Purchase decision
Qualified professional test
Best when a deadline, contingency, state rule, or possible test interference makes defensible procedure important.
Find radon testing inspectors →Field guide · Radon checkpoint
Homebuyer Radon Testing Toolkit
Choose between an inexpensive first screen, a continuous household monitor, or a qualified professional test—without confusing one for another.
Start with the decision
Three testing paths, three different jobs
The EPA recommends that buyers know the indoor radon level of a home they are considering. The best tool depends on whether you need a quick screen, ongoing awareness, or transaction-grade documentation.
Lower-cost screen
Short-term test kit
Useful for a first check when you can follow the instructions and wait for any required laboratory result.
See this option ↓Ongoing awareness
Continuous monitor
Useful for watching longer-term patterns after move-in, after mitigation, or when conditions change.
Compare monitors ↓Option A · First screen
Short-term radon test kits
A passive kit can be an affordable starting point. Follow the placement, closed-house, timing, and mailing instructions exactly; a casual test is not a substitute for the procedure required in a real-estate transaction.
Amazon marketplace
Browse radon test kits
- Compare laboratory fees and return-mail requirements.
- Check the test duration against your purchase timeline.
- Verify any state-specific device or provider requirements.
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Option B · Watch the pattern
Continuous household monitors
Continuous monitors make it easier to see how readings change over days and seasons. These are homeowner tools, not guaranteed substitutes for professional transaction testing.
Simple on-device reading
10% off: MOD-10OFFAirthings Corentium Home
A battery-powered household radon monitor with readings shown on the device. A practical fit when you want continuous measurement without making Wi-Fi or a phone app part of the setup.
Connected trend tracking
5% off: MOD5OFFEcosense EcoQube
A plug-in continuous monitor designed around app-based trend viewing and remote access. It requires a 2.4 GHz Wi-Fi network and the EcoQube app for setup and results.
Affiliate disclosure: Master of Directories may earn a commission if you purchase through the Airthings or Ecosense links, at no added cost to you. Compensation does not affect inspector listings or directory rankings.
Before a home-purchase test
Use the testing checklist
- Ask for prior results, who performed the test, and where the device was placed.
- Note renovations or HVAC changes made since the previous result.
- Test the lowest level that could be used regularly, following the required protocol.
- Plan for interference controls when a seller or occupant remains in the home.
Questions buyers ask
Radon testing FAQ
Does a standard home inspection include radon testing?
Not always. Radon testing is often an optional service, so ask the inspector what is included and whether your state or purchase contract requires a particular testing protocol or credential.
Can a consumer radon monitor replace a professional test?
A consumer monitor can help you understand conditions over time, but it may not satisfy a real-estate contract, state rule, lender, or inspection contingency. For a transaction decision, confirm the required method and use a qualified radon tester when appropriate.
What radon level requires action?
The EPA recommends fixing a home when the radon level is 4 pCi/L or higher and notes that lower levels can still carry risk. Discuss the result with a qualified testing or mitigation professional before making a purchase or remediation decision.
Need a professional result for the transaction?
Browse local home inspectors who offer radon testing, then confirm their credentials and the protocol they use.