Radon Inspections

Radon Inspections for Greater St. Louis

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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 home inspection.

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725 Mississippi Avenue, Crystal City

4.9 439 reviews

  • Avatar Eric Hucker ★★★★★ 2 weeks ago
    Excellent service. Took the time to answer all questions thoroughly and explain each step. Gave us honest feedback and a realistic picture of the state of the home. Would recommend!
  • Avatar Debra Arnold ★★★★★ 3 weeks ago
    Eric was quick and thorough, friendly and knowledgeable. Made us feel good about our new home purchase.
  • Avatar Trynai Braselman ★★★★★ 3 weeks ago
    I can't say enough about this company but I will definitely try! They were recommended by my realtor, whom I trust and after doing my own research decided to hire them as part of our home buying journey. The inspector (Eric) 😊 was … More amazing! He was thorough, knowledgeable and walked us through each part of the process. I felt that he truly looked out for our best interest and and the investment of purchasing a home. He made this part of the process easy for us and offered professional support and knowledge. I would absolutely use this company in any future endeavors that we encounter and will be recommending them to family and friends.
  • Avatar Christin Saltzman ★★★★★ 3 weeks ago
    The office staff are extremely nice and helpful. Jack was very thorough and took his time making sure everything was right. They got us in right away and made the process quick and easy! We are very pleased.
  • Avatar Jessica Edwards ★★★★★ a month ago
    When purchasing our house we are so thankful to have had Jack Rothweiler and Liz Rothweiler by our side during the process with Castle Home Inspections. They were easy to get ahold of, friendly, timely, and most importantly trustworthy … More and dependable. They not only complete their job duties but go above and beyond in explaining everything that goes into it along the way to help you better understand the home inspection process. They are also like a one stop shop which is so convenient, they work with other highly reputable companies for all of the other necessary services, termite, septic, sewer lateral, radon, you name it. It is so incredibility important to have a home inspection when buying a home. We are so grateful for you. Thank you again for making the home inspection process a breeze!
  • Avatar Will McQuigg ★★★★★ 2 months ago
    We had Steve Armstrong for our inspection. Steve and his team did a great and thorough job of inspecting the home and going over details. Being first-time homebuyers, Steve answered questions we had as we went and educated us on things … More we didn’t know.

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