How Much Does Radon Mitigation Cost? (2026 Guide)

If your home has tested at or above the EPA action level of 4 pCi/L, mitigation is the logical next step. The good news: radon mitigation is effective, well-understood, and more affordable than most homeowners expect.

Typical Cost: $800 - $2,500

Most residential radon mitigation systems cost between $800 and $2,500 installed. The national average falls around $1,200 to $1,500 for a standard sub-slab depressurization system in a home with a basement or slab foundation. Crawl space systems and homes requiring multiple suction points tend to land on the higher end.

What’s Included

A standard installation typically covers a diagnostic inspection of the foundation, drilling one or more suction points through the slab, installing PVC vent piping routed to the exterior, a radon-rated inline fan, sealing visible cracks and openings in the foundation, and a post-mitigation radon test to verify the system is working.

Factors That Affect Cost

Several variables push the price up or down:

• Foundation type. Slab and basement installations are the most straightforward. Crawl spaces require sub-membrane depressurization, which involves laying and sealing a vapor barrier — adding both materials and labor.
• Number of suction points. Larger homes or those with complex foundations may need two or more suction points to achieve adequate pressure coverage.
• Pipe routing. If the vent pipe can run through a closet or garage to the roofline, costs stay low. Exterior pipe runs or routing through finished spaces cost more.
• Fan location and type. Fans installed in unconditioned attic space are standard. Systems where the fan must be installed outdoors or in hard-to-access locations add to labor.
• Local market. Pricing varies by region. Areas with high radon prevalence tend to have more competition among contractors, which can keep prices reasonable.
• New construction vs retrofit. Roughing in the same system during construction costs $550 to $1,500 — roughly a third of a typical retrofit. See radon mitigation in new construction (RRNC) for the build-phase decision.

Pricing varies significantly by market. See what contractors charge in Omaha, NE, Lincoln, NE, Indianapolis, IN.

Is It Worth It?

Radon mitigation systems are highly effective — most reduce levels by 80% to 99%. The system runs continuously and costs roughly $5 to $10 per month in electricity. Given the well-documented lung cancer risk from long-term radon exposure, mitigation is one of the most cost-effective health investments you can make for your home.

Find local radon mitigation contractors in your area to get a quote.

Codes and Standards Worth Knowing

The EPA’s radon program sets the national action level (4 pCi/L) that drives nearly every mitigation decision, and the American Association of Radon Scientists and Technologists publishes the consensus standards that mitigation systems are designed and tested against, including ANSI/AARST RMS-LB for residential mitigation and MAH for measurement that mitigation systems are designed and tested against. A mitigator who is AARST-certified and references the current ANSI/AARST standard for your installation type is working at trade-association level, not freelancing.

Frequently Asked Questions

Is radon mitigation covered by homeowners insurance? Generally no. Most homeowners insurance policies exclude radon mitigation because it’s considered a pre-existing environmental condition rather than sudden damage. A few policies offer environmental riders that include radon, but these are uncommon. Check your policy details — and factor the full out-of-pocket cost into your budget when getting quotes.

How long does a radon mitigation system last? The fan is the only moving part and typically lasts 5–10 years. The PVC pipe, sealing, and suction points last the life of the home. Most homeowners replace the fan once or twice over the life of ownership. Annual visual inspections and biennial radon testing keep the system performing properly.

Can I install radon mitigation myself? Technically yes, but it’s not recommended. Proper system design requires a diagnostic pressure test to confirm where suction points should go and how many are needed. An incorrectly placed suction point can fail to draw from the problem area. Most states also require post-mitigation testing by a certified professional. DIY errors can leave you with a system that doesn’t actually reduce your radon levels.

Does radon mitigation affect home resale value? A professionally installed and documented radon mitigation system is a selling point, not a liability. It signals that the previous owner took the issue seriously and resolved it. Buyers in high-radon markets expect mitigation in many homes — and an already-installed system avoids negotiation delays during closing.