Understanding the limits of a condominium unit disclosure
Navigate Illinois condominium disclosure requirements and seller liability for material defects when preparing your residential unit for a potential sale.
The short answer
In Illinois, the Residential Real Property Disclosure Act requires sellers to provide a written report regarding material defects before contract signing. However, this disclosure does not cover condominium common elements, focusing instead on unit-specific knowledge. Sellers are not required to conduct independent investigations and incur no liability for inaccuracies if they lack actual knowledge of the defect.
Scope of the Disclosure Act
The Act applies to residential properties including condominiums. It mandates that sellers provide a disclosure report before a buyer signs a contract. This requirement covers properties with one to four dwelling units. It ensures prospective buyers have information on material defects that could significantly affect safety or property value.
Knowledge-Based Liability
Sellers are responsible for disclosing material defects of which they have actual knowledge. They are not required to perform new inspections. If a seller reasonably believes a defect was corrected or relies on professional assessments, they are generally not liable. Sellers are responsible for disclosing material defects of which they have actual knowledge, as they are not required to perform independent investigations.
Condominium Limitations
Importantly, the standard residential disclosure form is not intended to cover common elements of a condominium. These areas, such as roofs or hallways, are managed by the Board of Managers. You should confirm with your association which elements are deemed 'common' versus 'unit-specific' when completing your paperwork.
Managing Supplemental Disclosures
If you discover an error after delivering the initial report, you must provide a written supplement before closing. If a material defect is disclosed late, the buyer may have a 5-day termination right. Work with your legal counsel to draft these supplements to ensure they meet the statutory requirements for accuracy and timeliness.
Decision Worksheet: Disclosure Planning
To prepare, list all known repairs made to your unit. (1) Is the condition a material defect (affecting health/safety)? (2) Did you personally witness the defect? (3) Do you have professional documentation of a prior repair? (4) Are the items listed limited to your unit interior? Use this to cross-reference your disclosure form draft.
Checklist
- Verify your property qualifies for mandatory disclosure.
- Check that your report only covers your specific unit.
- Ensure the disclosure is delivered before the contract is signed.
- Keep records of all delivered documents and delivery methods.
- Review your supplemental disclosure obligations if new information arises.
Common questions
Am I liable for defects in common areas?
Generally, no. The disclosure form is designed for individual units and the Residential Real Property Disclosure Act excludes common elements from these specific unit disclosures.
What if I accidentally omit a known defect?
If you become aware of an omission, you must provide a written supplemental disclosure before closing. Knowing misrepresentation can lead to liability for damages and court costs.
Sources
- Illinois Residential Real Property Disclosure ActChecked October 12, 2026
- Illinois Condominium Property Act — 2025 editionChecked October 12, 2026
- IEMA-OHS — Real estate radon guidanceChecked October 12, 2026
- EPA — Real estate lead-hazard disclosuresChecked October 12, 2026
This guide is general educational content from SQFT IO, prepared with AI assistance. It is not legal, tax or loan advice. Talk with a licensed attorney, tax professional or lender about your situation. SQFT IO Illinois license 478.027617.