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      Bellevue, WA Radon Levels

      Check local Bellevue radon levels and find certified testing and mitigation professionals to keep your home safe

      Bellevue, WA Radon Facts

      EPA Radon Zone Zone 3 — Low Risk < 2.0 pCi/L (Zone 3)
      County King County, WA
      Zip Code 98004
      Avg. User Level 3.80 pCi/L
      User Tests 4

      Located in King County within the Seattle metro area, Bellevue has recorded an average radon level of 3.75 pCi/L, which falls within EPA recommended ranges but still warrants attention from homeowners. The area's glacial soils and mixed foundation types, from daylight basements to slab-on-grade construction, create varying radon accumulation patterns across zip code 98004. Even with moderate average readings, individual homes can exceed 4.0 pCi/L, making professional testing valuable for all residents.

      3.80
      pCi/L average
      Below EPA Action Level

      Based on 4 user-submitted radon tests for homes in Bellevue, WA. The EPA recommends taking action at or above 4.0 pCi/L.

      0
      4.0 EPA
      10+

      Bellevue, WA Radon Mitigation

      Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

      Need Radon Mitigation or Testing in Bellevue?

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      Bellevue, WA Radon Levels

      User-submitted radon test readings from homes in the Bellevue area.

      Radon LevelCityHome AgeFoundation
      2 pCi/L Bellevue, WA 21-50 Years Partial Basement
      5 pCi/L Bellevue, WA 21-50 Years Full Basement
      4 pCi/L Bellevue, WA 51-99 Years Partial Basement

      Have a radon test result for Bellevue? Submit your reading to help other homeowners.

      Radon FAQ for Bellevue, WA

      What is the average radon level in Bellevue, WA?
      Based on 4 user-submitted tests, the average radon level in Bellevue is 3.80 pCi/L. This is below the EPA's recommended action level of 4.0 pCi/L. However, we recommend all homes be tested regardless of your neighbor's results.
      What EPA Radon Zone is Bellevue in?
      Bellevue and the 98004 zip code are in King County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.
      How much does radon mitigation cost in Bellevue?
      Radon mitigation in Bellevue typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.
      Should I test for radon if I'm buying a home in Bellevue?
      Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

      Most Active Radon Markets in Washington

      Cities in Washington with the most user-submitted radon test data, ranked by number of submissions.

      CityAvg User Radon LevelSubmissions
      Vancouver 6.56 pCi/L 9
      Kent 3.50 pCi/L 6
      Olympia 7.00 pCi/L 5
      Seattle 5.25 pCi/L 4
      Bellevue 3.75 pCi/L 4
      Spokane 11.67 pCi/L 3
      Camas 8.00 pCi/L 3
      Centralia 7.00 pCi/L 3
      Bellingham 4.50 pCi/L 2
      Kirkland 4.50 pCi/L 2

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      Free Radon Mitigation Quote

      Or call for a free quote: 1-800-299-3578 Local: 425-242-4683

      A licensed contractor will contact you immediately.

      * Required