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Radon test during a real-estate transaction checklist

A buyer and seller radon transaction checklist for reviewing prior results and building changes, selecting a qualified tester where required, choosing the lowest level that could be used regularly, following the real-estate test method and closed-house or device conditions, preventing and documenting interference, verifying device and laboratory records, interpreting the result with EPA and state guidance and arranging mitigation or further testing without describing a low result as zero risk.

6 items to check

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Prior radon reports, mitigation records and later building or HVAC changes are reviewed

Critical item

An older test may not represent current conditions or intended lower-level use.

Tester and device meet applicable state and professional requirements

Critical item

Transaction testing should use qualified practice and calibrated equipment.

Test location represents the lowest level that could be occupied regularly

Critical item

Placement should reflect buyer use and protocol restrictions.

Required closed-house, HVAC and test-duration conditions are documented

Critical item

Validity depends on controlled conditions.

Tamper and condition checks support confidence that the device was not moved or manipulated

Critical item

Real-estate testing should address interference risk.

Result, uncertainty and response follow EPA and state guidance and the contract

Critical item

Testing is the only way to know the level, and lower results are not zero risk.

Use within the transaction schedule. EPA’s March 2024 Home Buyer’s and Seller’s Guide addresses time-sensitive testing and potential interference; state rules may be stricter. Do not enter unsafe roofs, crawlspaces, attics, excavations or damaged structures; open energized equipment; operate unsafe combustion or pressurized systems; or treat a visual checklist as engineering, environmental clearance, appraisal, title review or legal advice. Contract deadlines and remedies require qualified local guidance.

Reference standards

  • The signed purchase contract and inspection contingency, applicable state and local real-estate and inspector rules, lender and insurer requirements, seller disclosures, permits and records, current CFPB and EPA consumer guidance, qualified specialist reports, property-specific conditions, and written agreements among buyer, seller, agents, attorneys, lenders and contractors
  • EPA Home Buyer’s and Seller’s Guide to Radon, March 2024, and state radon program

    • Tools

  • Purchase contract, disclosures, listing, inspection agreement, property records, permits, prior reports, repair receipts, warranties, insurance and utility information
  • Camera, flashlight, tape measure, notepad and owner-safe observation tools; specialist scopes, testing devices and laboratory services where appropriate
  • Independent home inspector plus qualified structural, roofing, HVAC, plumbing, sewer, electrical, pool, pest, environmental, septic and well professionals as the property requires

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