If you just got a radon test back above 4 pCi/L, the first question is never "how does this work" -- it's "what is this going to cost me." Here's a straight answer on installed price, monthly electricity cost, and how to vet whoever you hire, using figures the EPA and the Minnesota Department of Health actually publish.
How much does radon mitigation cost in Minnesota?
Most radon mitigation systems installed in Minnesota homes run $800 to $2,500, with a national average near $1,200, per the EPA's A Citizen's Guide to Radon. The final number depends on your foundation type, how many suction points the house needs, and whether an existing sump pit can be reused as the suction point.
A few things move that price up or down in practice:
- Foundation type: A simple poured slab in a Rochester or Mankato rambler is usually the cheapest install. Homes with a basement plus a crawlspace addition -- common across Eden Prairie, Woodbury, and Maple Grove -- often need a second suction point and cost more.
- Sump pit reuse: If your home already has a sealed sump basket, the licensed operator can often route the suction pipe through it instead of coring a new hole in the slab, which saves labor.
- Pipe routing and roofline: Multi-story homes in Northeast or Southside Minneapolis, where the exhaust pipe has to clear two stories to exit above the roofline, take more PVC and more labor time than a rambler.
- Permit fees: Many Minnesota municipalities require a permit for radon mitigation work, and the fee varies by city -- check with your local building department before assuming it's baked into a quote.
What is the monthly cost of running a radon mitigation system?
A radon fan runs continuously, 24 hours a day, and most inline radon fans draw between 40 and 100 watts. At typical Minnesota residential electric rates, that works out to roughly $3 to $10 per month in added electricity cost, depending on the fan model and your utility's rate.
That's a small ongoing cost for continuous protection, but it's also a diagnostic tool: if your electric bill jumps far more than that, or the fan starts making a new noise, it's worth having the licensed operator who installed it check the fan and the U-tube manometer gauge that indicates whether the system is still pulling negative pressure under the slab.
How do I find the best radon mitigation company near me in Minnesota?
The best radon mitigation company for your home is one licensed through the Minnesota Department of Health's radon program, willing to show you the post-mitigation test result, and willing to explain the manometer reading in writing. Price matters less than licensing status and a documented follow-up test.
Concretely, ask any installer -- whether you're in Duluth, St. Cloud, Burnsville, or Bloomington -- these questions before you sign anything:
- Are you licensed by the Minnesota Department of Health to perform radon mitigation, and can I see the license number?
- Will you perform or arrange a post-mitigation radon test, and how long after installation will it run?
- What's the warranty on the system, and does it cover the fan motor specifically?
- Where will the exhaust pipe exit relative to windows and roof eaves? Minnesota building code and most municipal permits govern minimum clearance from openings.
This network connects homeowners across the Twin Cities metro and Greater Minnesota with the licensed operators who actually perform the testing and installation -- the goal here is to get you to a vetted installer, not to send out a crew ourselves.
What is an active sub-slab depressurization system?
An active sub-slab depressurization (ASD) system is a PVC pipe run from beneath the concrete slab, through the house, and out above the roofline, with an inline fan that continuously pulls soil gas -- including radon -- out from under the foundation and vents it outdoors before it can seep indoors. It's the most common radon fix in Minnesota basements.
The fan runs around the clock, and a small U-tube manometer mounted on the pipe shows at a glance whether the system is still creating negative pressure under the slab. If you want the full mechanics of how the suction point, piping, and fan work together, see the companion guide on how radon mitigation works in Minnesota.
At what level is radon dangerous?
The EPA sets 4 picocuries per liter (pCi/L) as its radon action level -- the point at which it recommends fixing your home. There's no scientifically established safe level of radon exposure, so the agency also suggests considering mitigation for results between 2 and 4 pCi/L.
Minnesota's geology -- glacial till and fractured bedrock across much of Hennepin County, Dakota County, Olmsted County, and Stearns County -- lets soil gas move more freely into homes than in many other states, which is part of why the Minnesota Department of Health encourages every home in the state to be tested regardless of age or construction type. Short-term test kits give the most reliable worst-case reading during the colder months, when windows and doors stay closed and the stack effect pulls more soil gas upward into the living space.
This article is for general homeowner education and is not a substitute for a radon test performed in your home or advice from a Minnesota-licensed radon professional. Permit requirements, fees, and code details vary by municipality -- confirm specifics with your local building department before starting work.