Guide · Real Estate · Illinois

The Illinois Seller Disclosure Report: A Legal Obligation, Not a Formality

What a seller must reveal before you sign, and what both sides tend to misunderstand about selling “as is.”

By Lincoln Square Law · 8-minute read

Most Illinois home sales include a short, four-page form that buyers skim and sellers fill out quickly: the Residential Real Property Disclosure Report. Because it looks like paperwork, it is easy to treat it as a formality. It is not. The report is required by statute, it has to be delivered at a specific point in the transaction, it gives buyers a termination right in some circumstances, and it can be the basis for a lawsuit after closing. Both sides benefit from understanding what it covers and what it does not.

What the law requires

The Residential Real Property Disclosure Act requires a seller of residential real property to complete all applicable items in the statutory disclosure report and deliver it to the prospective buyer before the parties sign a written agreement that would require the buyer to accept a transfer of the property (765 ILCS 77/20). The report itself is set out in the statute, and it asks the seller to answer questions about specific conditions known to the seller, such as flooding or leakage in the basement, material defects in the roof, walls, foundation, heating, plumbing, or electrical systems, radon, mold, lead-based paint, underground fuel tanks, boundary issues, and prior repairs (765 ILCS 77/35).

The Act applies to residential real property with one to four dwelling units, including condominium units and units in residential cooperatives. It exempts a list of transfers, including many transfers by court order, foreclosure-related transfers, transfers between co-owners, transfers to or from governmental entities, and transfers of newly constructed property that has never been occupied (765 ILCS 77/15). Whether a particular sale is exempt should be confirmed early, because an exemption changes what the buyer can expect to receive.

The Act also defines who counts as a seller. It reaches a person or entity with an interest in the property who has occupied it or had management responsibility for it. A seller who has not lived in the property recently, such as a landlord who never lived there, explains that relationship on the form, and the answers are read in light of what that seller could actually know.

The purpose of the Act, as the Illinois Appellate Court has described it, is to give prospective buyers information about material defects known to the seller, so that a buyer can decide whether and on what terms to purchase (Coughlin v. Gustafson, 332 Ill. App. 3d 406 (2002)).

What the report is, and what it is not

The report is a disclosure of the seller’s actual knowledge. It is not a warranty that the house is free of defects, and it is not a substitute for a home inspection. A seller who honestly did not know about a problem is generally not liable under the Act for failing to disclose it, and the statute protects a seller who reasonably believed a condition had been corrected (765 ILCS 77/25). That is why the report and the inspection work together. The report tells the buyer what the seller knows. The inspection tells the buyer what a trained professional sees.

The report also reflects conditions at the time it is signed. If the seller learns before closing that an answer has become inaccurate, for example because the basement floods after the report was delivered, the seller must supplement the disclosure (765 ILCS 77/30).

Timing, and the buyer’s right to terminate

Timing matters because the statute attaches consequences to late delivery. If the report is delivered after all parties have signed the contract, and it discloses a material defect, the buyer may terminate the contract within five business days after receiving it and get back all earnest money and down payments, without liability to the seller (765 ILCS 77/40(a)). Older guides describe a three-day window. The period was extended to five business days by a 2022 amendment.

A defect disclosed later, in a supplement to a report that was delivered on time, is treated differently. The buyer can terminate only in narrower circumstances: when the defect results from an error or omission the seller actually knew about when the original report was signed, when the defect cannot be repaired before closing, or when it can be repaired but the seller declines or fails to agree in writing, within five business days, to repair it (765 ILCS 77/40(b)). Any termination right under section 40 ends once the property is conveyed (765 ILCS 77/40(c)).

If the seller never delivers the report at all before closing, the buyer has a right to terminate the contract (765 ILCS 77/55). In practice, a buyer’s attorney will ask for the report during attorney review if it has not already arrived.

“As is” does not erase the statute

Sellers sometimes believe that listing a house “as is” avoids disclosure obligations. It does not. An “as is” clause can limit a seller’s obligation to make repairs, and it may affect contractual remedies, but it does not relieve a seller who is covered by the Act from completing and delivering the report. A seller who knows about a material defect and answers the report inaccurately takes on risk regardless of how the listing describes the sale.

Other disclosures that often travel with the report

• Lead-based paint. For housing built before 1978, federal law requires sellers to disclose known lead-based paint and hazards, provide available records and an EPA pamphlet, include specific contract language, and generally give the buyer an opportunity to conduct a lead inspection (42 U.S.C. §4852d).
• Radon. The Illinois Radon Awareness Act requires sellers of residential property to provide specified radon information and disclose known radon test results and hazards (420 ILCS 46).
• Condominiums. When a condominium unit is resold, the Condominium Property Act requires the unit owner to make specified association documents and information available to the buyer, including the declaration, bylaws, rules, financial information, and information about pending assessments and litigation (765 ILCS 605/22.1).

These are separate obligations with their own rules. Completing one does not satisfy the others.

If a problem surfaces after closing

When a buyer discovers a serious defect after moving in, the first question is whether the seller knew about it. Evidence of knowledge can come from repair invoices, prior inspection reports, insurance claims, communications with contractors or neighbors, and the seller’s own answers on the report. A claim under the Act must be brought within one year from the earliest of the date of possession, the date of occupancy, or the date the deed was recorded (765 ILCS 77/60). Depending on the facts, claims for fraud or breach of contract may also be available, but they have their own requirements and deadlines, and the one-year clock under the Act runs quickly.

Buyers should preserve evidence of the defect before making repairs: photographs, contractor assessments, and any documents showing when the condition existed. Repairs made before the defect is documented can make the claim harder to prove.

Practical guidance for sellers

• Complete the report yourself and answer based on what you actually know. Do not guess, and do not leave applicable items blank.
• Gather repair records, permits, warranties, and prior inspection reports before listing. They help you answer accurately and show good faith.
• Deliver the report before the contract is signed, and keep proof of delivery.
• If something changes before closing, supplement the report promptly in writing.

Practical guidance for buyers

• Ask for the report before you sign, and read every answer, including the explanations.
• Treat “yes” answers as leads for your inspector and your attorney, not as the end of the inquiry.
• Get an inspection regardless of how clean the report looks.
• If the report arrives late and discloses a defect, calendar the five-business-day termination window immediately.
• Keep a copy of the report with your closing documents. If a problem appears later, it will matter.

Used well, the disclosure report reduces surprises for both sides. Treated as a formality, it becomes the document everyone reads for the first time after something has gone wrong.