Radon testing and mitigation in Flathead County, MT

3 certified radon testers and mitigation contractors in Flathead County, MT. Mitigation contractors are listed first.

3 certified prosUpdated October 2026Source: state certification lists and the NRPP directory

Pros in this state come from the NRPP national certification directory (checked Oct 28, 2026). Get Radon Quotes is independent and not affiliated with NRPP. Some states also require a state license, so confirm with your state radon office before you hire. Your state radon office.

3 certified pros near Flathead County, MT

Big Mountain Insulators, Inc.

Whitefish, MT

Certified mitigation

Get a quote (406) 261-7846 Directions

Claim, correct or remove

Flathead Valley Radon

Lakeside, MT

Certified mitigation

Get a quote (406) 570-5796 Directions

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House Detectives, Inc.

Kalispell, MT

Certified mitigation

Get a quote (406) 756-3636 Directions

Claim, correct or remove

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What do you need?Not sure? Start with a test. Most homes only need a fix if the result is 4 pCi/L or higher.ZIP codeYour namePhoneContractors usually call to schedule.Email (optional)Anything else they should know? (optional)For example: closing date, basement type, or your result.FoundationYour radon result (if you have one)Situation

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Radon guides

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Common questions

Who installs radon systems near Flathead County, MT?

The certified mitigation contractors listed above serve Flathead County, MT and the surrounding county. Get two or three quotes.

How much does radon mitigation cost near Flathead County, MT?

Typical residential systems cost in the high hundreds to low thousands of dollars depending on the foundation and how the pipe is routed. See our mitigation cost guide.