Best Radon Pros in Denver, CO

Local Contractor Market

We track 30 local contractors. The strongest service coverage is 87% testing and measurement and 40% mitigation installs.

Typical Mitigation Cost

Homeowners in Colorado often report radon mitigation quotes in a general range of $1,400–$3,000 for most single-family homes. Actual pricing depends on foundation type, pipe routing, fan placement, system design, and local labor conditions. Get at least two written quotes from certified contractors for an accurate comparison.

EPA Zone / County Risk

Primary state-level EPA reference: Zone 1. Most of Colorado's Front Range corridor is EPA Zone 1 — the highest risk classification. Colorado has one of the highest radon testing rates in the country.

EPA zone maps are county-level screening tools. Home-level testing is still required to confirm risk.

When to Test in Denver

Colorado is generally mapped as higher-potential radon territory (Zone 1), so annual-to-biannual testing is common after mitigation or major foundation changes. For seasonal timing, closed-house winter testing usually captures worst-case indoor buildup. For real-estate transactions, run a short-term test during due diligence, then confirm with follow-up testing if results are near or above 4.0 pCi/L.