Rhode Island Radon Rules for 2027: A Buyer and Seller Checklist
Rhode Island’s new radon requirements begin June 1, 2027. Learn what buyers and sellers should organize now for testing, disclosure, mitigation, and closing.
Buying or selling a home already comes with enough moving parts. A new testing rule can sound like one more surprise waiting at the closing table. Rhode Island buyers and sellers have time to prepare: the state’s new residential radon requirements apply to purchase and sale agreements executed on or after June 1, 2027.
The Rhode Island Association of REALTORS® published fresh implementation guidance on October 25, 2026. It explains how the law will affect testing, disclosure, mitigation, and closing preparation. Here is what the guidance means for a practical home-sale plan today.
What changes on June 1, 2027
For a covered residential real estate transaction, the law requires a radon test performed no earlier than one year before closing. The test must be completed by a certified or licensed professional; a do-it-yourself kit does not satisfy the transaction requirement described by RI REALTORS®.
The results must be made available to the buyer, seller, and any lender designated by the buyer. If the test shows an unsafe radon level, the law calls for a certified or licensed professional to install a mitigation system before closing when possible. If the work cannot be completed before closing, the estimated mitigation cost must be held in escrow and distributed under an agreement signed by the buyer and seller.
The legislation uses the U.S. Environmental Protection Agency action level of 4.0 picocuries per liter as the unsafe threshold. That standard and the statutory details are evergreen background; the new October 25 guidance is the current development.
Who normally pays for the test
The contract can set a different arrangement. Otherwise, the buyer generally pays when testing occurs after the purchase and sale agreement is signed and the seller has not supplied a qualifying certified test completed within one year before the agreement showing no unsafe radon level.
This detail belongs in the offer and closing conversation. Buyers should account for professional testing in their due-diligence plan. Sellers should gather any recent certified test or mitigation records before listing so the parties can determine whether those records meet the law’s timing and exemption rules.
Some transfers are exempt
The law includes exemptions, so the requirement should not be applied as a blanket rule to every transfer. Examples in the enacted text include certain foreclosure or court-ordered sales, transfers of homes intended for nonresidential conversion or demolition, and inheritances. It also addresses properties with qualifying mitigation systems and recent follow-up testing.
Whether a specific transaction qualifies depends on its facts and documents. Buyers and sellers should rely on their Rhode Island real estate attorney for legal interpretation and on the Rhode Island Department of Health for certified radon professionals and technical guidance.
A simple preparation checklist
For Rhode Island sellers
- Locate prior radon test reports, mitigation invoices, permits, warranties, and follow-up results.
- Ask the listing team and closing attorney whether an existing report fits the law’s timing and certification requirements.
- Discuss how a possible test or mitigation timeline may fit the intended closing date.
- Review the property’s positioning with a current [Rhode Island home-value consultation](/valuation) before choosing repairs or pricing assumptions.
For Rhode Island buyers
- Ask early whether the seller has a qualifying certified test or mitigation record.
- Keep professional testing and possible follow-up time in the due-diligence calendar.
- Confirm the testing-cost language in the purchase and sale agreement.
- Review [current Rhode Island homes for sale](/search-ri) with enough time to compare property condition, documents, and offer terms.
If you are planning a move before or after the effective date, explore the Rhode Island real estate market page and the team’s Rhode Island home-selling guidance for the next steps that fit your timeline.
What this means right now
The law is not yet in effect. The October guidance is a prompt to organize records and understand the closing process, not a reason to assume every home needs immediate work. RI REALTORS® says its revised purchase and sale agreements add a radon testing and mitigation section, with updated forms expected to reach vendors in mid-November 2026. Form availability can vary by vendor, so use the current form supplied by your attorney or real estate professional when you are ready to transact.
A calm plan now can prevent avoidable uncertainty later. For help aligning your Rhode Island search or sale with the upcoming requirements, schedule a real estate consultation with Luis De La Rosa, Associate Broker · REALTOR® with Brizo Real Estate Services, serving all Rhode Island and Southern Massachusetts.
Verified Sources
- Rhode Island Association of REALTORS® — “Rhode Island’s New Radon Law: What REALTORS® Need to Know Before June 2027” — published October 25, 2026; accessed October 26, 2026.
- Rhode Island General Assembly — 2026 S 2424 Substitute A, enacted statutory text — evergreen legal background; effective June 1, 2027; accessed October 26, 2026.
This article provides general real estate information and is not legal, medical, or environmental advice. Consult qualified professionals for guidance about a specific property or transaction.