Illinois Seller Disclosure Requirements: The Residential Real Property Disclosure Report, the Before-Contract Rule, and the Buyer's 5-Business-Day Exit

Illinois seller disclosure requirements sit in a single act. The Residential Real Property Disclosure Act, 765 ILCS 77, tells you to complete a 24-statement report and hand it to the prospective buyer before any contract is signed. It also tells you to supplement that report if you learn something new before closing.

Timing is the part most sellers get wrong. Illinois gives no grace period after the contract. Deliver the report late and the buyer may walk inside 5 business days with every dollar of earnest money. This guide walks the act section by section, then covers radon, lead paint, and as-is cash sales.

What Are Illinois Seller Disclosure Requirements?

Illinois requires a seller of residential real property to complete every item on a statutory disclosure report and deliver it to the prospective buyer before the contract is signed (765 ILCS 77/20). That is the core duty, and the rest of the act builds around it.

The definitions in 765 ILCS 77/5 set the boundaries. "Residential real property" means property improved with not less than one nor more than four residential dwelling units, plus condominium units and units in residential cooperatives. A Chicago two-flat, an Aurora ranch, and a Rockford bungalow are all inside the act.

Which transactions the act reaches

Section 765 ILCS 77/10 reaches more than a plain sale. It applies to a sale, an exchange, an installment land sale contract, an assignment of beneficial interest, a lease with an option to purchase, and a ground lease. "Seller" reaches an owner, a land trust beneficiary, and a contract purchaser.

When Is the Illinois Residential Real Property Disclosure Report Due?

Before the signing of a contract. Section 77/20 states it in one line: "The seller shall deliver to the prospective buyer the written disclosure report required by this Act before the signing of a contract." Section 77/5 defines "contract" as a written agreement that would, subject to negotiated contingencies, require the buyer to accept a transfer.

What counts as delivery

Section 765 ILCS 77/50 allows three routes: personal delivery, facsimile, email, or other electronic delivery; first class mail with postage prepaid; or a service such as Federal Express or UPS. Delivery to one prospective buyer counts as delivery to all of them.

Delivery is effective on receipt, and receipt may be acknowledged on the report or in any other verifiable manner. Get that acknowledgment signed. A dated signature is the cleanest proof the report arrived first.

The buyer's 5-business-day exit when the report is late

Section 765 ILCS 77/40(a) is the enforcement mechanism. If the report discloses a material defect, including any statement answered "yes" except numbers 1 and 2, and it reaches the buyer after all parties have signed, the buyer holds a right to terminate.

The window is 5 business days after receipt. The buyer gets back all earnest money deposits and down payments "without any liability to or recourse by the seller." Termination is deemed made when written notice reaches at least one seller by a Section 50 method, and the right ends at conveyance under Section 77/40(c).

The 24 Statements on the § 77/35 Report

Section 765 ILCS 77/35 prints the form, and the seller answers each of 24 numbered statements "yes," "no," or "not applicable." Any yes or not applicable, other than number 1, requires a written explanation.

Statements 1 and 2 are status questions, which is why Section 40(a) excludes them from the termination trigger. Number 1 asks whether the seller occupied the property within the last 12 months. Number 2 asks about current flood hazard insurance. Statements 3 through 24 begin with "I am aware of," and cover the conditions that decide most Illinois deals:

• Water and ground: flooding or recurring leakage in the crawl space or basement, floodplain location, and mine subsidence, settlement, sliding, or upheaval.
• Structure: defects in the basement or foundation including cracks and bulges, in the roof, ceilings, or chimney, and in the walls, windows, doors, or floors.
• Systems: electrical, plumbing including the water heater and sump pump, heating, air conditioning, or ventilating, and the fireplace or wood burning stove.
• Water supply and waste: the well or well equipment, unsafe drinking water, and the septic, sanitary sewer, or other disposal system.
• Health hazards: unsafe concentrations of radon, asbestos, lead paint, lead water or plumbing pipes, or lead in the soil.
• Insects: current termite or wood boring insect infestations, and structural defects caused by previous ones.
• Legal and site: underground fuel storage tanks, boundary disputes, uncorrected code violations, and methamphetamine manufacture.

Two footnotes on the form are easy to miss. The disclosures skip a condominium's common elements, and they reflect current condition rather than past problems the seller reasonably believes have been corrected.

The "Aware" Standard, and What the Report Is Not

The form defines "aware" as having actual notice or actual knowledge without any specific investigation or inquiry. That definition does most of the work in Illinois disclosure disputes. It sets the bar at what you actually know, not at what a careful owner could have found out.

"Material defect" has its own definition. It is a condition that would have a substantial adverse effect on value, or would significantly impair the health or safety of future occupants. A condition the seller reasonably believes has been corrected is outside it. The report is not a warranty either. The disclosures "shall not be deemed warranties of any kind by the seller or any person representing any party in this transaction."

Section 765 ILCS 77/25 says the same thing. The seller discloses material defects of which the seller has actual knowledge, and nothing in the act requires any specific investigation. Subsection (a) also shelters a seller from liability for three kinds of error. One is an error the seller did not know about. One is an error the seller reasonably believed had been corrected. One rests on information from a public agency or a licensed professional.

Who Is Exempt Under 765 ILCS 77/15?

Nine categories of transfer sit outside the act under 765 ILCS 77/15, and a seller in any of them is exempt whether or not a report is delivered.

Three of those matter most in practice. An executor or trustee selling under item (3) is exempt, which is worth knowing if you are selling an inherited house in Illinois. A spouse taking title under a dissolution judgment falls under item (1), common when selling a house during divorce in Illinois. A deed in lieu under item (2) comes up for owners working to stop foreclosure in Illinois.

An exemption excuses the report, not honesty. Section 765 ILCS 77/45 says the act "is not intended to limit remedies or modify any obligation to disclose created by any other statute or that may exist in common law in order to avoid fraud, misrepresentation, or deceit." An exempt fiduciary who knows about a failing foundation should still ask counsel what common law expects.

Radon and Lead Paint: Two Separate Duties

Radon and lead paint carry rules that sit on top of the Section 35 report, so statements 15 and 17 are not the whole obligation.

The Illinois Radon Awareness Act

Under 420 ILCS 46/10(a), the seller gives the buyer two documents before the buyer is obligated under any contract. One is the IEMA pamphlet "Radon Testing Guidelines for Real Estate Transactions." The other is the Illinois Disclosure of Information on Radon Hazards, printed in Section 10(b).

That form asks the seller to initial statements about elevated radon concentrations, records, and prior mitigation. Section 10(a) is explicit that nothing in it implies an obligation to test or mitigate, though IEMA strongly recommends every buyer test before purchase or occupancy. Section 10(c) adds that disclosures made after an offer must be completed before the seller accepts it.

Federal lead paint disclosure for pre-1978 houses

Houses built before 1978 carry a federal duty that no Illinois exemption removes. It comes from 42 U.S.C. § 4852d, and EPA and HUD enforce it (EPA, Lead-Based Paint Real Estate Disclosure). A seller of most pre-1978 housing must:

• Give the buyer the EPA pamphlet "Protect Your Family From Lead In Your Home."
• Disclose known lead-based paint and lead paint hazards, and hand over any records or reports.
• Allow a 10-day period for a lead inspection, which the parties may change in writing and the buyer may waive.
• Include the Lead Warning Statement and signed acknowledgments in the contract, and keep a copy for three years.

Illinois housing skews old, which makes this routine rather than rare. More than 80,000 Chicago bungalows are still standing, nearly one third of the city's single-family housing stock, all built by the mid-1930s (Chicago Bungalow Association, September 2026).

What Happens If an Answer Is Wrong or Something Changes

Section 765 ILCS 77/30 requires a written supplemental disclosure. If the seller discovers an error, inaccuracy, or omission in a prior report before closing, the supplement goes to the buyer by a Section 50 method. A supplement does not automatically hand the buyer a way out. Under Section 77/40(b), the buyer may terminate on a supplement only if:

• The defect results from an error the seller had actual knowledge of when the prior report was signed.
• The defect is not repairable before closing.
• The defect is repairable, but within 5 business days of the supplement the seller declines or fails to agree in writing to repair it.

Damages and the one-year clock

Section 765 ILCS 77/55 sets the consequences. A seller who fails or refuses to provide the report before conveyance gives the buyer a right to terminate. A seller who knowingly violates a duty, or discloses information the seller knows to be false, is liable for actual damages and court costs, and the court may award attorney's fees to the prevailing party.

Section 765 ILCS 77/60 caps the window. No action under the act may be commenced later than one year from the earliest of the date of possession, the date of occupancy, or the date the conveyance is recorded.

Does Selling a House As Is in Illinois Remove the Duty?

No. Selling a house as is in Illinois settles who pays for repairs, and it does nothing to the disclosure report. An as-is clause appears nowhere in the nine exempt transfers at Section 77/15, so it cannot remove the report or turn a defect you know about into one you do not.

The form anticipates as-is sales directly. Its notice says the report "DOES NOT LIMIT THE PARTIES' RIGHT TO CONTRACT FOR THE SALE OF RESIDENTIAL REAL PROPERTY IN 'AS IS' CONDITION." Lower down, the buyer acknowledges that the parties may negotiate a sale subject to any or all disclosed material defects.

That is the honest version of an as-is sale. You write down what you know, the buyer prices it, and the contract allocates repairs. What an as-is clause will not cover is an answer you knew was false, because Section 77/55 attaches damages to exactly that. Our guide for houses needing major repairs covers the tradeoff.

How a Direct Cash Offer Fits the Disclosure Rules

The report still gets completed and delivered before the contract, because nothing in 765 ILCS 77 turns on how the buyer pays. A cash buyer signs the same contract defined in Section 77/5 and holds the same Section 77/40 rights if the report shows up late.

Propcash is a direct cash homebuyer, founded in 2026 and based in Nashville, and it makes offers as a principal. Offers are made as-is, so Propcash does not ask a seller to repair what the report reveals. A failing roof on a Rockford ranch or a cracked foundation under an Aurora split-level can be disclosed and still transact.

• The report comes first. You complete all 24 statements and deliver it before anything is signed.
• Your records travel with your answers. Radon results, sewer scopes, and roof invoices attach to the statements they support.
• No repair list follows a "yes." A disclosed condition typically shapes the offer, not a punch list.
• You pick the closing date. Cash transactions can close in as few as 7 days, or later if a payoff needs room.

Zillow's home value index for Illinois reads $299,900, up 5.1% year over year. Chicago sits at $337,993, up 4.5%, Aurora at $326,890, up 2.9%, and Rockford at $186,815, up 9.8% (Zillow Home Value Index, July 2026). You can get a cash offer on your Illinois house and read it against a listed sale, or start with selling a house for cash in Illinois.

If a cash sale is not your best move, Propcash will say so and point you to a local agent who fits. We may receive compensation from agents we refer.

Frequently Asked Questions

When does an Illinois seller have to deliver the disclosure report?

Before the signing of a contract, under 765 ILCS 77/20. The seller completes every item on the Section 35 form and delivers it to the prospective buyer first. Section 50 allows personal delivery, email, first class mail, or a service such as Federal Express or UPS.

What happens if the Illinois disclosure report arrives after the contract is signed?

The buyer may gain a 5-business-day exit. Under 765 ILCS 77/40(a), if the report discloses a material defect and reaches the buyer after all parties have signed, the buyer may terminate within 5 business days after receipt. Earnest money comes back without any liability to or recourse by the seller, and the right ends at conveyance.

Do I still have to complete the report if I sell my house as is in Illinois?

Yes, unless the transfer is exempt under 765 ILCS 77/15. An as-is clause allocates who pays for repairs, and it appears nowhere in the exemption list. The Section 35 form says the parties may negotiate a sale subject to any or all disclosed material defects, which is how an honest as-is sale works.

Who is exempt from Illinois seller disclosure requirements?

Section 765 ILCS 77/15 lists nine exempt transfers. They include court-ordered transfers such as probate administration and divorce judgments, deed-in-lieu and foreclosure transfers, and transfers by a fiduciary administering an estate, guardianship, or trust. The list also covers co-owner and family transfers, transfers from a decedent by will, intestacy, or a transfer on death instrument, relocation companies, government transfers, and never-occupied new construction.

Does Illinois require a separate radon disclosure?

Yes. The Illinois Radon Awareness Act, 420 ILCS 46, requires the seller to give the buyer two things before the buyer is obligated under any contract. They are the IEMA radon pamphlet and the Illinois Disclosure of Information on Radon Hazards. Nothing in Section 10 obligates a seller to test or mitigate, and statement 15 on the disclosure report is a separate item.

What happens if an answer on the Illinois disclosure report turns out to be wrong?

Section 765 ILCS 77/30 requires a written supplemental disclosure if the seller learns before closing that a prior report contains an error or omission. Section 25 shelters a seller from liability for an error the seller did not actually know about. Knowingly disclosing false information brings actual damages and court costs under Section 55.

Does a cash buyer still need the Illinois disclosure report?

Yes. Nothing in 765 ILCS 77 turns on how the buyer pays, so a direct cash buyer receives the same completed report before the contract is signed. A cash buyer purchasing as-is typically prices a disclosed condition into the offer rather than returning with a repair list.

Data Sources: 765 ILCS 77 and 420 ILCS 46, read on the Illinois General Assembly statute site; US EPA; Chicago Bungalow Association; Zillow Home Value Index. Propcash is not a law firm. Illinois sellers should consult an Illinois-licensed attorney about a specific transaction.