Certified radon companies in Minnesota

Minnesota pairs high radon with a written disclosure duty, and a seller has to hand over the state health department booklet as well.

Radon in Minnesota

Minnesota sits in the northern band where radon is common, and the state runs its own testing program rather than leaning on federal county averages alone.

Before a residential sale closes, the seller must give the buyer a written radon disclosure covering whether the home has been tested, what any results were, and whether a mitigation system was installed, along with the Minnesota Department of Health radon booklet.

What a home sale in Minnesota requires

The duty is Minnesota Statutes section 144.496, and a seller who stays quiet about radon facts they knew is liable to the buyer, who has two years from closing to bring an action. What it does not do is require a test. An untested house discloses nothing useful, which is why the test is normally the buyer's move inside the inspection period.

Certified for mitigation, 26 companies

Certified to install a radon reduction system in a home. Most of these also test.

Measurement only, 27 companies

Certified to measure radon but not to install the fix. Many are home inspectors who test as part of an inspection, which is how radon first comes up in most sales.

How this list is put together

Taken from the public directories of NRPP and NRSB, read 2026-09-01. Certified individuals are grouped into the company they list, and each company is tagged with what its people are certified for. Phone numbers and websites appear only where a registry publishes them; we do not fill the gaps from third-party data, because name matching gets it wrong often enough to put one firm's number on another firm's listing.

Listing is free and alphabetical. Nobody pays for position. Certifications expire and registries lag, so check a company's current standing before you hire. If something here is wrong, tell us and it gets fixed.

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