Radon Mitigation Cost in Minneapolis–St. Paul
Two local government sources publish price ranges for the Twin Cities. Here's what they say, what changes the price for your house, and how to spot a bad quote.
Short answer
$1,500 – $3,000
That's the general range from the Minnesota Department of Health. Hennepin County puts the average near $1,800. MDH warns homeowners to avoid quotes under $1,000.123
Price ranges at a glance
| What | Price |
|---|---|
| Radon mitigation system in Minnesota, general range (MDH)1 | $1,500–$3,000 |
| Average cost, per Hennepin County2 | About $1,800 |
| Full range Hennepin County gives2 | $500–$2,500 |
| Quotes MDH says to avoid3 | Under $1,000 |
| MDH inspection of a system installed after June 20201 | Free |
These are published ranges, not quotes. The two sources overlap but don't match exactly. MDH's statewide range runs higher than Hennepin County's, so plan around $1,500–$3,000 and expect your bids to land inside it.
What the price covers
A Minnesota system has a suction pit under the slab, a PVC pipe that ends above the roof edge, a fan in an unconditioned space, a U-tube manometer, an alarm that sounds if the fan fails, a labeled system tag, and sealing of basement cracks and openings. Most installs also need electrical work under a permit.1 The mitigation guide explains each part.
What pushes your price up or down
MDH says cost depends on many factors, including the type of system and how your home was built.1 Hennepin County adds the strength of the radon source.2 In practice, a pro looks at:
Foundation and system type
Sub-slab suction, drain tile suction and crawl-space sub-membrane systems take different materials and labor.1
Inside or outside pipe
Routing through the house or up the exterior changes the work, and both must meet MDH's height and distance rules.1
Diagnostics
Some pros test first to choose the suction point and the pipe and fan sizes. Ask whether that's included.3
Electrical and permits
Ask whether the licensed electrical work and permit are in the price, and who pulls permits.3
An existing passive pipe
Homes built since 2009 should already have a radon vent pipe without a fan, which may change the scope.2
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A lot of Twin Cities radon work happens around a sale. Under the Minnesota Radon Awareness Act (Minn. Stat. § 144.496), in effect since January 1, 2014, the seller must tell the buyer in writing, before the purchase agreement is signed:45
- whether radon tests have been done,
- the most current radon records and reports,
- any radon levels, mitigation or remediation,
- details of any mitigation system, and
- a radon warning statement.
The seller must also hand over MDH's Radon in Real Estate Transactions publication. The law requires disclosure, not testing.6 In a sale, MDH says the decision to mitigate should rest on a continuous monitor test or the average of two short-term tests run side by side.7 If a mitigation cost is part of your negotiation, an on-site bid from a licensed pro gives both sides a real number to work from.
How to judge a quote
MDH's hiring advice, in plain terms:3
- The installer visits before quoting. MDH says bids shouldn't be made over the phone or by email.
- The price is firm, with no hidden fees for future work.
- You don't pay in full until the work is done and a valid test shows reduced levels.
Red flags
- No individual MDH license number.
- A price under $1,000. MDH says these often mean substandard work and a system that may not work.
- A quote without a site visit.
Questions MDH suggests asking
- Is there a contract, and is the price firm?
- What warranty covers materials, workmanship and system performance, and for how long?
- Will you guarantee levels below 4.0 pCi/L, and what happens if they aren't?
- Will you train me on how the system works and how to troubleshoot it?
Help paying for it
MDH says financial assistance may be available depending on household income, location and funding.1 Ask MDH's Indoor Air Unit what applies where you live.
Common questions
How much does radon mitigation cost in Minneapolis–St. Paul?
MDH says costs generally range from $1,500 to $3,000. Hennepin County puts the average around $1,800, with a range of $500 to $2,500 depending on construction and the strength of the radon source.
Is a radon quote under $1,000 a red flag in Minnesota?
MDH tells homeowners to avoid inexpensive mitigation rates under $1,000, because very low prices often mean substandard workmanship and a system that may not work.
Can I get a firm price over the phone?
MDH advises against it. Bids should come after a site visit, not by phone or email.
When should I pay for the system?
MDH says not to pay in full until the work is complete and a valid radon test shows reduced levels.
Does a Minnesota seller have to pay for radon mitigation?
No law requires it. The Minnesota Radon Awareness Act requires the seller to disclose known radon information and give the buyer MDH's publication. Who pays for mitigation is negotiated between buyer and seller.
Is there financial help for radon mitigation in Minnesota?
MDH says assistance may be available depending on household income, location and funding. Contact MDH's Indoor Air Unit to ask.
General information summarized from the public sources listed below. It isn't professional, medical or legal advice. A licensed professional who inspects your home can tell you what it needs.
Sources
- MDH, "Radon Mitigation Systems"
- Hennepin County, "Radon testing"
- MDH, "Find a Radon Mitigation Professional"
- Minnesota Statutes § 144.496 (Minnesota Radon Awareness Act)
- MDH, "Radon in Real Estate Transactions" (PDF)
- MDH, "Radon in Real Estate"
- MDH, "A brief guide on how to keep your home safe from radon" (PDF)