Cost guide

Radon Mitigation Cost: Survey and State Data

Last reviewed November 2026. Primary sources were accessed November 3, 2026. Consumer-reported pages were accessed November 2, 2026. Dates are Mountain Standard Time (Phoenix).

Browse radon mitigation contractors with a license on record

These figures are national. They are not a price for a home in one state.

What the data shows

Radon has the strongest primary support of the four services: an industry survey, five state radon programs, an EPA model and a HUD program estimate. The state pages are not dated or are older, so confidence is capped for those rows.

The Radon Reporter industry survey, as summarized by AdeptPlus

Industry survey · 2024 data (published 2025) · Accessed Nov 3, 2026

Single-family mitigation cost, share of 2024 responses: $1,001–$1,500 21%; $1,501–$2,000 34% (24% in 2023); $2,001–$2,500 18%; $2,501–$3,000 13%; $3,001–$3,500 10%; $3,501 or more 11%; $1,000 or less 2%. About 55% of responses fall between $1,001 and $2,000. Read through AdeptPlus's summary of The Radon Reporter survey; the shares add to more than 100%, so treat them as approximate.

Confidence: Medium

North Carolina DHHS Radon Program

Government (state program) · Undated page · Accessed Nov 3, 2026

Average cost for a contractor to lower radon levels is about $1,500, range about $1,000 to $2,500.

Confidence: Medium

HUD FY2026 Congressional Justification: Lead Hazard Reduction

Government (program budget estimate) · FY2026 · Accessed Nov 3, 2026

Radon Testing and Mitigation Resident Safety Demonstration: $3,200 estimated cost per housing unit treated (rounded to hundreds), 600 units with carryover funding available in 2026. A program estimate for HUD-funded units, not a market price.

Confidence: Low

Typical range for homeowners

Typical installed system

About $1,000 to $2,000 (Wisconsin DHS (revised Oct 21, 2026))

How we derived it

Wisconsin DHS (revised Oct 21, 2026) states an average of $1,000 to $2,000, and the same band holds the state program averages ($1,200 in Kansas Radon Program (Kansas State University) and on the National Radon Program Services, Kansas State University page, $1,500 in North Carolina DHHS Radon Program), EPA's modeled $1,826 (EPA: Analysis of Benefits and Costs of Radon Reduction Strategies (Oct 2025)) and the two most common 2024 survey brackets ($1,001 to $1,500 and $1,501 to $2,000; The Radon Reporter industry survey, as summarized by AdeptPlus).

Outside the range

Pennsylvania DEP news release (Jan 9, 2025) and Illinois IEMA radon mitigation guide (2009 printing) put typical systems at $800 to $1,200, and several state ranges run up to $2,000 to $2,500. In the 2024 survey the $2,001 to $2,500 bracket was 18% of responses, so costs above $2,000 are common (The Radon Reporter industry survey, as summarized by AdeptPlus).

Confidence

High (several independent primary sources agree)

State radon programs publish different figures. The pages differ in date and method, so they are not comparable and do not show that one state costs more. This page publishes a national range only.

Consumer-reported estimates (secondary source)

Angi (updated Sep 28, 2026), This Old House (updated Nov 18, 2024) and Fixr (updated Jan 31, 2025). These are consumer-reported or editorial estimates, shown for comparison only; the headline range above does not rely on them. Angi and This Old House are not independent of each other.

Figure
Typical installed system (Angi)
Range
$805–$1,326; average $1,043 (1,184 Angi Pro projects)
Source(s)
Angi (updated Sep 28, 2026)
Confidence
Medium
Accessed
Nov 2, 2026
Figure
Electricity to run the fan
Range
$100–$300 per year (Angi); also $30–$300 per year on the same page
Source(s)
Angi (updated Sep 28, 2026)
Confidence
Low
Accessed
Nov 2, 2026

Where the sources disagree: Angi's headline range ($805–$1,326) sits at or below the primary-source ranges above, and Angi's next steps section says $400–$1,800 (Angi (updated Sep 28, 2026)). Fixr's headline of $650–$2,850 covers testing and mitigation combined, so it is not used here as a mitigation price (Fixr (updated Jan 31, 2025)). EPA: A Citizen's Guide to Radon (2016 edition) gives no dollar figure; it says most homes can be fixed for about the same cost as other common home repairs, and that cost varies widely.

What drives the cost up or down

Testing, inspection and DIY

Rows citing state programs, EPA and the industry survey are primary sources. Rows citing Angi and Fixr are consumer-reported.

What the agencies say about testing

FAQ

How much does a radon mitigation system cost?

Most sources put a typical installed system at about $1,000 to $2,000: Wisconsin DHS gives an average of $1,000 to $2,000 (Wisconsin DHS (revised Oct 21, 2026)), Kansas and North Carolina program pages give averages of $1,200 and $1,500 (Kansas Radon Program (Kansas State University) · North Carolina DHHS Radon Program), EPA models $1,826 (EPA: Analysis of Benefits and Costs of Radon Reduction Strategies (Oct 2025)), and 55% of 2024 industry survey responses fell between $1,001 and $2,000 (The Radon Reporter industry survey, as summarized by AdeptPlus). Pennsylvania and Illinois list $800 to $1,200 (Pennsylvania DEP news release (Jan 9, 2025) · Illinois IEMA radon mitigation guide (2009 printing)). Consumer-reported Angi data says $805 to $1,326 (Angi (updated Sep 28, 2026)). Crawl spaces, large homes and complex layouts can cost more.

What radon level means I should fix my home?

EPA recommends fixing at 4 pCi/L or more and considering it between 2 and 4 pCi/L (EPA: Radon action level).

How do I test, and what does it cost?

Start with a short-term kit. State-program kits cost $20 (short-term) and $30 (long-term) (National Radon Program Services, Kansas State University). A professional test is typically $150–$700 (Angi radon testing (updated Sep 23, 2026)).

My first test was high. What now?

EPA says to follow up with a second test before deciding (EPA: A Citizen's Guide to Radon (2016 edition)).

Can I install a radon system myself?

Wisconsin DHS says sub-slab depressurization is not a DIY project unless you have considerable contractor skills (Wisconsin DHS (revised Oct 21, 2026)). EPA suggests talking to your state radon office first (EPA: A Citizen's Guide to Radon (2016 edition)).

How do I know the system is working?

EPA says a post-mitigation test should be done within 30 days of installation, no sooner than 24 hours after the fan is running (EPA: Consumer's Guide to Radon Reduction). Retest about every two years after that (EPA: A Citizen's Guide to Radon (2016 edition)).

How we built these numbers

  • Source order: we start with government sources (EPA, HUD, state agencies), then public bid or contract unit prices (state contracts, school districts, cities), then industry survey data. Angi, HomeAdvisor, This Old House, HomeGuide and Fixr are shown only in a separate consumer-reported section and are not used to set the headline ranges.
  • Each figure in the tables is one we read on the cited page or document, with the source type, year, link, confidence and the date we accessed it (Mountain Standard Time, Phoenix). Where we found nothing, the table says Not found.
  • Typical ranges are our own arithmetic, with one sentence on how each was derived. We do not average bids of different scope, and a range is only as good as the sources it rests on, which is why each one carries a confidence rating.
  • Public bid prices are unit prices from institutional buyers, and they may include prevailing-wage rules and larger project sizes. They are examples of what contractors bid, not residential averages.
  • We do not use proprietary estimating databases such as RSMeans, Xactimate or HomeWyse, and we do not quote them.
  • We plan to add quotes collected from contractors in our directory later, and will label them as a separate source type.
  • Confidence key: High means a government source states the figure directly or two independent primary sources agree. Medium means one primary source read in full, or primary sources that agree only loosely. Low means dated before 2022, unclear scope, a program budget estimate or a single source. Consumer-reported rows are capped at Medium.
  • We refresh figures at least twice a year and show the last-reviewed date. Where a contractor listing is mentioned, the directory's phrase is license on record.

Sources

Contractors by state

These links go only to states where the directory currently lists radon mitigation contractors. The figures above stay national.

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