Radon Cost Guide 2026
What to expect to pay, what drives costs up or down, and how to get an accurate estimate.
Typical cost
$800 – $2,500per system
Radon test: $100–$200 (professional). Mitigation system: $800–$2,500 installed. Most homes can be mitigated with a single ASD system. Complex foundations or very high levels may require additional work.
What affects radon cost
Radon test: $100–$200 (professional). Mitigation system: $800–$2,500 installed. Most homes can be mitigated with a single ASD system. Complex foundations or very high levels may require additional work.
About radon projects
Radon is a naturally occurring radioactive gas that seeps into homes through foundation cracks, gaps, and porous concrete. It's the second leading cause of lung cancer after smoking, and the EPA recommends mitigation for any home testing at or above 4 pCi/L. Radon mitigation typically involves installing an active soil depressurization (ASD) system — a vent pipe and fan that draws radon from beneath the foundation slab and exhausts it above the roofline. Professional radon mitigation systems reduce levels by 80–99% and cost a fraction of what most homeowners expect. Testing is inexpensive and should be done in the lowest livable level of the home.
How to keep radon costs in check
- ✓Look for NRPP or NRSB certified radon measurement and mitigation professionals.
- ✓Ask about pre- and post-mitigation testing to verify the system achieves levels below 4 pCi/L.
- ✓Confirm the system includes a U-tube manometer or alarm to indicate fan operation.
- ✓Get a written warranty guaranteeing radon levels will remain below 4 pCi/L.
Cost FAQ
What is the average cost of radon work?
The average cost ranges from $800 to $2,500 per system. Radon test: $100–$200 (professional). Mitigation system: $800–$2,500 installed. Most homes can be mitigated with a single ASD system. Complex foundations or very high levels may require additional work.
Why do contractor estimates vary so much?
Material quality, project complexity, local labor rates, and contractor overhead all affect pricing. A 30–50% variance between bids on the same project usually means different scopes — get line-item estimates and compare carefully.
How can I lower the cost without sacrificing quality?
Schedule during off-peak times (spring and fall are busiest for most trades). Get 3+ competing bids. Avoid making scope changes after work starts. Supply your own materials if you can find better pricing (discuss with contractor first).
Does homeowner's insurance cover this work?
Typically only if the damage is sudden and accidental (storm, fire, burst pipe). Routine maintenance, wear and tear, and improvements are not covered. Check your policy for specifics.
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