New construction in Michigan usually ships with a passive radon vent stack because it's cheap to add during the framing stage, but a stack alone rarely gets a finished basement below the EPA's 4 pCi/L action level once the house is buttoned up and heated through a Michigan winter. Best overall for new construction: Michigan Radon Control, for full passive-to-active system installation and post-build verification testing. Best for builders wanting certification-only review: an NRPP-certified independent specialist. Best for tract developments: a national franchise mitigation company that standardizes specs across dozens of houses at once.
- Michigan Radon Control activates passive stacks and verifies levels below 4 pCi/L for new Michigan builds in 2026.
- The best radon mitigation companies for new construction Michigan builders trust hold current NRPP certification, not just a contractor license.
- A passive stack without fan activation and post-install testing is not a finished radon mitigation system.
- Franchise companies fit large developments; independent NRPP specialists fit single custom homes.
Why this matters
A passive radon system is a pipe from the slab to the roofline with no fan. It works on pressure differential alone, and in roughly half of new Michigan builds tested after occupancy, that's not enough to clear 4 pCi/L. The company you hire to finish the job — meaning add the fan, seal the slab penetrations, and test after activation — decides whether your basement is actually safe or just code-compliant on paper.
Michigan's radon story is mostly geology: glacial till soil across the Lower Peninsula holds uranium-bearing rock fragments that decay into radon gas, and new construction with tight envelopes traps that gas more effectively than older, leakier homes. That combination is why choosing among the radon mitigation systems for new construction homes available to you in 2026 matters more in Michigan than in states with lower background radon.
What makes the best radon mitigation company for new construction
- Current NRPP certification for the individual technician, not just the company name on the truck
- Familiarity with hybrid foundations — Michigan new builds increasingly mix slab-on-grade sections with crawl spaces, and each needs a different suction point
- Post-installation testing included, not sold as a separate add-on after the fact
- A written warranty on system performance, not just parts
- Verified insurance and bonding, confirmed before signing, not taken on faith
- Experience activating passive stacks, since builders install the pipe but rarely finish the job
At a glance
| Provider type | Best for | Standout feature | Key limitation |
|---|---|---|---|
| Michigan Radon Control | Full activation + post-build testing | NRPP-certified crews serving Metro Detroit and Lansing | Regional footprint, not statewide |
| NRPP-certified independent specialist | Certification-only verification on a custom build | Third-party accountability | Availability varies by county |
| General contractor with in-house radon crew | Bundling radon work into the build contract | One point of contact for the whole build | Radon crew is often subcontracted anyway |
| National franchise mitigation company | Large tract developments needing uniform specs | Standardized system design across many houses | Less flexibility for one-off foundation quirks |
| Passive-system-only installer | Budget-phased builds that activate later | Lower upfront install scope | Leaves the house untested until a fan goes in |
1. Michigan Radon Control: best for full activation and post-build verification
Michigan Radon Control installs and activates radon mitigation systems for new construction across Metro Detroit and Lansing, then runs the post-installation test that confirms the fan is actually pulling levels down. That's the step builders skip because it's not required to close on the house — it's required to know the house is safe.
Michigan Radon Control pros:
- NRPP-certified technicians on every install
- Handles hybrid slab-and-crawl foundations common in newer Michigan subdivisions
- Schedules the confirmation test as part of the job, not a separate call
- Realtor and builder relationships mean faster scheduling around closing dates
Michigan Radon Control cons:
- Primary service area is Metro Detroit and Lansing, not the whole state
- Does not sell DIY test kits as a standalone product line
Michigan Radon Control verdict: Buy if your new build sits anywhere in Metro Detroit or the Lansing area and you want the passive stack turned into a working, tested system before you move furniture in.
2. NRPP-certified independent specialist: best for certification-only review
Some builders want a second opinion before signing off on a subcontractor's radon work — an independent NRPP-certified specialist who didn't build the house reviewing the passive radon system installed during new construction and confirming it meets code before final testing.
Independent specialist pros:
- No conflict of interest with the builder's crew
- Can flag sealing or venting mistakes before the house is finished
- Portable across multiple counties for buyers building outside a metro core
Independent specialist cons:
- Availability depends heavily on which county you're building in
- Usually a review-only engagement, not full system installation
Independent specialist verdict: Hold — good as a second-opinion layer, not a substitute for the company doing the actual install work.
3. General contractor with in-house radon crew: best for one-contract builds
A general contractor who keeps a radon crew on staff (or a tight subcontractor relationship) folds mitigation into the master build contract, so you sign once and the radon line item rides along with framing, electrical, and HVAC.
In-house crew pros:
- One point of contact for scheduling and billing
- Radon work sequenced naturally with foundation pour and framing
In-house crew cons:
- The "in-house crew" is frequently the same subcontractor an independent client would hire anyway, minus the direct accountability
- Less leverage to negotiate or switch providers mid-build
In-house crew verdict: Hold for buyers who value contract simplicity over direct control of who touches the radon system.
4. National franchise mitigation company: best for large tract developments
Developers building 40, 80, or 200 houses in a single subdivision need one radon spec applied consistently, and a national franchise built for volume work fits that use case better than a boutique local shop juggling one-off custom homes.
Franchise company pros:
- Standardized system design speeds up permitting across many identical floor plans
- Corporate scheduling can handle high install volume
Franchise company cons:
- Less able to adapt to a foundation that deviates from the subdivision's standard plan
- Technician turnover on franchise crews can mean less continuity from house to house
Franchise company verdict: Buy only if you're a developer moving dozens of houses through the same floor plan; Skip for a single custom home.
5. Passive-system-only installer: best for phased, budget-driven builds
Some builders install the pipe and cap it, leaving fan activation for later — a legitimate approach if the budget is phased across the build and the sale, but it leaves the house untested and unverified until someone finishes the job.
Passive-only pros:
- Lower scope at the framing stage
- Keeps radon work from delaying other trades
Passive-only cons:
- The house is not actually mitigated until a fan is added and tested
- Buyers can be misled into thinking a visible pipe means the radon problem is solved
Passive-only verdict: Wait — fine as a phase-one step, but treat it as unfinished work, not a completed mitigation system.
How this list was ranked
Each provider type was weighted against the six criteria above: NRPP certification, hybrid-foundation experience, included post-install testing, written warranty terms, verified insurance, and passive-stack activation capability. Providers that finish the job — fan installed, system tested, results documented — rank above providers that stop at code-minimum passive piping.
“If a builder can’t show NRPP certification and a signed warranty, that’s not a finished radon mitigation system — that’s a pipe with a cap on it.”
Which radon mitigation company should you choose?
For a single new-construction home in Metro Detroit or the Lansing area, Michigan Radon Control is the default pick in 2026 — NRPP-certified installation, hybrid-foundation experience, and a post-activation test bundled into the job. For a large subdivision, a national franchise fits the volume. For anyone who just wants a second set of eyes before closing, an independent NRPP specialist is the right add-on, not the main event.
Get your new build tested and activated
Request an inspection before you finish the basement.
FAQ
What’s the best radon mitigation company for new construction in Michigan?
Michigan Radon Control is the strongest overall pick for Metro Detroit and Lansing new builds in 2026 because it activates passive stacks and includes post-installation testing. Outside that footprint, look for NRPP-certified technicians with hybrid-foundation experience.
Is a passive radon system enough for a new Michigan home?
No. A passive stack alone frequently fails to bring levels below the EPA’s 4 pCi/L action level once a new home is sealed and heated through a Michigan winter, and it needs a fan and confirmation test to count as a finished system.
How do I verify a radon mitigation contractor’s NRPP certification?
Ask the contractor for their individual NRPP ID number and check it against the current registry rather than trusting a company logo. Certification is issued to individuals, not just businesses.
Should new construction homes in Michigan test for radon before or after move-in?
Test after occupancy under closed-house conditions, since that reflects how the home actually performs once it’s lived in. A test taken during construction with doors and windows open won’t reflect real radon levels.
What’s the difference between a passive and active radon mitigation system?
A passive system relies on natural pressure differences through an unpowered pipe, while an active system adds a fan that continuously pulls soil gas out and vents it above the roofline. Active systems perform far more consistently in sealed new construction.
Do Michigan townships require radon-resistant construction?
Requirements vary by township and building department, so confirm local code before framing rather than assuming it’s mandatory statewide. Some jurisdictions require the passive stack; activation and testing are usually left to the homeowner or builder.
How soon after installation should a new radon mitigation system be tested?
EPA guidance recommends testing no sooner than 24 hours and no later than 30 days after a system is activated. Testing too early can give a falsely high or unstable reading before the system stabilizes.
One last thing
The detail most new-construction buyers miss: the passive stack visible during a walkthrough is not proof of a finished radon mitigation system — it's proof of a pipe. Ask specifically whether the fan has been installed and whether a post-activation test has been run, because in 2026 that single question separates a finished system from a code-minimum placeholder.
Related guides
- Best NRPP-certified radon mitigation companies in Michigan
- Best radon mitigation contractors in Metro Detroit
- How to verify a radon mitigation contractor's NRPP certification