Illinois Contractor License

Illinois has no statewide general contractor license, which makes bidding here a jurisdiction-by-jurisdiction exercise. There is no central board for general contracting; instead, individual municipalities set their own requirements, and the rules vary widely. Before bidding any project, confirm the specific city or county requirements for the job site, because a credential that satisfies one municipality may be worthless in the next. Chicago in particular runs one of the most stringent local licensing systems in the state, so treat work within city limits as requiring dedicated licensing research and lead time.

While general contracting is unlicensed at the state level, key specialty trades are not. Plumbing is licensed statewide through the Illinois Department of Public Health, and roofing contractors must hold state-level registration. Electrical work is generally handled at the local level. If your bid scope includes these trades, you must either hold the proper state credential or carry a properly licensed subcontractor, and you should price that compliance into the estimate. Because there is no NASCLA acceptance and no state reciprocity for general contractors, out-of-state bidders cannot rely on a single transferable credential and must satisfy each local jurisdiction independently.

Penalties reflect this fragmented structure. Unlicensed plumbing work draws fines of $1,000 to $5,000, and roofing violations can reach up to $5,000 per offense, while general contracting penalties depend entirely on local ordinances. The practical lesson for bidders is to never assume a project is unregulated: verify both the municipal general contractor requirements and the state-level trade licenses for plumbing and roofing before submitting a bid, since a missed local license can void your right to perform and collect.