How to Sue a Contractor in Illinois Small Claims Court

When Small Claims Court Is the Right Move

If a contractor took your deposit and disappeared, left a project half-finished, or did work so poor it needs to be redone, you can sue for up to $10,000 in Illinois small claims court. You do not need a lawyer, and the process is designed for exactly this kind of dispute.

Small claims court awards money only — the judge cannot order the contractor to come back and finish the job. So your claim needs to be framed as a dollar amount: the deposit you paid for work never performed, the cost to hire someone else to finish or fix the work, or the difference between what you paid and what you received.

Calculate Your Damages Before You File

Get specific about the number. If the contractor walked off with a $4,500 deposit, that figure is straightforward. If the work was partially completed but substandard, get written repair estimates from two other contractors — the judge will want to see what it actually costs to fix the problem, not what you feel the damage is worth.

Keep your claim at or below $10,000. If your actual losses exceed that, you can voluntarily waive the excess and file in small claims, or you can file in the general civil division (which usually means hiring a lawyer).

Send a Demand Letter First

A written demand letter is not legally required for every claim type, but it strengthens your case significantly. Send it by certified mail with return receipt requested, and keep a copy. Include:

• A clear description of the work agreement and what the contractor failed to do
• The specific dollar amount you are demanding
• A firm payment deadline (14 to 30 days)
• A statement that you will file in small claims court if the demand is not met

Many contractors settle at this stage to avoid a court record. If they ignore it, the unanswered demand becomes evidence of their refusal to resolve the dispute.

Name the Right Defendant

Search the Illinois Secretary of State Business Services database for the contractor's legal entity name. If your agreement was with an LLC or corporation, identify the exact legal entity that contracted with you and its registered agent for service. If you also seek to name an individual, confirm the basis for that claim.

If the contractor is a sole proprietor with no registered business, name them personally: "John Doe d/b/a Acme Home Services."

Naming the wrong party is one of the most common mistakes in contractor cases. An LLC that is named incorrectly or a sole proprietor sued under a trade name alone can lead to a judgment you cannot enforce.

File and Serve

File your Small Claims Complaint through eFileIL in the county where the work was done or where the contractor resides. Attach a copy of the contract, your cancelled check or payment confirmation, and the demand letter with its delivery receipt.

For an LLC or corporation, serve the registered agent through sheriff service. For an individual, clerk certified mail under Rule 284 is the simplest option.

Prepare for the Hearing

Organize your evidence chronologically: the contract, proof of payment, photos of incomplete or defective work, repair estimates, communications, and the demand letter. Three copies of everything.

The judge will ask what you agreed to, what you paid, what the contractor did or did not do, and what it costs to make it right. Stick to facts and dollar amounts — courtroom complaints about the contractor's character do not move the case forward.

Need help organizing the full filing process? The Illinois Small Claims Filing Guide includes a step-by-step checklist, deadline tracker, and evidence organizer built for contractor disputes.

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