Illinois has no statewide general contractor license. To get licensed as a general contractor in Illinois, you form your business with the state, line up the required insurance and any bond, then apply for a contractor license or registration in each city or county where you plan to take on work. Requirements shift from one municipality to the next, but the sequence is the same everywhere.
Why Licensing Happens City by City
Illinois gives local governments broad authority over construction regulation, and many are “home rule” units that write their own licensing and building code rules. The result is a patchwork. The Village of Northbrook charges $100 to register as a general contractor.1Village of Northbrook. Information for Contractors Des Plaines requires registration and a bond before you can work in the city.2City of Des Plaines. Contractor License and Bond Requirements Chicago runs a five-tier system with exams, insurance minimums, and annual renewals.3City of Chicago. General Contractor License
One boundary to note. A few specialty trades are licensed at the state level rather than locally. The Illinois Department of Public Health licenses plumbers and plumbing contractors,4Illinois Department of Public Health. Plumbing and the Illinois Department of Financial and Professional Regulation licenses roofing contractors.5Illinois Department of Financial and Professional Regulation. Roofing Contractor If your work is general contracting rather than a regulated specialty, every requirement you face will come from a local office.
Set Up the Business First
No municipality will license a business that doesn’t exist on paper. If you plan to operate as an LLC or corporation, file formation documents with the Illinois Secretary of State’s Business Services Division.6Illinois Secretary of State. Business Services Sole proprietors skip that filing, but they still need a federal Employer Identification Number from the IRS if they hire anyone.
You also register with the Illinois Department of Revenue before purchasing materials, collecting sales tax, or hiring employees. Registration generates the state taxpayer identification number you’ll use for Illinois income tax withholding and other obligations.7Illinois Department of Revenue. Business Registration The fastest route is MyTax Illinois, the department’s online portal.8Illinois.gov. Business Tax Registration Online
Insurance You’ll Need
Every municipality that licenses general contractors requires insurance, though minimums vary. Smaller suburbs commonly ask for $1,000,000 per occurrence in commercial general liability. Chicago’s top tier, Class A, requires $5,000,000 per occurrence.3City of Chicago. General Contractor License Your policy needs to cover bodily injury, property damage, personal injury, and completed operations. Annual premiums for a $1,000,000 policy generally run between roughly $1,000 and $5,000, based on revenue, payroll, and claims history.
Workers’ compensation is separate and not optional. Illinois law requires every employer to carry it, even if you have a single part-time employee.9Illinois Department of Insurance. Workers’ Compensation Insurance Compliance Exceptions are narrow. The coverage pays medical bills and lost wages when someone gets hurt on the job.10Illinois Workers’ Compensation Commission. Insurance Going without it exposes you personally to injury claims and will disqualify you from holding a license.
Surety Bonds
A surety bond is a financial guarantee for your clients. If you walk off a job or violate codes, the bond gives the injured party money to draw from. Many municipalities require general contractors to post a bond as a licensing condition, with amounts typically between $5,000 and $50,000 depending on the jurisdiction and the scope of work.
You don’t pay the face amount. You pay an annual premium, usually 1% to 10% of the bond value, based largely on your personal credit score. A contractor with strong credit might pay $250 a year for a $25,000 bond; someone with poor credit could pay $2,500 for the same coverage.
Applying in Your Municipality
Once the business is formed, insured, and bonded, you apply through the building or planning department of the city or village where you want to work. A typical application package includes:
- The completed application form, available online or at the local department office.
- Certificates of liability and workers’ compensation insurance, sometimes naming the municipality as an additional insured or certificate holder.
- A copy of the surety bond, if one is required.
- Business registration documents: LLC articles of organization, corporate filing, or assumed business name certificate.
- Your state and federal tax ID numbers.
Fees swing widely. Northbrook charges $100.1Village of Northbrook. Information for Contractors Chicago runs from $300 to $3,500 depending on license class.3City of Chicago. General Contractor License Some municipalities also require a local competency exam; the licensing department sends exam details after you apply. Missing documents are the most common cause of processing delays.
Chicago’s Five License Classes
Because Chicago is the largest construction market in the state and has the most structured system, its rules are worth knowing in detail. Chicago requires a general contractor license for most construction, alteration, repair, and demolition work inside city limits.3City of Chicago. General Contractor License The city sorts licenses into five classes tied to the maximum project value you’re allowed to take on:
- Class A: unlimited project value, ordinary and complex demolition allowed, $5,000,000 minimum insurance per occurrence, $3,500 annual fee.
- Class B: projects up to $20,000,000, ordinary and complex demolition, $3,000,000 minimum insurance, $1,800 annual fee.
- Class C: projects up to $10,000,000, ordinary demolition only, $2,000,000 minimum insurance, $1,300 annual fee.
- Class D: projects up to $4,000,000, ordinary demolition only, $2,000,000 minimum insurance, $900 annual fee.
- Class E: projects up to $500,000, no demolition, $1,000,000 minimum insurance, $300 annual fee.
Insurance minimums for Class C and D increased effective January 1, 2026. Holders of those licenses before that date see the new minimums take effect when their existing policy expires. Policies must come from an insurer authorized in Illinois with at least a B+ rating from A.M. Best, and you can stack a primary policy with an umbrella to reach minimums above $1,000,000. A Chicago general contractor license also covers residential home repair work, so no separate home repair license is needed for that work.3City of Chicago. General Contractor License
Federal Lead-Safe Certification
This one catches contractors off guard because it comes from the EPA, not from any Illinois office. Under the federal Renovation, Repair, and Painting (RRP) rule, any work that disturbs painted surfaces in a home, child care facility, or preschool built before 1978 must be performed by a lead-safe certified firm.11U.S. Environmental Protection Agency. Lead Renovation, Repair and Painting Program Illinois doesn’t run its own renovation-firm program, so you apply directly to the EPA.
Firm certification costs $300 and renews at the same price.12U.S. Environmental Protection Agency. EPA Certification Program – Fees for Renovation Firms and Abatement Firms At least one worker on every covered job site must complete an EPA-accredited renovator training course. The rule does not reach homeowners working on their own homes, but it does reach house flippers and landlords renovating rentals.11U.S. Environmental Protection Agency. Lead Renovation, Repair and Painting Program Much of the state’s housing stock predates 1978, so this comes up often.
Keeping the License Active
Most municipalities renew annually or biennially. Chicago renews every year at the same fee as the original license, so a Class A holder pays $3,500 again each year.3City of Chicago. General Contractor License A lapsed Chicago license costs an extra $100 to reinstate for each year or partial year it was expired.
Renewal usually means submitting updated insurance and workers’ compensation certificates. If your bond has expired, or your address, ownership, or trade name has changed, update the licensing authority. Letting insurance or bonds lapse is the fastest route to a suspended or inactivated license, often without much warning. Beyond paperwork, licensed contractors are expected to keep current with local codes and pull the right permits on every job. Cities audit active licensees, and homeowner complaints trigger investigations.
Working Without a License
The consequences reach further than the fines, and the fines are already steep. In Chicago, working without the required license class carries penalties of $500 to $10,000 per offense, with each day the violation continues counting as a separate offense.13American Legal Publishing. Chicago Municipal Code 4-36-190 Violation – Penalty A two-week job without a license can generate ten separate violations. Other municipalities set their own fines, and some refer cases to the state’s attorney for criminal prosecution.
The bigger financial risk sits in your ability to get paid. In Illinois, an unlicensed contractor’s mechanic’s lien is generally unenforceable, so if a homeowner refuses to pay for completed work, you may have no way to place a claim against the property. Some courts have refused to enforce the underlying contract itself when the contractor lacked a required license. The license is what protects your right to collect.