Is radon testing required when buying a home?

While no state mandates radon testing during a home purchase, over 37 states require disclosure of known radon test results. The EPA recommends testing every home before purchase, and most real estate professionals in high-radon areas consider it standard practice.

Who pays for radon testing in a real estate transaction?

Typically, the homebuyer pays for radon testing as part of their inspection costs. However, some sellers choose to test proactively before listing to address any issues upfront. If mitigation is needed, the cost is often negotiated between buyer and seller.

What happens if radon is found during a home sale?

If elevated radon is found, it's typically not a deal-breaker. Buyers commonly request that the seller install a mitigation system before closing (usually $800-$2,500), or negotiate a credit toward mitigation costs. This is a normal part of real estate negotiations in high-radon areas.

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Real Estate Radon Testing

Fast, certified radon testing designed for real estate transactions. Meet buyer requirements and disclosure obligations with confidence.

Typical Cost$150 – $400

Timeframe48-hour test, results same day

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About Real Estate Testing

Radon testing during a real estate transaction requires speed, accuracy, and certified results that all parties trust. Professional real estate radon testing uses tamper-resistant continuous monitors, meets EPA and AARST protocols, and delivers certified results within 48 hours — fitting within standard inspection contingency timelines. Over 37 states require radon disclosure during home sales.

Inspector performing real estate radon test

Key Benefits

Certified results accepted by buyers, sellers, lenders, and attorneys

Tamper-resistant monitors prevent interference during the test

48-hour turnaround fits standard inspection contingency windows

Detailed report with hourly readings and professional certification

Helps sellers disclose proactively and avoid deal delays

Gives buyers confidence in their largest investment

How It Works

Coordinate testing with your real estate agent and the listing agent

Certified technician places tamper-resistant CRM in lowest livable level

Closed-home conditions maintained for minimum 48 hours

Monitor records hourly radon readings with tamper detection

Results report generated with professional certification

If levels are elevated, mitigation estimate can be provided immediately

Expedited mitigation available for time-sensitive closings

Ideal For

Homebuyers during the due diligence or inspection period
Sellers wanting to proactively test before listing
Real estate agents advising clients in high-radon areas
Transactions in states requiring radon disclosure
Bank or lender-required radon testing

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