HomeGuard Environmental WA
Verified Pro
3+ years online5.0(123)
Radon Mitigation in Seattle, WA
Compare 33 radon mitigation contractors near you in Seattle and surrounding area with an average rating of 4.9/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 23, 2026
Most pros respond within 2–24 hours
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4.9Environix
4.923+ years onlinePillar To Post Home Inspectors - The Christensen Team
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4.92½+ years onlineRobinson Restoration - Seattle
4.9~6 years onlineAdvanced Radon Technologies Inc
4.8~22 years onlineEnvironment Control North Seattle Restoration Services
4.821½+ years onlineFirst Response Water Damage Repair
4.8~18 years onlineSERVPRO of West Seattle and Burien
4.829+ years onlineSERVPRO of Seattle NE
4.729+ years onlineSERVPRO of Downtown Seattle
4.629+ years onlineRadon Mitigation in Nearby WA Cities
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Radon Mitigation in Seattle, WA
Radon mitigation in Seattle serves a Puget Sound market: Victorian and Craftsman homes (basement-construction common), mid-century homes, modern condos, and commercial properties. King County is in EPA Zone 1 (highest predicted levels). Testing finds elevated radon in 25-35% of basement homes. Typical jobs include sub-slab depressurization for basements.
Residential radon mitigation in Seattle runs $2,000-$4,500. Washington requires a Specialty Contractor registration. Seattle permits for electrical work.
Frequently Asked Questions
- Does Seattle have radon?
- EPA Zone 1 — highest predicted. 25-35% of basement homes test elevated.
- Why are Seattle costs higher?
- Labor, permits, urban access.
- What's typical cost?
- $2,000-$4,500.
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NeedInstall helps connect customers with local installation professionals across Seattle and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.