Key Takeaways
- Federal lead paint disclosure is required for homes built before 1978
- Illinois Radon Awareness Act requires radon disclosure pamphlet for all residential sales
- Buyers must have opportunity to test for radon (no specific time period required)
- The radon disclosure form must be signed by both buyer and seller
- Sellers are NOT required to test for radon—only disclose known results
Last updated: January 2026
Lead Paint & Radon Disclosure
Illinois has specific environmental disclosure requirements beyond federal law.
Federal Lead Paint Disclosure
When Required
| Property | Required? |
|---|---|
| Built before 1978 | YES |
| Built 1978 or later | NO |
| Non-residential | NO |
Required Elements
| Element | Description |
|---|---|
| Lead disclosure form | Seller's knowledge |
| EPA pamphlet | "Protect Your Family From Lead in Your Home" |
| 10-day inspection | Buyer's right to inspect |
| Signature | Both parties sign |
Seller Disclosure
| Must Disclose | Not Required |
|---|---|
| Known lead paint | Test for lead |
| Known lead hazards | Remove lead |
| Test results | Warrant lead-free |
| Records | Conduct inspections |
Illinois Radon Disclosure
Radon Awareness Act
| Requirement | Details |
|---|---|
| All residential sales | Must provide pamphlet |
| Radon disclosure form | Must complete |
| Known test results | Must disclose |
| Mitigation systems | Must disclose |
Radon Disclosure Requirements
What Must Be Provided
| Document | Purpose |
|---|---|
| Radon pamphlet | IEMA publication |
| Disclosure form | Known information |
| Test results | If tests conducted |
| Mitigation info | If system exists |
Seller's Duties
| Must Do | Not Required |
|---|---|
| Provide pamphlet | Test for radon |
| Disclose known results | Install mitigation |
| Disclose mitigation | Guarantee safe levels |
| Answer questions | Expert knowledge |
Form Requirements
| Element | Details |
|---|---|
| Radon disclosure form | State-approved |
| Signatures | Buyer and seller |
| Date | When signed |
| Acknowledgment | Receipt of pamphlet |
Testing
Buyer's Rights
| Right | Details |
|---|---|
| Test for radon | Before closing |
| Negotiate | Based on results |
| No required period | Unlike lead (10 days) |
| Professional testing | Recommended |
EPA Radon Levels
| Level | Action |
|---|---|
| Below 2 pCi/L | No action needed |
| 2-4 pCi/L | Consider mitigation |
| Above 4 pCi/L | Mitigation recommended |
Note: EPA recommends action at 4 pCi/L or above, but any level carries some risk.
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Test Your Knowledge
For which properties must the Illinois radon disclosure pamphlet be provided?
A
B
C
D
Test Your Knowledge
Is a seller required to test for radon before selling their home in Illinois?
A
B
C
D