|
License type | Municipal HVAC (e.g., Mechanical Contractor, Refrigeration, Stationary Engineer) |
Regulating agency | Local government (city/village/county); IDFPR only for adjacent trades |
Experience required | Varies by municipality (e.g., 4 years practical or trade school +1 year, Normal) |
Exam required | EPA Section 608 (federal); municipal written/practical (e.g., ICC exam in Normal, Chicago refrigeration exam) |
Renewal | Annual or biennial (local rule); CE rarely required |
Continuing Education | Generally not required, but check local codes |
Fees | Chicago: Refrigeration exam ~$200 (as of June 2026, verify), License $75; |
Official links | Illinois Municipal Code | IDFPR | Chicago HVAC Licensing | Joliet HVAC Licensing |
Who Needs a License in Illinois?
If you plan to install, service, or maintain HVAC systems in Illinois, you need a license from the local municipality where the work happens. There is no statewide HVAC contractor license under Illinois law. Each city or village determines whether an HVAC contractor’s license is required and what standards apply. The Illinois Municipal Code (65 ILCS 5/11-32-1) gives municipalities the power to license, exam, and regulate HVAC companies, not the Illinois Department of Financial and Professional Regulation.
This means that any work involving heating, air conditioning, or commercial refrigeration (for example, installation of rooftop AC or new furnace) requires you to meet local licensing rules. For most municipalities, these rules apply to both individuals and companies acting as the HVAC contractor. Employees who do not own the business typically do not need their own local HVAC license, but must still be certified at the federal level to handle refrigerants. In contrast, the responsible party or business owner must be the named license holder for the company.
There are exemptions. For example, private utility companies working on their own equipment, LPG dealers regulated separately by the State Police, and licensed plumbers and electricians working within their own trade are typically exempt. However, any commercial work on HVAC systems in residential, commercial, or industrial buildings will generally trigger the need for a municipal HVAC contractor license under current HVAC license requirements in Illinois.
HVAC License Types
There is no universal Illinois HVAC contractor license type. Each city sets its own license categories, requirements, and scope. For example, Chicago offers several different license types such as Refrigeration Contractor, Mechanical Contractor, and Stationary Engineer. In Joliet and Normal, the most common is a general HVAC or Mechanical Contractor license. Separate categories may exist for different system types or project sizes.
Most HVAC license requirements in Illinois distinguish between residential and commercial systems, with some municipalities providing more detailed license designations. For example, Chicago differentiates mechanical versus refrigeration contractors. These categories may affect which permits you can pull, what work you can bid on, and details like insurance or bonding thresholds. You should always confirm the exact category needed with the local code office before starting work.
For projects involving adjacent trades (such as tying HVAC into plumbing or running new electrical circuits), you may also need an Illinois plumbing or electrical license, both of which are administered by IDFPR, not the local municipality. However, these are separate from the primary HVAC license requirements in Illinois itself.
How to Get Licensed in Illinois
To meet HVAC license requirements in Illinois, you must follow the application and licensing process set by each jurisdiction. Here is a typical process, using requirements common to cities like Chicago, Joliet, and Normal:
Check local rules: Review HVAC contractor requirements for your target city or county.
Obtain EPA Section 608 Certification: You must have federal certification if you will handle refrigerants.
Gather experience documents: Prepare affidavits or employment records that prove your years of practical HVAC work or relevant trade schooling.
Fill out local license application: Get the form from the municipal website or code office. For example, Normal offers its application through the Building Department’s HVAC Inspector.
Pay the application fee: Submit the required fee with your application (Joliet, $100 annually as of June 2026; Normal, $50).
Register for and schedule the required exam: Some municipalities use ICC or local exam boards. EPA 608 must be passed at the federal level through an approved provider.
Pass the local license exam: Exams typically cover mechanical codes, safety, regulations, and HVAC calculations.
Submit proof of insurance and bond: Insurance certificates and surety bonds are normally required before a license will be issued.
Receive municipal license approval: The city or village issues your official HVAC contractor license, and you are added to the list of permit-eligible contractors for that location.
Renew your license as required: Most cities require annual or biennial renewal with fee payment and maintenance of insurance.
Timelines vary, but it can take from several days to several months. Chicago lists a 10 to 18 week range for some categories. Always track all submission dates and renewal periods for your jurisdiction.
Online Versus In-Person Application
Many cities now accept license applications online, while others require paper forms or in-person drop-off at the municipal building department. Unlike state-licensed trades in Illinois, there is no statewide online portal for HVAC license requirements in Illinois. Each city or county manages their own process.
Application Requirements for HVAC License Requirements in Illinois
Each municipality in Illinois sets its own application requirements for HVAC licensing. However, there are some common standards across most jurisdictions. Here is what you can typically expect to need under HVAC license requirements in Illinois:
Experience and Age
Most municipal HVAC licenses require you to be at least 18 years of age. Experience requirements vary. For instance, in the Village of Normal, you need four years of actual field experience or one year of trade schooling plus one additional year in the field (as of June 2026, verify here).
Experience must often be proven by documentation. This may include affidavits from prior employers, signed forms, or apprenticeship records. You should prepare these documents in advance.
EPA Certification
The federal EPA Section 608 Technician Certification is required for any technician handling refrigerants in Illinois. This is a nationwide standard under the Clean Air Act, and you must pass the Core exam plus one or more specialty types (Type I, II, III, or Universal). EPA 608 is required in every city, even if you are only seeking local HVAC licensing.
Insurance and Bond
General liability insurance and a surety bond are often required. For example, the City of Chicago enforces specific insurance and bonding requirements by license category, and Joliet requires submission of a current certificate of insurance. The required limits and forms may be listed in each city’s application packet. If you skip this step, your license application will be rejected or delayed.
Letters of Intent and Other Documentation
Some cities, such as Joliet, will require a Letter of Intent for each project you plan to bid. Others mandate a detailed list of personnel or sub-contractors. Always check your target city’s documentation list before applying, as missing documents are the leading cause of permit and license delays under HVAC license requirements in Illinois.
Background Check or References
Some municipalities (though not all) require a background check or character references. LegalClarity cites a minority of Illinois cities as requiring criminal history checks or professional references. When required, these must be included with your application and fees.
Exams for HVAC License Requirements in Illinois
There are two levels of examination for HVAC license requirements in Illinois: federal (EPA Section 608) and local municipal (city or county) exams for contractor licensing.
EPA Section 608 Certification
This is a mandatory EPA proctored exam for any technician working with regulated refrigerants. You must pass the Core exam (25 questions, minimum 18 correct answers) and one or more specialty sections (Type I, II, III, or Universal). Exam providers include ESCO Institute and NATE, with proctored locations and online testing available nationwide.
Municipal HVAC License Exams
Cities often require you to pass a written or practical exam. For example, Normal mandates the International Code Council (ICC) Standard Master Mechanical Exam. Chicago requires refrigeration contractors to pass their own specific written exam and charges about $200 (as of June 2026, verify exam fee here). Exam content covers code compliance, mechanical systems design, safety, and related trade knowledge.
Joliet proctors its exam Monday to Friday mornings, with no separate exam fee listed from the license registration. Passing scores, retake policies, and waiting periods are set by the city. Always ask for an exam bulletin from your local municipal authority.
Fees
There are no statewide HVAC license or exam fees in Illinois, as there is no state-issued license. All fees are set at the local municipal level. Current example fees under HVAC license requirements in Illinois include:
Chicago: Refrigeration Contractor written exam fee is approximately $200 (as of June 2026, verify at Contractor License Requirements roadmap). The Stationary Engineer license is $75 initial for two years, and $150 per exam attempt.
Joliet: $100 annual HVAC contractor registration fee (as of June 2026, verify at Joliet.gov).
Normal: $50 HVAC mechanical contractor application fee (as of June 2026, verify fee schedule).
City-set permit fees, insurance or bond premiums, and exam retake costs are additional. Check the official municipal fee schedule for any changes after June 2026.
Renewal and Continuing Education for HVAC License Requirements in Illinois
HVAC license requirements in Illinois generally require you to renew your municipal license on an annual or biennial basis. State law does not mandate a standard renewal period, so each city or village sets its own renewal window and process. For example, Joliet requires annual renewal with a $100 fee, while Chicago varies renewal terms by license category. Renewal deadlines are usually enforced strictly, and missing them can result in a lapsed license and late fees.
Renewal Process
To renew, you must submit any updated forms, provide proof of current insurance and bond, and pay the renewal fee to your municipal authority. Municipalities may require you to appear in person or allow online renewal. Maintaining your EPA Section 608 is also a continual requirement. The EPA 608 credential does not expire if you pass the universal exam.
Continuing Education (CE)
Formal CE is generally not required by Illinois municipalities for HVAC license renewal, according to the research brief. However, you should verify exact requirements with your city because some locations may pilot CE hours in future years. For now, most renewal requirements focus on updated insurance and payment of all fees. Failing to renew may mean reapplying for a license or retaking required exams to regain your working status under HVAC license requirements in Illinois.
Reciprocity
There is no statewide reciprocity for HVAC contractor licenses in Illinois. You cannot use a Joliet HVAC license to work in Chicago, or vice versa, unless the new city specifically recognizes your previous credential. However, some inter-municipal recognition exists between select cities. For example, Joliet currently accepts HVAC licenses from Aurora, Elgin, Rockford, Freeport, Springfield, Zion, and Peoria (as of June 2026, verify accepted cities).
This cross-city recognition is not automatic or guaranteed. Before bidding a job, always verify with the local building department whether your license will be accepted, or if you must apply and test for a separate local credential. There are no formal state reciprocity arrangements for any municipality in Illinois as of June 2026.
Official Links
Illinois Municipal Code (official municipal licensing statute)
IDFPR Professional Licensing (no HVAC but adjacent trade info)
Chicago Contractor Licensing Code
