Radon mitigation costWhat a radon system costs to install and run
The EPA uses $1,826 as the cost to install an active soil depressurization system, the vent pipe and fan system EPA says is primarily used (2023 dollars), plus $206 a year to run it and $476 for a new fan every 10 years. Fixr.com puts active suction systems at $500 to $2,500. The EPA recommends fixing your home if radon is 4 pCi/L or higher.
How much does a radon mitigation system cost?
The U.S. Environmental Protection Agency's October 2025 cost analysis uses these figures for an existing home, in 2023 dollars:
| Item | Cost |
|---|---|
| Installation of active soil depressurization (ASD) | $1,826 |
| Operating costs per year | $206 |
| Fan replacement every 10 years | $476 |
| Testing, including post-mitigation tests | $169 |
Consumer cost sites give ranges rather than one figure. Fixr.com says active suction costs $500 to $2,500. Bob Vila (2022) says a radon mitigation system costs between $771 to $1,185, with the national average at $978. Prices depend on the foundation, how many suction points the house needs, and where the pipe has to run.
What does each radon mitigation method cost?
| Method | Typical cost | Source |
|---|---|---|
| Active suction (sub-slab depressurization) | $500–$2,500 (Fixr.com); $800–$2,500 (Bob Vila) | Fixr.com; Bob Vila |
| Drain tile suction | $800–$1,700 or more | Bob Vila |
| Sealed sump pump hole system | $800–$2,500 | Bob Vila |
| Block wall suction | $1,500–$3,000 | Bob Vila |
| Crawl space sub-membrane depressurization | $800–$3,000 | Bob Vila |
| Passive soil suction | $500–$2,500 | Bob Vila |
| Lower-level pressurization | $500–$1,000 | Fixr.com |
| Basement sealing for radon | $3,000–$5,000 | Fixr.com |
| Radon in well water (water mitigation) | $2,500–$4,000 | Fixr.com |
Bob Vila's figures are from a page last updated in July 2022, so treat them as older than the EPA and Fixr.com figures.
How does a radon mitigation system work?
The EPA says the method primarily used is a vent pipe system and fan (soil suction): the fan pulls radon from beneath the house and vents it outside. Sealing foundation cracks and other openings makes this kind of system more effective. Similar systems can be installed in houses with crawl spaces, where a plastic sheet (membrane) covers the dirt floor and the fan pulls air from under it. The right system depends on how the house is built.
How much does radon testing cost?
- Do-it-yourself test kit: a charcoal canister test costs $20 to $150 (Fixr.com).
- Professional test: inspectors usually charge between $100 and $400 (Fixr.com).
Test first. A system is only needed if the result is high, and the EPA says to test again after a system is installed to make sure it worked.
What radon level means I need a mitigation system?
The EPA recommends fixing your home if the radon level is 4 picocuries per liter (pCi/L) or higher. The EPA also says radon levels less than 4 pCi/L still pose a risk and in many cases may be reduced, and that most homes today can be reduced to 2 pCi/L or below. The U.S. Surgeon General has warned that radon is the second leading cause of lung cancer in the United States.
What does it cost to run a radon system?
The fan runs all the time. The EPA's analysis uses $206 a year in operating costs and $476 to replace the fan every 10 years (2023 dollars). Bob Vila says a radon fan can add between $30 and $300 to an energy bill each year. Most systems include a gauge or alarm that shows whether the fan is working, and the EPA suggests retesting every two years.
Do I need a permit?
Some towns require one. Bob Vila says permit fees typically range from $25 to $150. Your contractor should know whether your town requires one.
How do I choose a radon mitigation contractor?
The EPA recommends a contractor trained to fix radon problems and suggests checking with your state radon office for names of qualified or state-certified radon contractors. Ask for references and more than one estimate, and agree on a follow-up test after the system is installed. Requirements differ by state, so check what your state requires before you hire.
Related cost guides
- How much does crawl space encapsulation cost?
- Sump pump replacement cost: replacing a pump vs. installing a new one
- How much does basement waterproofing cost?
Common questions
How much does radon mitigation cost?
The EPA uses $1,826 to install an active soil depressurization system (2023 dollars). Fixr.com puts active suction systems at $500 to $2,500.
How much does it cost to run a radon mitigation system?
The EPA uses $206 a year in operating costs, plus $476 to replace the fan every 10 years (2023 dollars).
At what radon level should I get a mitigation system?
The EPA recommends fixing your home if the radon level is 4 pCi/L or higher. It says levels below 4 pCi/L still pose some risk.
How much does a radon test cost?
A do-it-yourself charcoal canister test costs $20 to $150 and a professional inspector usually charges $100 to $400, according to Fixr.com.
Does a radon system work in a house with a crawl space?
Yes. The EPA says similar soil suction systems can be installed in houses with crawl spaces. Bob Vila puts crawl space sub-membrane systems at $800 to $3,000.
Should I test again after a radon system is installed?
Yes. The EPA says to test again after the home is fixed to make sure radon levels went down, and suggests retesting every two years.
Sources
- U.S. EPA, Analysis of Benefits and Costs of Radon Reduction Strategies Recommended by the EPA (Oct 2025), Table 1, 2023 dollars — epa.gov, checked Nov 3, 2026
- U.S. EPA, A Citizen's Guide to Radon (EPA402/K-12/002, 2025 edition) — epa.gov, checked Nov 3, 2026
- Fixr.com, Radon Testing and Mitigation Cost (page updated Jan 31, 2025) — fixr.com, checked Nov 3, 2026
- Bob Vila, Radon Mitigation System Cost (page updated Jul 29, 2022) — bobvila.com, checked Nov 3, 2026
8 questions to ask any basement or foundation contractor
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