Golden Star Home Inspections
Verified Pro
~10 years online5.0(813)
Radon Mitigation in Spokane, WA
Compare 22 radon mitigation contractors near you in Spokane 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
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Other Businesses in This Area
Radon Testing & Mitigation Solutions
2½+ years onlineBPG Inspections
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5.0Radon Mitigation Spokane WA
5.07+ years onlineRadon Solutions NW
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5.07+ years onlineRiver City Home Inspector
5.0Trinity Inspection LLC
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5.08+ years onlineHomeTeam of Spokane
4.9~31 years onlineAdvanced Radon Technologies Inc
4.821½+ years onlineEnviro Consulting Services
4.78½+ years onlineCavalier Corporation
4.5Radon Mitigation in Nearby WA Cities
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About Radon Mitigation in Spokane
Radon mitigation reduces radon gas levels in buildings, typically through sub-slab depressurization — a system that creates suction beneath the foundation to draw radon gas out before it enters living spaces. Radon is the second leading cause of lung cancer after smoking.
Typical costs: A standard sub-slab depressurization system runs $800–$2,500 installed. More complex situations (crawl spaces, multiple suction points) can be $2,000–$4,000. Radon testing before and after is typically included.
Common projects include:
- Sub-slab depressurization system
- Crawl space radon mitigation
- Radon testing and monitoring
- Sump pit sealing and venting
- New construction radon-resistant design
Many states require radon mitigation contractors to be specifically certified. Permits may be required for the system installation depending on jurisdiction.
Frequently Asked Questions
- How much does radon mitigation cost in Spokane?
- Most homes can be mitigated for $800–$2,500 with a sub-slab depressurization system. This includes the fan, PVC piping, sealing, and post-mitigation testing. The system runs continuously and costs about $50–$100/year in electricity. More complex jobs (crawl spaces, multiple foundation types) run $2,000–$4,000.
- How do I find a reliable radon mitigation contractor in Spokane?
- Use a certified radon mitigator (NRPP or state-certified). They should test before and after installation and guarantee results below 4 pCi/L (the EPA action level). Ask about fan warranty and what happens if the system doesn't achieve target levels.
- Do I need a permit for radon mitigation in Spokane?
- Requirements vary by state. Many states require radon contractors to be certified (not just licensed). Some require permits for the penetration through the foundation slab. Check your state's radon program for specific requirements.
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