How Much Does Radon Mitigation Cost?
Last updated: June 3, 2026 by the How Much Does That Cost? editorial team. Estimates are informational - see our methodology.
A radon mitigation system costs between $875 and $2,450 to install, averaging around $1,500 for a standard sub-slab depressurization system in a basement or slab-on-grade home. Foundation type and how many suction points the system needs are the main factors in price.
Crawlspace homes typically need an added vapor barrier along with the depressurization system, and larger or multi-sectioned foundations sometimes require more than one suction point, which raises the cost above a simple single-point system.
Quick Answer
Typical range: $875 – $2,450
Low end
$700
High end
$3,500+
Actual pricing varies by location, project size, materials, labor rates, and job complexity. Use the calculator below for an estimate tailored to your project.
Radon Mitigation Cost Calculator
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Estimated Project Cost
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Typical estimate: —
This is an estimate, not a quote. Actual pricing depends on your specific project details and local contractor pricing.
Cost Breakdown
How a typical project budget breaks down by category.
| Category | Estimated Cost |
|---|---|
| Fan unit & PVC piping | $300 – $700 |
| Labor (suction pit, pipe run, sealing) | $500 – $1,500 |
| Electrical hookup for fan | $50 – $150 |
| Post-installation radon test | $25 – $100 |
What Affects the Cost
Foundation type
Basements and slab-on-grade foundations typically get a straightforward sub-slab depressurization system, while crawlspaces need an added sealed vapor barrier and block foundation walls may need a drain tile-based system, both of which add cost.
Number of suction points needed
Larger homes or foundations divided into multiple sections (such as an addition with a separate footing) sometimes need more than one suction point to effectively reduce radon levels throughout the home.
Initial radon level
Homes with very high initial radon readings may need a more robust fan and system design to reliably bring levels below the EPA action guideline of 4 pCi/L.
Venting route complexity
Routing the vent pipe from the suction point through interior walls and out through the roof costs more in labor than routing it up an exterior wall, but often looks better and performs slightly better.
Sump pit sealing
Homes with an existing sump pump pit usually need it sealed with an airtight lid as part of the system, which is often bundled into the installation but adds some cost for specialized fittings.
DIY vs. Hiring a Professional
Doing it yourself
Homeowners can and should DIY the initial radon test using an inexpensive short-term test kit ($15-$25) to confirm whether mitigation is needed, but installing the mitigation system itself is generally left to a certified professional, since it involves sealing foundation cracks, drilling into the slab, and running dedicated electrical wiring for the fan.
Hiring a professional
An NRPP- or NRSB-certified radon mitigation contractor designs the suction point placement, seals the foundation properly, and verifies the finished system brings radon levels below the recommended threshold, typically completing installation in a single day.
Bottom line: Test for radon yourself first, but hire a certified radon mitigation professional for the installation — a poorly sealed or undersized system may not actually lower radon levels, which defeats the purpose.
Ways to Save
- Buy your own short-term radon test kit for $15-$25 to confirm elevated levels before paying a contractor for a professional assessment.
- Get quotes from at least 2-3 NRPP- or NRSB-certified mitigation contractors, since pricing for a similar single-point system can vary noticeably.
- Ask your state radon program about free or discounted test kits and, in some states, low-cost mitigation loan or grant programs.
- Combine mitigation installation with other planned basement work, like waterproofing or finishing, to potentially share some labor costs.
- Confirm the contractor includes a post-installation radon test in the price rather than charging separately for it.
How We Estimated This Cost
We model each calculator from public price ranges, labor data, material pricing, industry surveys, and the regional adjustment method explained in our methodology. Estimates are reviewed for consumer usefulness, then shown as ranges because local quotes, site conditions, materials, and timing can change the final price.
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Frequently Asked Questions
How much does radon mitigation cost?
The average radon mitigation system costs about $1,500, with most homeowners paying between $875 and $2,450 depending on foundation type and system complexity.
How does a radon mitigation system work?
Most systems use a sub-slab depressurization method: a suction point is drilled through the foundation slab, connected to a vent pipe and fan that pulls radon gas from beneath the home and safely vents it above the roofline.
Is radon mitigation worth it?
Yes — radon is the second-leading cause of lung cancer in the United States after smoking, and a properly installed mitigation system typically reduces radon levels by 80-99%.
How long does it take to install a radon mitigation system?
Most radon mitigation systems are installed in a single day, typically 4-8 hours, depending on the number of suction points and the routing of the vent pipe.
Does a radon mitigation system affect home resale?
An existing, properly functioning radon mitigation system is generally seen as a plus by buyers in high-radon areas, since it addresses a common home inspection finding before it becomes a negotiation point.