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Illinois Residential Purchase Agreement

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Updated June 12, 2025

An Illinois residential purchase agreement is a legally binding contract between the buyer and seller of a residential property. Provisions set forth in the agreement include pricing, financing, closing terms, inspections and surveys, property conditions, and more.

State Laws

Material Defects Affecting Health or Safety – The seller is required to disclose all material defects that they have knowledge of. This includes any conditions that would have a substantial adverse effect on the value of the property or affect the health or safety of occupants.[1]

Seller’s Disclosures (5)

Property Disclosure Report (required) – This disclosure form must be completed by the seller and provided to the buyer before a purchase and sale agreement is signed.[2] Neither party has the right to waive this step in the process of the sale.[3]

Download: PDF

Radon Testing Guidelines (required) – The buyer is required to receive guidance on radon testing procedures.[4]

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Radon Hazards (Disclosure of Information) (required) – Radon disclosure that must be completed by the seller.[5]

Download: PDF

Lead-Based Paint Disclosure (conditional) – A federally-required disclosure form that sellers must provide to potential buyers if their property was constructed before 1978.[6]

Download: PDF

Lead-Based Paint Pamphlet (conditional) – Gives general information about lead-based paint for properties built before 1978.[7]

Download: PDF

Sample

Download: PDF, MS Word, ODT

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