Radon Mitigation Cost in Winona, MN: 2026 Guide
The Minnesota Department of Health puts a standard sub-slab system at $1,500 to $3,000 installed. This guide covers what moves your house up or down inside that range, and the questions that get you a firm number instead of a guess.
What the money buys
| Job type | Typical range | Notes |
|---|---|---|
| Standard basement, one suction point | $1,500 - $2,200 | Most Winona homes land here |
| Activating a passive stack (post-2009 home) | Under $1,000 in many cases | Fan, wiring, and gauge on existing piping |
| Crawl space membrane system | $2,000 - $3,000+ | Vapor barrier size drives it |
| Large slab, additions, or two suction points | $2,200 - $3,000+ | More coring, more pipe run |
| Electrical work if no outlet near the fan | +$350 - $450 | Licensed electrician plus permit |
Statewide numbers back this up. Minnesota installers commonly quote in the $1,200 to $1,600 band for a simple job, with a complex foundation pushing past $2,500. Pricing out in the river valley can differ from Twin Cities pricing. Get a quote for your house, not a metro average.
The five things that set your price
- Foundation type. Basement, crawl space, slab on grade, or a combination. A combination costs more because each zone needs its own treatment.
- Home age and sealing work. An older Winona home usually needs more crack and sump sealing than a recent build.
- Where the fan can go. An attic or garage route takes more pipe and labor than a straight exterior run.
- Sub-slab material. Tight clay under the slab needs a stronger fan or a second suction point. Loose fill pulls easily.
- Electrical. An outlet near the fan location saves money.
How to avoid overpaying
Ask every bidder the same four questions. Is the price firm or an estimate? Does it include the post-mitigation test? Will the system carry the MDH tag that Minnesota has required since 2019, with the installer's license number on it? What happens if the follow-up test still reads 4.0 or higher? A professional bidder answers all four without hedging.
Mitigation is a one-time cost. Radon exposure carries a lung cancer risk. If you ever sell, Minnesota's disclosure law means a known high result stays with the house until someone pays to fix it. Sellers often find that the fix costs less than the price concession a buyer demands for the same problem.