STATE LICENSE
NoneSee what applies
No Illinois statute licenses heating, ventilation, or air-conditioning contractors. The federal layer is the constant: technicians who service or dispose of refrigerant-containing equipment must hold EPA Section 608 certification (Type II for high-pressure systems such as residential and light-commercial AC).
Residential HVAC replacements are home repair under Illinois law — the Home Repair and Remodeling Act names central air conditioning, central heating, boilers, and furnaces — so the $1,000 written-contract, consumer-brochure, and insurance rules apply. In Chicago, an HVAC subcontractor works under the permit's licensed general contractor rather than holding a separate trade license.
The state sets the license floor; the county or city permit office controls filing, inspections, and local rules wherever the job site sits.
With no state license, local building departments set the rules through mechanical permits and any local licensing they adopt. In Chicago, permitted HVAC work runs under the project's licensed general contractor, and an HVAC subcontractor appears on the permit only if it schedules inspections.
The local offices section below names the exact permit desk for every Illinois county on file.
Each row names the issuing authority, cost, timeline, citation, and status behind the requirement — verified against the official source.
Published fees from the issuing authorities, as of October 2026. Local permit fees vary by project and jurisdiction — the basis is stated where a flat number does not exist.
The Home Repair and Remodeling Act lists central air conditioning, central heating, boilers, and furnaces — residential HVAC jobs carry its contract and insurance rules.
Chicago's GC rules say an HVAC subcontractor is listed on the permit only if it schedules the inspections; the licensed GC carries the license.
Offering to pay a homeowner's insurance deductible is banned for home repair contractors.
A practical sequence for a new HVAC contractor in Illinois. Actual agency processing times are noted in the ledger above.
Each item names the issuing authority, cycle, and citation.
Statutory consequences with their citations — not estimates, not “commonly cited” guesses.
Any violation is a Consumer Fraud and Deceptive Business Practices Act violation, enforceable by the Attorney General or State's Attorney; customers may sue for actual damages.
Knowingly failing to provide coverage is a Class 4 felony for owners and officers; civil penalties of up to $500/day with a $10,000 minimum.
Inside city limits, the city office listed here issues the permit; the county office serves unincorporated areas. Every office links to its official page.
Every fact in this file was checked against these official sources on October 2026.
Pending verification: Which Illinois municipalities outside Chicago license HVAC/mechanical contractors — confirm with each local building department
General information, not legal advice. Always confirm requirements, deadlines, and forms with the issuing authority before filing or contracting.
Store licenses, permits, policies, and renewal dates in one place.