Best Radon Pros in Portland, OR

Local Contractor Market

We track 7 local contractors. The strongest service coverage is 86% testing and measurement and 57% mitigation installs.

Typical Mitigation Cost

Homeowners in Oregon often report radon mitigation quotes in a general range of $1,200–$2,800 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. Oregon includes Zone 1 and Zone 2 areas, with higher potential in several eastern and inland counties.

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

When to Test in Portland

Oregon 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.