A county map or a neighbor’s result cannot tell you the radon level in a specific home. Radon is a naturally occurring radioactive gas that enters buildings from the ground, and testing is the practical way to learn what is happening.
Test the lowest lived-in level
Follow the test manufacturer’s placement and closed-house instructions or hire a qualified professional. A real-estate transaction may use a short-term test, while longer testing can provide a broader picture of average exposure.
Treat mitigation as a scope, not a mystery
If results are elevated, request a written mitigation design and post-installation test. Pricing can depend on foundation type, crawl spaces, slab layout, sealing needs, fan location, electrical work and the route for vent piping.
Ask about ongoing operation
A mitigation fan uses electricity and eventually needs replacement. Confirm the system indicator, warranty, expected fan life, discharge location and a retesting schedule.
The HomeCostGrid view
Put testing and a possible mitigation allowance into the inspection budget for every state. Do not waive the question because a home is new, has no basement or sits in a supposedly low-risk area.
