Homeowner radon guide
Radon Testing and Measuring
Short-term kits, long-term devices, consumer monitors, and professional measurements serve different purposes. The right option depends on timing, the property, and applicable state or transaction rules.
Short-term and long-term tests
Short-term tests provide a snapshot; long-term tests can better characterize average conditions over changing seasons when time permits.
Professional measurement
A credentialed professional may be required or preferred for real-estate transactions, larger buildings, unusual conditions, or documented protocols.
Quality matters
Follow device placement, duration, closed-house conditions where required, laboratory instructions, and chain-of-custody requirements. Preserve the report.
What to do next
Use the cost estimator for planning or search for professionals whose recorded service area matches your ZIP code.
Content reviewed 2026-08-20. Educational information only; testing and a property-specific assessment are still required.