Illinois Real Estate Disclosure Law: the Disclosure Form and FSBO Disclosures

Nearly every Illinois home seller (agent-listed or FSBO) must complete the Residential Real Property Disclosure Report and deliver it to the buyer before the contract is signed. The law is the Illinois Residential Real Property Disclosure Act, 765 ILCS 77. The standard is actual knowledge: you must truthfully disclose material defects you actually know about, but you are not required to hire inspectors or investigate your own house. A seller who knowingly lies on the form is liable for the buyer's actual damages and court costs, the court may add attorney fees, and the buyer generally has one year to sue.

That's the whole framework in one paragraph. The trouble is in the application: who's exempt, what "actual knowledge" really means, what changed on the form recently, and what happens when the basement that "never floods" floods in April. I've closed more than 700 transactions and $54 million in volume since 2014, and disclosure disputes are the single most common post-closing fight I see. Here's how to stay out of one.

What the Act Requires

The Act applies to most transfers of residential real property with one to four dwelling units, including condominium units. The seller completes the statutory disclosure report form and delivers it to the prospective buyer before the signing of a contract. If the report shows up late (after the buyer has already signed) and it discloses a material defect, the buyer gets a short window to terminate: three business days after receipt (765 ILCS 77/40).

Practical translation: get the form done before you list, not the night before attorney review ends. A late disclosure hands the buyer a free exit ramp at the exact moment you least want them to have one.

What the Disclosure Form Covers

The report is a numbered list of yes/no statements about material defects. The current form runs roughly two dozen items, and the 2022 revisions added flood-related questions (flood insurance on the property, floodplain location, and flood damage history) alongside the existing radon item. Make sure you're using the current version of the form; an outdated one is an easy way to buy yourself a problem.

The substance covers:

• Flooding, recurring leakage, and water intrusion in the basement or crawl space
• Material defects in the foundation, walls, and roof
• Material defects in the plumbing, electrical, heating, and air conditioning systems
• Well and septic system defects, and unsafe drinking water
• Termites and other wood-boring insect infestation or damage
• Unsafe concentrations of radon, asbestos, or lead-based paint
• Underground fuel storage tanks
• Boundary or lot-line disputes
• Material violations of building codes or zoning

A "material defect" under the Act is a condition that would have a substantial adverse effect on the value of the property or that would significantly impair the health or safety of future occupants. The leaky hose bib doesn't qualify. The foundation crack you had quoted at $18,000 and then painted over absolutely does.

Separately, the Illinois Radon Awareness Act (420 ILCS 46) requires sellers to give buyers the IEMA radon pamphlet and a radon hazard disclosure. It does not require you to test or to mitigate; it requires you to be honest about what you know.

"Actual Knowledge": It's a Disclosure, Not a Warranty

This is the part both sides get wrong, in opposite directions.

Sellers panic, thinking they're guaranteeing the condition of the house. You're not. The report itself says it is not a substitute for inspections and not a warranty. You have no duty to hire an inspector, crawl under the porch, or open up walls before answering. If you genuinely don't know whether the crawl space takes water, the form lets you say so.

Buyers relax, thinking the form protects them like a warranty would. It doesn't. If the seller honestly didn't know about the defect, the Act gives the buyer nothing, which is exactly why you still get a professional inspection during the inspection and attorney review periods instead of relying on a seller's paperwork.

The line I give sellers: answer what you know, don't speculate, and don't get clever. "Actual knowledge" is not a loophole for refusing to remember the water in the basement in 2023. Juries are made of people who have owned basements.

Who's Exempt

The Act exempts certain transfers, including, in broad strokes:

• Transfers pursuant to court order: probate sales, bankruptcy, divorce decrees
• Transfers from a borrower to a lender: deeds in lieu of foreclosure, consent judgments, and foreclosure-related conveyances
• Transfers by a fiduciary administering a decedent's estate, guardianship, conservatorship, or trust
• Transfers between co-owners, or to a spouse or lineal relatives
• Transfers to or from governmental entities
• Transfers of newly constructed homes never occupied

The estate exemption is the one I use most. An executor selling Mom's house, having never lived in it, typically does not complete the report. But two warnings. First, exemption from the form is not a license to lie: if an exempt seller actually knows about a defect and conceals or misrepresents it, common-law fraud is still on the menu. Second, buyers price uncertainty: an estate sale with no disclosure and no inspection access will trade like the as-is sale it effectively is.

FSBO Sellers Still Must Disclose

There is no for-sale-by-owner exemption. None. The Act attaches to the transfer, not to whether a broker is involved. If anything, FSBO sellers face more disclosure risk, because there's no agent handing them the current form, no broker reminding them about the radon pamphlet, and no one checking that the report went out before the contract was signed.

This is most of what I do for FSBO sellers: correct forms, correct sequence, correct answers reviewed before anything gets signed. And since the title company pays my seller-side fee, the cost to you is zero. Running the numbers on selling without an agent? The net proceeds calculator on my home-selling page shows what you actually keep.

Federal Lead-Based Paint Disclosure (Pre-1978 Homes)

If the home was built before 1978, federal law (42 U.S.C. § 4852d) stacks a second disclosure on top of the Illinois one: a lead-based paint disclosure form, the EPA's "Protect Your Family From Lead in Your Home" pamphlet, and a 10-day opportunity for the buyer to conduct a lead inspection, which buyers may waive and usually do. This one has real teeth: civil penalties per violation run into five figures, and a knowing violation can expose the seller to treble damages in a private suit. Given the age of Chicagoland housing stock, this form applies to a huge share of my closings.

What Buyers Can Do When a Seller Lied

Under the Act, a seller who knowingly violates it (or who discloses information on the report knowing it's false) is liable for actual damages and court costs, and the court may award reasonable attorney fees. The catch is speed: suit under the Act must generally be brought within one year (765 ILCS 77/60). Buyers who discover the recurring seepage in their second spring are often already outside the Act.

They are not necessarily out of options. Common-law fraud and fraudulent concealment claims run on a longer limitations clock, and the Illinois Appellate Court held in Bauer v. Giannis that an as-is clause does not bar fraud claims connected to the disclosure obligations. Fraud is harder to prove (you need misrepresentation or concealment, not just a wrong answer), but fresh paint over a documented crack, a contractor's old estimate in the seller's email, or the neighbor who remembers the pump trucks can carry that weight.

What I tell buyers who call me with a wet basement and a clean disclosure form: move fast, preserve evidence, and get the repair professionally documented before you fix it. The one-year window does not pause while you get around to it.

How Disclosure Interacts With As-Is Sales

Selling as-is changes what you'll repair. It changes nothing about what you must disclose. As-is means "I won't fix it," not "I won't mention it"; as I put it in my as-is guide, as-is does not mean as-unknown. The disclosure report still gets completed, the radon and lead documents still go out, and a buyer who can prove you knew about the defect can still sue despite the as-is rider. An accurate disclosure is actually the as-is seller's best friend: a defect disclosed before contract is a defect the buyer accepted and priced. It's the undisclosed ones that come back as lawsuits.

For everything my office covers between contract and closing, see the full real estate services page.

Frequently Asked Questions

Do FSBO sellers have to provide the Illinois disclosure report?

Yes. The Residential Real Property Disclosure Act applies whether or not an agent is involved. FSBO sellers must deliver the current statutory form before the contract is signed, plus the radon disclosure and, for pre-1978 homes, the federal lead-based paint disclosure.

Is the disclosure report a warranty of the home's condition?

No. It discloses material defects the seller actually knows about, and the form itself says it's not a substitute for inspections. Buyers should always inspect during the contract's inspection period regardless of what the report says.

How long does a buyer have to sue over a false disclosure?

Claims under the Act must generally be brought within one year (765 ILCS 77/60). Common-law fraud claims may be available longer, but they require proof the seller actually knew and concealed or misrepresented the defect. Either way, the answer is: sooner than you think, so call an attorney promptly.

Does an estate have to complete the disclosure report?

Transfers by fiduciaries administering a decedent's estate or trust are generally exempt from the report requirement. The exemption is not a shield for actual fraud, and buyers of estate properties should lean harder on their own inspection because no disclosure is coming.

Whether you're a seller staring at a blank disclosure form or a buyer staring at a defect that was definitely not on the one you received, call me at (630) 839-9195 or book a free consultation. Seller-side representation is free (the title company pays my fee), and buyer-side closings are a $500 flat fee. Fifteen minutes now beats a year of litigation later.