Can You Sue a Seller for Hiding Major Home Defects in Illinois?

 Posted on November 10, 2026 in Real Estate

Illinois homebuyers can sue sellers who knowingly hide major defects or give false answers on required disclosure forms. However, proving the seller knew about the problem can be difficult. A disclosure claim also has a one-year filing deadline that does not always begin at closing. If you’ve bought a home and found a defect the seller didn’t disclose, our Cook County, IL residential real estate lawyers can review the evidence.

What Must Illinois Home Sellers Disclose Before a Sale?

Sellers covered by the Illinois Residential Real Property Disclosure Act must give buyers a completed report before the purchase contract is signed. Certain transactions, including some court-ordered transfers, are exempt.

The disclosure form in 765 ILCS 77/35 asks about known problems involving the roof, foundation, basement flooding, plumbing, electrical systems, and other problems. Sellers must answer based on what they know. They don’t have to inspect the home for defects before filling out the form.

Under 765 ILCS 77/25, sellers are not liable for an unknown problem or for certain errors when they reasonably believed a defect had already been corrected. If sellers find a mistake or realize they left something out before closing, they must give the buyer a written update.

How Can You Prove an Illinois Seller Knew About a Hidden Defect?

A disclosure claim often depends on showing that the seller knew about a material defect and answered inaccurately. A material defect is a serious problem affecting value or safety.

Useful evidence includes:

• Invoices, repair estimates, and contractor work orders from before the sale

• Insurance claims concerning flooding, roof damage, or structural problems

• Photographs of repairs, stains, or areas that appear to have been covered up

• Messages or statements the seller made to neighbors, agents, or contractors

• Earlier listings, disclosures, and property permit records

• Expert findings about how long the defect likely existed

For example, records of repeated basement repairs can support an argument that the seller knew about water problems. A preexisting defect alone does not prove knowledge.

Can You Sue an Illinois Home Seller for Fraud or Breach of Contract?

A buyer might have claims beyond a violation of the Disclosure Act. Fraud can involve knowingly false statements intended to influence the purchase. Fraudulent concealment can involve deliberately hiding a defect when the seller had a duty to disclose it.

A breach-of-contract claim can arise if the seller breaches a promise in the written purchase agreement. Agents and inspectors could face separate claims.

Under 765 ILCS 77/55, a knowing disclosure violation can result in actual damages and court costs. The judge can also award reasonable attorney fees to the prevailing party. Fraud claims can support additional remedies in appropriate cases.

How Long Do You Have to Sue for Undisclosed Defects in Illinois?

The deadline for a claim under the Disclosure Act is one year from the earliest of three dates: taking possession, occupying the home, or recording the deed. The clock can start on a different day than closing. It does not start when you discover the defect. 

Separate claims can have longer deadlines. Illinois commonly allows five years for fraud and 10 years for lawsuits based on written contracts, depending on the circumstances.

Because these deadlines differ, early legal review is important even if the damage appears months after the sale.

What Should You Do After Finding a Major Defect in an Illinois Home?

Photograph the damage before repairs while preventing further damage. Keep receipts and ask a qualified contractor to explain the condition, likely cause, and repair cost.

Save the disclosure report, inspection findings, purchase contract, and messages exchanged during the sale. Permits, earlier listings, and neighbors' observations can also help establish prior problems.

Does an As-Is Sale or Home Inspection Prevent an Illinois Lawsuit?

An as-is clause does not excuse a seller's knowing misrepresentation. Illinois courts also recognize that a buyer can rely on the seller's disclosure statements without conducting further investigation.

A buyer's knowledge of a defect can affect damages, even when it does not eliminate liability under the Act. For a separate fraud claim, you must show that you relied on what the seller told you and that it was reasonable to do so. What your inspection found can matter. 

Available compensation depends on the actual loss, not simply the price of repairs requested. A defect arising only after the sale does not prove the seller violated disclosure duties.

Contact Our Arlington Heights, IL Residential Real Estate Attorneys

Our firm brings over 150 years of combined legal experience to Illinois real estate matters. Our lawyers review disclosures, past repairs, and other records to determine whether the evidence supports a claim.

If you discover major home defects in 2026, acting promptly can help preserve evidence and protect filing deadlines. Contact Dickler, Kahn, Slowikowski & Zavell, Ltd. at 847-593-5595 to talk to our Cook County, IL residential real estate lawyers today.