Radon Mitigation Systems in Minnesota

Radon mitigation is the fix for a high radon test in a Minnesota home. The Minnesota Department of Health reports that 2 in 5 homes tested statewide have radon levels that pose a significant health risk, so mitigation is routine work here, not an exotic repair. We connect you with an independent, MDH-licensed mitigation contractor who designs the system for your foundation, puts the price in writing for free, and verifies the result with a follow-up test.

How Active Sub-Slab Depressurization Works

Radon enters from the soil through cracks in the slab, floor-to-wall joints, sump baskets, and other openings, a pathway the Minnesota Department of Health describes on its radon program pages. An active sub-slab depressurization system reverses the pressure difference that pushes the gas indoors. Four parts do the work:

Suction point

A hole cored through the basement slab into the soil or aggregate beneath it. Homes with large footprints, additions, or finished basements sometimes need more than one.

Sealed pipe run

Schedule 40 PVC pipe carries soil gas from the suction point up through the house or along an exterior wall, ending above the roofline where the gas disperses.

Inline radon fan

A continuously running fan mounted in the attic, garage attic, or outside. It keeps the soil under the slab at lower pressure than the house so radon flows out instead of in.

Manometer and MDH system tag

A U-shaped gauge on the pipe shows the system is pulling. Systems installed under the Minnesota licensing law also carry a visible MDH system tag identifying the installer.

What a Minnesota Installation Includes

A written, itemized quote before any work, based on your foundation type and layout
Sealing of accessible entry routes such as sump lids and major slab cracks as part of the job
A fan sized for your soil conditions, with the manometer that proves the system is pulling
The MDH system tag required for installations performed under the Minnesota licensing law
A follow-up radon test that verifies your new level

Homes built in Minnesota after June 1, 2009 already contain a passive radon pipe under the state building code, Minnesota Rules 1303.2400. If a passive home still tests high, the usual fix is smaller: a licensed contractor adds a fan to the existing pipe. Our new construction radon page covers that scenario.

What It Costs

The Minnesota Department of Health reports that mitigation systems generally cost $1,500 to $3,000 installed in Minnesota, and the EPA reports a national average near $1,200 with a typical range of about $500 to $2,500. Foundation type, home size, and routing decide where your home lands. The Minnesota cost guide breaks down every factor, and the written quote you receive is the real number for your house.

Mitigation work looks a little different across the state: Rochester contractors deal with karst-driven levels in southeast Minnesota, while Duluth installers work around near-surface bedrock. See how it plays out locally on our Rochester and Duluth pages.

Verify Your Contractor's Minnesota Radon License

Before you hire anyone for radon work in Minnesota, check their license. The Minnesota Radon Licensing Act, Minnesota Statutes section 144.4961, requires anyone who performs radon testing, mitigation, or laboratory analysis for compensation to be licensed by the Minnesota Department of Health, and every mitigation system installed under the law must carry an MDH system tag. A licensed professional expects the question. Three things to ask before you sign:

Can I see your current MDH radon license, and is the company licensed too?

Will the installed system carry the MDH system tag required under the licensing law?

Will I get a written, itemized estimate and a follow-up radon test that confirms the system works?

Radon Mitigation Questions

What kind of radon mitigation system do Minnesota homes usually need?

Most Minnesota homes have basements, so the standard fix is active sub-slab depressurization: a suction point through the slab, a sealed pipe run, and a continuously running fan that vents soil gas above the roofline. Homes with crawl spaces get a sealed membrane over the exposed soil with the pipe drawing from beneath it.

How much does a radon mitigation system cost in Minnesota?

The Minnesota Department of Health reports that installation generally runs between $1,500 and $3,000 in Minnesota, and the EPA reports a national average near $1,200. Your foundation type, home size, and pipe routing decide where a specific home lands, which is why the contractor you are matched with provides a free written quote first.

Does a radon mitigation system really work?

Yes, when designed and verified properly. The EPA states that some radon reduction systems can cut indoor radon by up to 99 percent. The proof is the follow-up test: after installation, a new radon measurement confirms the system brought your level down.

Who is allowed to install radon mitigation systems in Minnesota?

Under Minnesota Statutes section 144.4961, anyone who performs radon mitigation for compensation must hold a license from the Minnesota Department of Health, and installed systems must carry an MDH system tag. Verify any installer in the MDH license lookup before signing.