Heating and air conditioning license in Illinois
Who licenses it
No statewide license in Illinois for this work. Your city or county licenses it.
Checked November 8, 2026. Rules and thresholds change; confirm with the board before you start work.
Homeowners: checking a pro
There's no statewide license for this in Illinois, so ask which city or county license they hold, and ask for proof of insurance.
Pros: listing on ExpertMarketplace
Add your local license if you hold one; it shows on your page. Add your insurance too: listings show "Insured" or "No insurance on file" to every visitor.
Create my free pageHeating and air conditioning in Illinois's biggest cities
ChicagoAuroraRockfordJolietNapervilleSpringfieldPeoriaNorth PeoriaElginWaukeganWest TownChampaignNear North SideCiceroBelmont CraginBloomingtonArlington HeightsEvanstonSchaumburgBolingbrookSouth LawndaleLogan SquareDecaturWest RidgePalatineLincoln ParkPortage ParkSkokieDes PlainesOrland Park