Updated November 2026 · Sources
A radon mitigation system for a typical home usually costs about $800 to $3,000, according to the estimates published by state agencies, university extension services and cost surveys. The price depends on your foundation, how high the radon level is and local labor costs. Below are the published figures, what changes the price and how to save.
Published radon mitigation cost estimates
| Source | Typical cost | Notes |
|---|---|---|
| Pennsylvania DEP (January 2026) | $800 to $1,200 | Permanent mitigation system in Pennsylvania |
| University of Georgia Extension (Circular 1065, revised November 2025) | About $1,500 on average; $900 to $3,000 | Depends on home complexity, radon level and local labor and materials |
| Angi cost data (2025) | $786 to $1,275; average $1,030 | National survey of homeowner-reported costs |
| U.S. EPA | No dollar figure | “Most homes can be fixed for about the same cost as other common home repairs” |
What homeowners actually paid: Pennsylvania records
Pennsylvania is the only state we know of that publishes the reported cost of every radon mitigation system installed by certified contractors. Here is the median cost by year from the PA DEP mitigation database:
| Year installed | Systems with a reported cost | Median cost |
|---|---|---|
| 2026 (through October) | 4,006 | $1,445 |
| 2025 | 6,216 | $1,400 |
| 2024 | 6,828 | $1,300 |
| 2023 | 6,226 | $1,204 |
| 2022 | 6,176 | $1,195 |
| 2021 | 8,008 | $1,095 |
| 2020 | 8,854 | $1,040 |
| 2019 | 10,449 | $975 |
| 2018 | 10,759 | $950 |
| 2017 | 11,409 | $905 |
| 2016 | 11,682 | $895 |
The median cost rose from $895 in 2016 to $1,445 in 2026. See the median cost in your county on our Pennsylvania county pages.
Cost by mitigation method
The most common system is active soil depressurization (also called sub-slab depressurization): a pipe and fan pull radon from under the foundation and vent it above the roof. Other methods are used for crawl spaces or special cases. Angi’s 2025 cost data gives these ranges:
| Method | Typical cost range |
|---|---|
| Active soil depressurization (sub-slab) | $1,000 to $3,000 |
| Passive depressurization | $500 to $2,500 |
| Sealing the basement | $400 to $4,600 |
| Wall-based systems | $500 to $3,000 |
| Ventilation systems | $1,300 to $2,500 |
| Radon in water (well water treatment) | $1,200 to $5,000 |
| Crawl space encapsulation | $1,500 to $15,000 |
What changes the price
- Foundation type: a basement or slab with good gravel under it is usually the simplest; crawl spaces and mixed foundations need more work.
- Number of suction points: large homes, or soil that air does not move through easily, may need more than one.
- Fan and pipe route: running the pipe through the garage and attic, or up the outside wall, changes labor and materials.
- Radon level: very high readings can call for a stronger fan or extra suction points.
- Local labor costs and licensing: prices vary by region, and some states require licensed or certified mitigators.
How much does a radon test cost?
- Do-it-yourself short-term kits: about $8 to $15 at Illinois county health departments and hardware stores (Shaw Local, January 2026); about $20 to $30 in Pennsylvania (PA DEP, 2026).
- Free kits: several states offer free kits at times, for example Colorado, Iowa, Tennessee and Washington, DC. Check your state page.
- Professional testing: costs more, and is common during home sales. Use a certified or state-licensed tester.
Help paying for radon mitigation
Some states have programs for low-income homeowners. For example, Colorado’s Low Income Radon Mitigation Assistance (LIRMA) program has provided up to $1,500 toward mitigation for qualifying owner-occupied homes. Ask your state radon program what is available where you live.
How to choose a contractor
- Hire a mitigator certified by the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB).
- Some states require a state license or certification, including Illinois, Ohio, Pennsylvania, New Jersey and Minnesota.
- Get at least two written estimates, and ask what is included: fan, piping, sealing, electrical work, permit and a post-installation test.
After the system is installed
Test again after the system is running to confirm it works. Pennsylvania DEP recommends testing every two years after a system is installed, and the American Lung Association gives the same advice for homes with a mitigation system.
Frequently asked questions
How much does radon mitigation cost on average?
Published estimates range from about $800 to $3,000 for a typical home. In Pennsylvania, where every certified installation is reported, the median cost was $1,445 in 2026. Pennsylvania DEP says $800 to $1,200, University of Georgia Extension gives an average of about $1,500, and Angi’s 2025 data shows a national average of $1,030.
Is radon mitigation worth it?
The EPA recommends fixing your home if the radon level is 4 pCi/L or higher, and considering a fix between 2 and 4 pCi/L. The EPA estimates radon causes about 21,000 lung cancer deaths a year in the U.S.
Can I install a radon system myself?
Some homeowners do, but several states require a licensed or certified professional for work done for others, and a professional install is more likely to reach a low level on the first try. Always retest after any fix.
How much does a radon test cost?
Do-it-yourself kits typically cost about $8 to $30, and some states give free kits. Professional tests cost more.
Sources
- PA DEP: Radon Mitigation System database (data.pa.gov) (retrieved November 2026)
- Pennsylvania DEP: Radon Action Month release (January 12, 2026)
- University of Georgia Extension: Radon Mitigation Dos and Don’ts (C1065) (revised November 25, 2025)
- Angi: How much does a radon mitigation system cost? (2025 data)
- U.S. EPA: How much can a radon mitigation system cost? (updated September 16, 2026)
- Shaw Local: Illinois radon test kit prices (January 2026)
- American Lung Association: Radon Action Month in Iowa (January 23, 2026)
- SOSRadon.org: Colorado radon program fact sheet (LIRMA)
- U.S. EPA: Health Risk of Radon