Radon mitigation cost in Minnesota

What moves the price in Minnesota

Twin Cities metro pricing clusters in the $2,100–$2,700 band. Part of what you're paying for is compliance: Minnesota requires a state radon system tag on every professionally installed system ($75 per tag), and only licensed professionals may do the work. Deep frost lines and finished basements — common across Minnesota — can add labor.

Price sources: MN Dept. of Health — mitigation systems; HomeGuide radon mitigation cost (2026). See our methodology on cost sourcing.

The law: what to demand from a Minnesota quote

Minnesota has one of the strictest radon regimes in the country. Under the Minnesota Radon Licensing Act (Minn. Stat. 144.4961), anyone performing radon mitigation must hold an active license from the Minnesota Department of Health (MDH) — a mitigation professional license runs $250/year and includes a measurement license. There's more: every professionally installed mitigation system in Minnesota must carry a state-issued radon system tag ($75 each), which ties the system to a licensed installer and makes unlicensed work easy to spot. For you, that's a built-in verification tool. Ask for the installer's MDH license and confirm the system will be tagged. An untagged system installed by an unlicensed person isn't just lower quality — it's non-compliant with state law.

Source: MN Dept. of Health — Radon Licensing.

Radon across Minnesota’s metros

The Twin Cities metro carries most of Minnesota's population and a lot of its radon. Hennepin County (Minneapolis) tests high in about 40% of homes; Dakota County runs near 39%, and Ramsey (St. Paul) a bit lower around 31%. Head south to Olmsted County (Rochester) and it jumps to 56%. Across greater Minnesota the numbers climb further — the worst rural counties top 80%. Even the 'low' metro numbers here would be alarming in most states, which is the point: in Minnesota, testing isn't a formality, it's expected.

Why radon is high in Minnesota

Minnesota's radon problem is a product of its glacial geology: the state sits on thick glacial till and sediments rich in uranium-bearing granite ground down and redeposited by ice-age glaciers. That, combined with a climate that keeps homes sealed tight for much of the year, gives Minnesota one of the highest radon rates of any populous state — the Minnesota Department of Health estimates roughly 40% of homes have levels above the action level, and in some counties it's far higher. The cold-climate 'stack effect,' where warm indoor air rising in winter pulls soil gas up through the foundation, makes the problem worse precisely when windows stay shut.

Is it worth the cost?

In a state where roughly 40% of homes test high, mitigation is closer to routine home maintenance than a rare fix. Weighed against the health stakes — radon is the leading cause of lung cancer among non-smokers and, by EPA's estimate, responsible for about 21,000 lung-cancer deaths a year nationally — a one-time $2,400 system is modest insurance. Minnesota's active real-estate market treats radon as a standard inspection item, and a tagged, guaranteed system removes it as a negotiating point at sale. The state's high baseline actually strengthens the resale case: buyers here expect to ask about radon.

Health figures: U.S. EPA, Health Risk of Radon.

What the price actually buys

The typical Minnesota price buys an active sub-slab depressurization (ASD) system: a radon fan mounted in the attic or on an exterior wall pulls air continuously from beneath the basement slab through PVC pipe and vents it above the roofline. A single suction point serves most homes; larger or drain-tile-connected foundations may need the system tied into existing tile. The price includes the state radon system tag, a manometer to show the fan is working, sealing of slab penetrations and the sump, and a post-install re-test guaranteeing the level drops below 4 pCi/L. The fan draws about as much power as a lightbulb and runs continuously; plan on replacing it every 5–10 years.

Foundations & what they cost to fix

Minnesota homes are overwhelmingly built with full basements — a response to the deep frost line, which requires footings well below grade anyway. That's favorable for mitigation cost, since a poured basement slab is the cheapest foundation to depressurize. The complications are finished basements (a very common Minnesota feature that can require careful routing to keep the system unobtrusive) and drain-tile systems, which many Minnesota homes have and which a good installer will tie the suction into rather than fight.

Test before you pay for mitigation

Before you spend a dollar on a system, confirm you actually have a problem — and get a real number, not a guess. A short-term charcoal test kit (a few days in the lowest lived-in level of the home, then mailed to a lab) is the cheapest way to establish your level; a continuous monitor is handy for tracking trends but isn’t a certified measurement. In Minnesota, MDH Radon Program is the place to start for low-cost or free kits and guidance. If your result comes back at or above 4 pCi/L, then the cost figures on this page are what to expect. If it’s borderline, re-test before committing — radon fluctuates, and one high reading in a storm week isn’t the same as a sustained problem. You can also check how your county tests up to gauge how likely a high reading is where you live.

Red flags in a Minnesota quote

• ⚑No MDH license offered or verifiable — mitigation without a license is illegal in Minnesota.
• ⚑No mention of a state radon system tag — every compliant MN system must have one.
• ⚑No post-install re-test included — you'd have no proof the system actually worked.
• ⚑A fan installed in the basement or a living space instead of the attic/exterior — against standards and code.
• ⚑A quote far below the $2,100–$2,700 MN norm with no explanation — likely skipping the tag, permit, re-test, or guarantee.