Radon Mitigation in
Plymouth, Minnesota
NRPP-certified, EPA-trained radon mitigation serving Plymouth and Hennepin County. Family-owned since 2014. Free estimates. 5-year written warranty.
Radon Risk in Plymouth & Hennepin County
Minnesota consistently ranks among the highest-radon states in the country. The Minnesota Department of Health estimates that approximately 2 in 5 Minnesota homes have radon levels above the EPA action level of 4 pCi/L — and Hennepin County is no exception.
Radon is a naturally occurring radioactive gas that seeps into homes from the soil and bedrock beneath your foundation. It's colorless, odorless, and tasteless — impossible to detect without testing. Long-term exposure is the second leading cause of lung cancer in the United States, responsible for about 21,000 deaths per year.
If you haven't tested your Plymouth home, or if results came back above 4 pCi/L, the EPA recommends mitigation. Radon Stoppers can typically reduce levels below 2 pCi/L — often down to 1 pCi/L or less.
Radon Mitigation Services in Plymouth
Sub-Slab Depressurization
Most common and effective method. A pipe draws radon from beneath your foundation before it enters your home.
Crawlspace Encapsulation
Heavy-duty vapor barrier plus active depressurization to control radon entry through exposed soil.
Real Estate Services
Fast turnaround for buyers and sellers. Mitigation installed and verified before closing.
System Repairs & Fan Replacement
Existing system not performing? We diagnose and repair or upgrade any brand of mitigation system.
Not sure which service you need? See our full services page or call 763-222-9562.
Certified, Experienced, Local
Serving Plymouth and Surrounding Communities
Based in Monticello, we serve Plymouth and the surrounding Hennepin County area — typically reaching your home within the same week you call.
We also serve nearby communities including:
Don't see your city? View our full service area or call to confirm coverage.
Our Process
1. Free Estimate
We assess your home, review any test results, and provide a transparent written quote — no pressure.
2. Custom Installation
We design and install the right system for your home's foundation type. Most installs complete in one day.
3. Post-Install Testing
We re-test after installation to confirm your radon levels are well below 4 pCi/L.
4. 5-Year Warranty
Your system is backed by a written 5-year warranty. We stand behind our work.
Plymouth, MN: Established Suburbs, Aging Foundations, Radon Risk
Plymouth is one of Hennepin County's largest communities, with a housing stock that spans from 1970s split-levels to newer executive builds along Medicine Lake and Parkers Lake. Homes built in the 1970s and 1980s -- which make up a significant portion of Plymouth's residential inventory -- were constructed before radon awareness was widespread, often without any radon-resistant features. Foundation aging, hairline cracks, and deteriorating floor-wall joints are all pathways radon uses to enter.
Minnesota's radon geology doesn't stop at city limits. Hennepin County, which includes Plymouth, sees the same elevated risk as the rest of the upper Midwest. The EPA action level is 4 pCi/L; the Minnesota Department of Health estimates about 2 in 5 Minnesota homes test at or above that threshold. Left unaddressed, long-term radon exposure is the second leading cause of lung cancer in the United States.
Radon Stoppers, LLC is NRPP-certified and MDH-licensed to perform radon mitigation throughout Plymouth and western Hennepin County. We complete most residential installations in a single day and back every job with a 5-year written warranty. Call 763-222-9562 for a free estimate.
Radon Mitigation FAQs for Plymouth
Are older homes in Plymouth at higher radon risk?
Homes built before the mid-1990s typically lack radon-resistant features. Plymouth has a substantial number of homes from the 1970s and 1980s that were never designed with radon mitigation in mind. That doesn't mean newer homes are safe -- any home can have elevated radon depending on foundation type and soil conditions. Testing is the only way to confirm. Radon Stoppers serves Plymouth and all of western Hennepin County.
What is the typical radon mitigation process for a Plymouth home?
We start with a free in-home assessment to evaluate your foundation type -- poured concrete, block, slab-on-grade, or crawlspace. We then design a sub-slab or sub-membrane depressurization system, install it in a single visit (typically 3-5 hours), and verify performance with post-install testing. All Plymouth installations include a 5-year written warranty.
Is radon testing required when selling a home in Plymouth?
Minnesota does not legally require radon testing for home sales, but buyers routinely request it and real estate professionals commonly include it in inspection contingencies. If elevated radon is discovered during inspection, Radon Stoppers offers fast-turnaround mitigation to keep closings on track. We work directly with sellers, buyers, and agents across Plymouth and Hennepin County.
Ready to make your homesafe from Radon?
Call us for a free, no-obligation assessment and quote specific to your property.