Radon Inspections

Trustworthy Home Inspections Since 1996!

Radon Inspections

Radon is a naturally occurring radioactive gas.  When elevated, it becomes the second leading cause of lung cancer.  It is a tasteless and odorless gas derived from the radioactive decay of radium.

What To Expect

  • Testing during a real estate transaction requires a short-term radon test.
  • A continuous radon monitor (CRM) is placed in the lowest possible living area of the home.
  • The testing period is a minimum of 48 hours.
  • Results will indicate an EPA level that is either safe or elevated
  • Homes where the lowest living area exceeds 2,000 square feet, a second monitor will be used.
  • Mitigation and/or retesting will be recommended for elevated levels.
  • PVC piping and an inline fan are installed to keep radon levels at a safe level, below 4.0 pCi/L.

What Will It Cost?

Radon Inspection fees vary based on the size of the lowest level. Prices may be subject to change based on unforeseen variables.

Prices range from $160 – $260

Please contact our office for a detailed list of all items included in your Radon Test. Prices may be subject to change based on unforeseen variables. 

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STL Home Inspector & Inspections – Castle Home Inspections

725 Mississippi Avenue, Crystal City

4.9 593 reviews

  • Avatar Robert Rippee ★★★★★ in the last week
    Liz was very nice and helpful on the phone. And Steve was fantastic!!! He put my mind at ease. Took his time and explained everything to me. Found the smallest window … read more lock issue to the bigger issues with the roof. I would recommend Castle again and again!
  • Avatar Jessica Thatcher ★★★★★ a week ago
    Jack was amazing. I’m a first time home buyer and he walked through everything. I was able to follow along point out some concerns of mine. He found vermiculite … read more in the attic and provided me with some information so I can get it remediated. The gentleman that did my termite inspection was just as good.
  • Avatar Tangela Vickers ★★★★★ a week ago
    Great experience! The inspector was very thorough and informative. I walked away from the experience feeling more educated about the home which made me feel better … read more about the purchase.
  • Avatar Haley Viner ★★★★★ a week ago
    Steve with Castle Home inspection was the best! He was very informative and explained everything to us with his professional opinion but didn’t steer us in one direction … read more or another. He just let us know as first time home buyers what would be best in our situation. 10/10!!!

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