Summit County · Mountains
Breckenridge and Summit County homes face long winters, closed-up houses and many crawlspace foundations. These conditions can let radon build up indoors, and mountain properties often cost more to mitigate.
3 radon professionals listed · Updated November 2026
Serves Breckenridge, Summit County
Breckenridge-based company installing sub-slab, sub-membrane, sump-pit and new-construction radon systems.
NRPP credential and Colorado license listed (per company site and Summit County list)
Serves Silverthorne, Summit County
Silverthorne company offering radon, mold and asbestos testing, radon mitigation and mold remediation.
Colorado radon license (per Summit County Public Health list)
Serves Breckenridge, Copper Mountain, Dillon, Frisco, Keystone, Silverthorne, Vail, Eagle, Leadville
Radon mitigation division of Tiger Home and Building Inspections, founded in 2000.
NRPP-certified and Colorado-licensed (per company site)
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Many Summit County homes are built on crawlspaces or rocky lots, and many are second homes or short-term rentals that sit closed for long periods. Closed windows and heated air rising through the house during cold months can draw more soil gas inside.
Mountain installations take more planning. Exhaust pipes and fans must handle heavy snow and ice, and many HOAs have rules on where exterior pipes can run. Expect a contractor to discuss routing options with you or your HOA.
Fewer contractors are based in the high country, so travel charges are common. Testing a rental or second home in winter, when it is most likely to read high, gives the clearest picture.
Mountain homes often have crawlspaces, rocky soil and HOA rules on exterior pipes, and systems must be built for heavy snow. Contractors may also charge travel fees. Most Summit County jobs run $1,500 to $3,000.
Yes. Owners and guests are both exposed, and a test result gives you documentation for future buyers. Test during winter, when levels are typically highest.
Elevation itself is not the cause. Radon comes from uranium in the soil and rock beneath a home. Mountain construction, crawlspaces and closed-up winter conditions can let it build up indoors.
Colorado requires radon mitigation professionals to be licensed by the Department of Regulatory Agencies (DORA). Ask for the Colorado license number, look for NRPP or NRSB certification, get a written quote that includes a post-mitigation test, and ask about the fan warranty.
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