Your basement is pulling air out of the ground.
About one in four Michigan homes tests above the federal radon action level. We measure what is coming in, build a system that stops it, and then measure again to prove it worked.
The EPA asks homeowners to act at 4.0 picocuries per litre. We design and size every system to land below 2.0, and we confirm it with a post-installation test rather than asking you to take our word for it.
Two services, one visit
Most homeowners call us because a test came back high, or because a buyer's inspection flagged radon on a closing clock. We handle both ends.
Radon testing
Continuous radon monitors placed in the lowest livable level, with a dated report you can hand to an agent or a lender. Results in days, not weeks.
Radon mitigation
An active sub-slab depressurization system designed around your foundation — diagnostics first, then the suction points and fan your house actually needs, then a retest.
How a radon system actually works
Five stages, from the gas under your slab to the discharge above your roof. Step through it, or let it run.
Radon is not evenly spread across Metro Detroit
Michigan's Department of Environment, Great Lakes, and Energy publishes the share of tests that came back at or above the action level, county by county. It varies enormously across a single metro area.
| County | Relative share | Elevated results |
|---|---|---|
| Livingston | 40% | |
| Washtenaw | 38% | |
| Oakland | 29% | |
| Wayne | 17% | |
| Macomb | 11% |
Read the full Michigan county breakdown · See the towns we cover
What happens after you call
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We test, or we read the test you already have
If a buyer's inspector already ran one, we work from that report. If not, we place a continuous monitor and give you a number.
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Diagnostics before design
We drill a small test hole and measure how far suction actually reaches under your slab. That is what determines how many suction points the house needs — and skipping it is why undersized systems fail their retest.
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Permit, then install
We pull the permit as a licensed Michigan builder and install in a day for most single-family homes. Fan goes outside the living space; the sump lid and slab penetrations get sealed.
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Retest and documentation
We re-measure after the system has run long enough to stabilize, and you get a dated report showing the before and after. That report is what a buyer, lender, or appraiser wants to see.
Why homeowners pick us
- We are a licensed Michigan builder. Michigan does not license radon contractors at all. It does require a licensed builder or trade contractor to pull a permit — and many radon installers cannot.
- NRPP certification you can look up. Our certification number is NRPP #000000, verifiable in the national directory before we set foot in your house.
- We design below the action level, not to it. Landing at 3.9 pCi/L is technically a pass and practically a near miss. We size for under 2.0.
- We also know what the water did. Radon and moisture enter through the same slab cracks, sump pit, and wall joints. We read both while we are down there, and we tell you what we see.
- Written warranty. 5-year system warranty on parts and labour, transferable to the next owner.
Questions we get asked first
Does Michigan require radon contractors to be licensed?
No. Michigan does not license or regulate radon testing or mitigation. The credential to check is national certification through the NRPP or NRSB — and separately, whether the contractor holds a Michigan builder or trade licence, because that is what a permit requires. More on Michigan's rules.
How much does a system cost?
It depends on your foundation, how permeable the soil under the slab is, and how many suction points the diagnostics call for. Clay under a Metro Detroit slab often needs more than one. We quote on site after measuring, not over the phone.
We are closing in two weeks. Can you work that fast?
Usually. Most single-family installs are a one-day job, and the retest runs afterward. Call early in the contingency period rather than at the end of it.
Will the fan run all the time, and what does that cost?
Yes — an active system runs continuously, which is how it keeps the sub-slab at lower pressure than your basement. It draws roughly as much electricity as a single light bulb left on.
My neighbour tested low. Do I still need to test?
Yes. Radon depends on the soil directly beneath your foundation and on how your particular house is built. Two houses on the same street routinely test very differently.