Most Minnesota homes land between $1,500 and $3,000 installed, permit and confirmation test included. This page explains exactly what puts a house at each end of that range so you can read a quote instead of guessing at it.
A residential radon mitigation system in Minnesota costs $1,500 to $3,000 installed. A simple house — one poured basement slab, clean gravel underneath, an existing sump to tie into, and a clear interior path to the attic — typically comes in between $1,500 and $1,900. A complicated house — hollow block walls, two or three suction points, an addition on its own slab, or a crawl space that needs sheeting — runs $2,400 to $3,000 and occasionally past it.
That is the whole answer, and you should be able to get it from anyone you call. "It depends" is not a quote. It does depend, but the things it depends on are knowable, countable, and listed below. By the end of this page you should be able to walk your own basement, look at four or five specific things, and put your house in the right half of the range before an installer ever knocks on the door.
One framing point before the numbers: this is not a recurring expense. A mitigation system is a one-time capital project, like a water heater or a sump pump, that permanently changes how your foundation behaves. There is no subscription, no monitoring contract, and no annual service fee. After the install you are looking at a few dollars a month in electricity and a retest every couple of years.
The fastest way to a real number: a walkthrough. Foundation type, sump, and additions account for most of the spread in this range, and all three take about ten minutes to assess in person. Call (218) 520-9679 or request a free written estimate.
Every line in the table below is a real variable an installer is pricing when they walk your basement. Nothing here is a markup or a judgment call — each one is either labor hours or materials.
| Cost driver | Pushes price down | Pushes price up | Rough impact |
|---|---|---|---|
| Foundation type | Single poured slab basement | Hollow block walls, stone foundation, multiple slabs | $200–$600 |
| Suction points | One point serves the whole slab | Two or three points for poor sub-slab communication | $400–$800 per added point |
| Drain tile & sump | Interior drain tile loop with a sump to tie into | No drain tile — core the slab and hand-excavate a pit | $150–$400 |
| Pipe routing | Interior chase through a closet or mechanical room | Exterior run up the side of the house, sealed and painted | $200–$500 |
| Sub-slab material | Clean washed gravel — air moves freely | Compacted clay, native till, or construction fill | Often forces a second point |
| Crawl space | None | Sub-membrane sheeting over exposed soil, sealed at every seam | $500–$1,200 |
| Fan sizing | Standard residential inline fan | High-suction fan for tight soils or long runs | $100–$250 |
| Electrical permit | Included in the quote | Should never be excluded | Typically under $150 |
| House height | One-story or split with a short run to the roof | Three-story hillside home, long pipe run above the eave | $150–$400 |
The single most expensive variable is the suction point count, and it is the one homeowners cannot see. If the slab was poured over clean gravel, one point pulls a vacuum across the entire floor. If it was poured over compacted clay or fill — common in older Duluth construction and on hillside lots where the pad was cut and backfilled — suction dies out a few feet from the pit and the far corners of the basement never see any pressure reversal. A diagnostic communication test settles it before design, which is why a careful installer sometimes gives you a range on the phone and a fixed number after the visit. The mechanics of all this are covered in depth on our radon mitigation system installation page.
The reason two Duluth quotes can differ by $900 on the same house is often not the pipe. It is what one of them left out. A complete written quote covers all of this:
A quote at $900 is not a bargain version of the above. It is usually the same pipe with the permit, the sealing, the sump lid, and the confirmation test removed. Those omissions do not show up on installation day. They show up two years later when you retest and the number has not moved, or at closing when a buyer's agent asks for the post-mitigation report and there is not one.
1. A 1994 poured-slab basement in Piedmont Heights — roughly $1,500 to $1,900. Single rectangular slab poured over clean gravel, interior drain tile running to a sump in the corner, a mechanical room with a straight shot up to the attic. The installer ties into the drain tile instead of coring the slab, caps the sump with a gasketed lid, runs pipe up the interior chase, sets the fan in the attic, and is out in four hours. Nothing about this house fights the system, so it sits at the bottom of the range.
2. A 1920s hillside home in Central Hillside with hollow block walls — roughly $2,200 to $2,800. The slab was poured over whatever was on site, there is no drain tile, and the block foundation walls are hollow — the voids act as a chimney collecting soil gas along the entire footing and releasing it into the basement well above the floor. That means coring the slab, hand-excavating a pit, likely a second suction point after a communication test comes back weak, and possibly treating the block cores directly. There is no interior chase, so the pipe runs up the exterior and gets painted to match the siding, and on a tall lot that is a long run. Four separate drivers stack, and the price stacks with them.
3. A basement plus a crawl space under a rear addition, Lakeside — roughly $2,600 to $3,200. The original basement is straightforward, but the addition sits on exposed dirt with no airflow connection to the main slab. Two disconnected foundation areas means two suction points, and the crawl needs heavy sheeting laid over the soil, sealed at every seam and up the walls, before its suction point goes in. That sheeting is labor, often in a space you cannot stand up in. Whether one fan serves both points or the design needs two depends on the pressures. Our crawl space radon mitigation page explains the sub-membrane approach and why it costs what it does.
Testing and mitigation are two different purchases, and you should not pay for a system before you have a number. Details on timing and closed-house conditions are on our Duluth radon testing page.
| Test type | Duration | Typical cost | Best for |
|---|---|---|---|
| Short-term DIY kit | 2–7 days | $15–$40 including lab fee | A first look at whether you have a problem |
| Long-term DIY kit | 90 days to 1 year | $25–$60 | The most accurate picture of real annual exposure |
| Professional continuous monitor | 48 hours | $125–$250 | Real estate transactions and pre-mitigation design |
| Post-mitigation confirmation test | 48 hours, 24+ hours after startup | Should be included in the install | Proving the system worked |
This is the part that surprises people in a good way. Ongoing cost is close to nothing.
Electricity. The fan runs continuously, twenty-four hours a day, year round — and draws roughly the power of a standard light bulb. That works out to a few dollars a month. Because a properly sealed system pulls soil gas from beneath the slab rather than conditioned air out of the living space, it should not meaningfully change your heating load either. If a system noticeably raises your heating bill, that is a sealing problem, not a design feature.
Fan replacement. Radon fans run for years of continuous operation, but they are mechanical and they do eventually fail. When one does, you replace the fan, not the system — the pipe, suction point, sealing, and routing all stay. It is a fraction of the original cost and a short visit. A failed fan announces itself as sudden silence, a new grinding noise, or a manometer whose two liquid columns have returned to level.
Retesting. Retest every two years, and also after major foundation or slab work, a sump replacement, or anything that tightens the building envelope such as new windows, siding, or an HVAC change. A DIY kit is fine for this. A running fan proves the fan is running; only a measurement proves the level is low.
Two honest reasons to weigh, neither of which requires alarm.
The first is health. Radon is the leading cause of lung cancer among people who have never smoked and the second leading cause overall. The risk is cumulative over decades of exposure, not acute — nobody needs to leave the house tonight. But Minnesota's average indoor level is about 4 pCi/L, three times the national average, and two in five Minnesota homes tested come back at levels the Department of Health considers a major health risk. If your house is one of them, every year you wait is a year of exposure you are choosing to keep.
The second is transactional, and it is the one that tends to move people. The Minnesota Radon Awareness Act requires sellers to disclose, in writing before a purchase agreement is signed, whether the home has been tested, any results and reports in their possession, any mitigation work done, a Radon Warning Statement, and a copy of the MDH publication Radon in Real Estate Transactions. Testing is not mandatory in a sale, but in practice buyers ask. A high reading discovered mid-inspection is a price negotiation happening on someone else's timeline, with a buyer who has just been handed a reason to renegotiate and an inspection contingency clock running. A $2,000 system installed on your schedule is a smaller number than the same system credited at the closing table under pressure — and a documented, confirmed system is a genuine selling point.
Licensing is not optional in Minnesota. Anyone performing radon testing or mitigation in a building they do not own or lease must hold a license from the Minnesota Department of Health. National industry certification alone is not sufficient. Ask for the license number in writing before work begins — from any contractor, including us.
For a house testing at or above 4 pCi/L, yes. A one-time cost of $1,500 to $3,000 permanently removes an exposure that is the leading cause of lung cancer in nonsmokers, and it does so with a system that has essentially no ongoing cost beyond a few dollars a month in electricity. There is also a resale argument: under the Minnesota Radon Awareness Act you must disclose test results and mitigation work to a buyer, and a documented, confirmed system is far easier to hand over than an untreated high reading discovered during an inspection.
Generally no. Homeowners policies cover sudden, accidental damage — fire, hail, a burst pipe. Radon is a naturally occurring condition of the soil your house sits on, not a covered peril, so mitigation is almost always an out-of-pocket cost. It is worth checking your specific policy and asking your agent, but do not build a plan around coverage. The more useful angle is timing: if you are buying, radon mitigation is a normal item to negotiate into the purchase agreement, and buyers routinely ask sellers to pay for or credit the system.
You may legally work on a building you own, so a DIY install is not prohibited in Minnesota the way hiring an unlicensed contractor is. Whether it is a good idea is a different question. The parts that decide whether a system works are the parts that are hard to do without training: reading sub-slab communication to place the suction point, sizing the fan to the soil, sealing so the fan pulls soil gas instead of basement air, and terminating the discharge at least 10 feet above grade and 10 feet from any opening. The fan circuit needs an electrical permit either way. A DIY system that does not lower the number is money spent twice.
It rarely appears as a line-item bump in an appraisal, but it protects value in the transaction, which matters more in practice. Minnesota sellers must disclose radon testing and mitigation history before a purchase agreement is signed. Handing a buyer a documented system with a post-mitigation test result showing a low number removes an objection entirely. Handing them a 9 pCi/L reading mid-inspection invites a renegotiation you do not control, and buyers commonly ask for more than the system actually costs. The system does not raise the ceiling so much as it keeps the floor from dropping.
Usually because they are not the same job. Check whether the cheap quote includes the electrical permit, the sealing work at the floor-wall joint and slab cracks, an airtight sump lid, a U-tube manometer, a permanent system label, and a post-installation confirmation test. Check whether it names a suction point count or just quotes a flat rate sight-unseen. Also confirm the MDH license number on both. A genuinely lower price usually means a genuinely simpler house — existing drain tile, clean gravel, a short interior pipe run — not a better deal.
A few dollars a month. The fan runs continuously and draws roughly the power of a standard light bulb, so the electricity cost is small and predictable. It also should not meaningfully increase your heating bill: a properly sealed system pulls soil gas from beneath the slab rather than conditioned air out of the living space. If your heating costs jumped noticeably after an install, that is a symptom of poor sealing at the suction point or sump, and it is worth having the installer come back and look at it.
Far less than a new system. Radon fans run continuously for years and eventually wear out, but when one fails you replace only the fan — the pipe, suction point, sealing, sump lid, and routing all stay in place. It is a short visit and a fraction of the original install cost. Watch the U-tube manometer: if the two liquid columns return to level, the fan has stopped pulling or the pipe is blocked, and the house is unprotected until it is fixed. Sudden silence or a new grinding noise is the other common warning.
We will look at your foundation, tell you which drivers on this page apply to it, and put an itemized price in writing — permit and confirmation test included. No obligation.