What state law requires on radon in 2026, what the EPA recommends, and how to capture it once at intake — not at closing
Radon disclosure in 2026 is a state-by-state patchwork. There is no federal statute that requires sellers to disclose radon (the EPA publishes guidance and a pamphlet, but the federal disclosure form is recommended, not mandated nationwide). State approaches range from required disclosure on the standard seller property disclosure form (Illinois, Florida, Minnesota, Maine, Rhode Island, New Jersey, and others) to required pamphlet delivery (Illinois Radon Awareness Act) to general material-fact obligations that pull radon in by implication. BuildMyListing captures radon test history and known issues at listing intake regardless of state, so the listing record matches whatever disclosure form is used at closing.
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Some states put radon front and center on the seller property disclosure form. Some require the EPA pamphlet be delivered before contract. Some treat radon as a general material fact. Most agents only learn the local rule when a buyer's inspector raises the question — by then the disclosure conversation is reactive, not preemptive.
BuildMyListing captures radon test history, known issues, mitigation systems, and seller knowledge at listing intake — regardless of state. The disclosure record matches whatever state form is used at closing, and the EPA pamphlet is linked for states that require delivery.
A short intake form captures whether the property has been tested, the most recent result, whether a mitigation system is installed, when it was installed, and seller knowledge of radon issues in neighboring properties.
Benefit: All radon data captured before contract, not after inspection
Direct link to the current EPA pamphlet 'A Citizen's Guide to Radon' for states (like Illinois under the Illinois Radon Awareness Act) that require delivery, plus a more general 'Home Buyer's and Seller's Guide to Radon' for elective use elsewhere.
Benefit: Pamphlet delivery is one click, not a separate email
If a mitigation system is installed, BuildMyListing prompts for the install date, contractor, and any post-mitigation test results. The system's presence is a positive selling feature; the test results substantiate it.
Benefit: Turn mitigation into a feature, not a question mark
The listing's disclosure footer cites the right state-level authority where applicable — the Illinois Radon Awareness Act, Florida statutory disclosure language, Maine radon notification, and others.
Benefit: Looks local in every market
Answer five questions about radon at listing intake: tested? when? result? mitigation installed? when?
Where applicable, the EPA pamphlet is linked to the listing record. Mitigation paperwork can be uploaded and saved.
When the state seller disclosure form is completed at closing, the answers match the listing record — no contradictions, no re-asking the seller.
| State Pattern | Example States | What's Required | How BuildMyListing Handles It |
|---|---|---|---|
| Radon on the seller property disclosure form | Illinois, Florida, Maine, Minnesota, Rhode Island, New Jersey, Pennsylvania | Seller answers radon questions on the standard form | Same questions on listing intake |
| Radon pamphlet delivery required | Illinois (Illinois Radon Awareness Act), and others by practice | EPA-approved pamphlet to buyer before contract | EPA pamphlet linked to disclosure step |
| Radon as general material fact | Most other states under common-law material fact doctrines | Known radon issues disclosed even without a specific form question | Intake captures known issues regardless |
| Disclosure of mitigation system | Most states with disclosure forms | Existing mitigation system disclosed | Mitigation prompt at intake + documentation upload |
| Federal layer | All 50 states (recommended, not mandated) | EPA recommends pre-purchase testing and disclosure | EPA guidance linked from disclosure record |
Scenario: Illinois single-family listing where the seller has never tested for radon.
Process: Intake records 'not tested' → Illinois Radon Awareness Act flag fires → EPA pamphlet attached to disclosure record → seller acknowledges receipt
Compliance: Pamphlet delivery is documented even though the property has no test result yet.
Scenario: Pennsylvania home with a passive mitigation system installed at construction.
Process: Intake records mitigation system + install date → photos of the vent and fan attached → seller disclosure carries the same information
Compliance: Mitigation system is a selling point with documentation, not a question mark on inspection.
Scenario: California listing where the seller's family member raised radon concerns.
Process: California does not have a radon-specific disclosure form requirement, but BuildMyListing captures the seller's concerns as a material-fact item → seller chooses to disclose voluntarily
Compliance: Voluntary disclosure preempts the question if a buyer's inspector tests.
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