2026-05-04 · 5 min read
Radon Mitigation Cost in Minnesota (2026)
Minnesota averages 5.5 pCi/L and has one of the most aggressive state radon programs in the US. Here's what mitigation costs in the Twin Cities and greater Minnesota.
Minnesota Radon at a Glance
Minnesota averages 5.5 pCi/L indoor radon — well above the EPA action level. The Minnesota Department of Health (MDH) estimates two out of five Minnesota homes test above 4 pCi/L. South-central Minnesota over glaciated till is the highest-risk area.
Minnesota has one of the most proactive state radon programs in the country. The state requires contractor certification, runs public education campaigns, and has pushed radon testing into real estate transactions more aggressively than most states.
What Mitigation Costs in Minnesota
Slab or Basement: $900–$2,000
Minnesota's Twin Cities metro has a mature, competitive mitigation market:
- Standard slab, single zone: $900–$1,400
- Finished basement, Twin Cities: $1,100–$1,800
- Greater Minnesota (rural): $900–$1,600
- Multiple foundation zones: $1,500–$2,200
Crawl Space: $2,500–$6,000
Many older Minnesota homes have partial crawl spaces, particularly in outstate communities:
- Basic crawl space: $2,500–$3,500
- With vapor barrier: $3,000–$5,000
- Difficult access or high radon: $4,000–$6,000
Winter Scheduling
Minnesota contractors are busy. In summer, scheduling can stretch to 3–4 weeks. In winter, availability opens up — and winter is actually a good time to install (frozen ground limits sub-slab pressure variation).
Minnesota Licensing
Minnesota requires certification through MDH-approved programs. This creates higher baseline quality — uncertified contractors can't legally operate. Verify any contractor at health.state.mn.us/radon or radonproficiency.org.
Radon and Real Estate in Minnesota
Minnesota has pushed radon strongly into the real estate market. The MN Association of Realtors includes radon in standard purchase agreements, and radon testing is nearly universal in metro-area transactions. If you're buying in Hennepin, Ramsey, or Dakota County — expect a radon contingency.
Minnesota Resources
- MN Department of Health Radon Program: health.state.mn.us/radon or 651-201-4601
- Free test kit programs: check MDH website seasonally
- Verify certification: radonproficiency.org or nrsb.org
Frequently Asked Questions
How much does radon mitigation cost in Minnesota?
Minnesota homeowners typically pay $900–$2,000 for a standard slab or basement installation. The Twin Cities metro is competitive and well-priced. Crawl spaces run $2,500–$6,000.
Which Minnesota counties have the highest radon?
The highest-testing counties include Blue Earth, Nicollet, Rice, Steele, and Dodge in south-central Minnesota. The Twin Cities metro (Hennepin, Ramsey, Dakota, Washington counties) also tests well above the action level.
Does Minnesota require a licensed radon contractor?
Minnesota requires radon mitigators to be certified by the Minnesota Department of Health (MDH). The state maintains an approved list of certified contractors. Both NRPP and NRSB certifications are accepted.
Does Minnesota offer free radon testing?
The Minnesota Department of Health runs periodic free or discounted test kit programs, particularly during Radon Awareness Month (January). Check health.state.mn.us/radon for current offers. Some county health departments also provide free kits.
Find a Certified Mitigator Near You
Every contractor on RadonBase is NRPP or NRSB certified — mitigators only, no testers.
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