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Complete Wisconsin Pricing Guide · Updated 2026

Wisconsin Radon Mitigation Cost in 2026

Real Wisconsin pricing: $1,000–$2,500 typical install. Milwaukee and Madison cluster at $1,500–$2,000. Smaller markets often $800–$1,500. System-by-system breakdown, real-estate-transaction pricing, and what to watch for in a state with no contractor licensing of its own.

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Wisconsin radon mitigation cost by system type

Five system types cover essentially every Wisconsin residential and small-commercial scenario. Pricing tracks foundation type, home size, and installation complexity.

Wisconsin Radon Mitigation Cost by System Type (2026)
System TypeCost RangeMedian CostLifespanBest For
Active Sub-Slab Depressurization (ASD)$1,000 – $2,300$1,50020+ yr piping / 7–10 yr fanMost Wisconsin basements (~80% of installs)
Sub-Membrane Depressurization$1,500 – $3,500$2,40015–20 yrCrawl space homes (Driftless farmhouses, Door County lake homes)
Block-Wall Depressurization$2,000 – $4,000$2,80015–20 yrPre-1970 Milwaukee, Madison, Waukesha homes
Drain-Tile Depressurization$1,500 – $3,500$2,20015–20 yrHomes with existing perimeter drain tile
Passive-to-Active Retrofit$500 – $1,500$90020+ yrNewer subdivision homes with passive stub-out
All costs include post-mitigation verification testing per AARST-ANSI standards. Wisconsin has no state contractor license — verify NRPP (nrpp.info) or NRSB (nrsb.org) credentials directly.

Wisconsin radon mitigation cost by city (2026)

Pricing variation across Wisconsin cities reflects local labor costs, partner contractor density, and county-average radon levels. All cities served by the Wisconsin Radon Experts partner network.

Wisconsin City-by-City Radon Mitigation Cost Estimates (2026)
Wisconsin CityCounty Avg pCi/LTypical Mitigation CostAvg Closing Window
Milwaukee4.5–6.0$1,500 – $2,0001–3 weeks
Madison (Dane County)5.5–7.5$1,500 – $2,0001–3 weeks
Waukesha6.0–8.0$1,500 – $2,2001–3 weeks
Wausau (Marathon County)12.0–25.0$1,200 – $1,8002–4 weeks
Green Bay4.5–6.5$1,200 – $1,8002–4 weeks
Appleton5.0–7.0$1,200 – $1,9002–4 weeks
Eau Claire5.5–7.5$900 – $1,7002–4 weeks
La Crosse (Driftless)8.0–14.0$1,000 – $1,8002–4 weeks
Janesville (Rock County)7.0–10.0$1,200 – $2,0002–4 weeks
Kenosha4.0–6.0$1,300 – $1,9002–4 weeks
Racine4.0–6.0$1,300 – $1,9002–4 weeks
Oshkosh4.5–6.5$1,100 – $1,8002–4 weeks
Sheboygan4.5–6.5$1,000 – $1,7002–4 weeks
West Allis4.5–6.0$1,400 – $1,9001–3 weeks
Costs include post-mitigation verification testing. Closing-timeline expedites add 10–20%. County averages drawn from WI DHS and partner-network pre-mitigation testing. Data current as of 2026-Q2.

Why Wisconsin mitigation costs what it does

Wisconsin radon mitigation pricing reflects a stack of structural factors:

  • Materials: Schedule 40 (or schedule 80 for exterior chases) PVC piping, continuous-duty radon fan, manometer, urethane and butyl sealants, and electrical components total $250–$500 per typical install.
  • Labor: 4–8 hours of NRPP/NRSB-certified installer time at $75–$150 per hour, depending on metro — Milwaukee and Madison rates run higher than rural markets.
  • Equipment: Diamond core drill, vacuum testing rig, PVC tooling, and sealing supplies amortized across each installer's annual job count.
  • Insurance: Wisconsin contractors carrying $1M+ general liability coverage pass that overhead through into pricing.
  • Certification maintenance: NRPP recertification, NRSB renewal, AARST membership dues, and continuing-education hours all carry annual cost.
  • Vehicle and dispatch overhead: Service truck, fuel — Wisconsin distances are non-trivial — and scheduling infrastructure.
  • Verification testing: 48–96 hour CRM-based post-mitigation test using a calibrated continuous radon monitor.

The structural cost floor means any Wisconsin quote under $700 in a real Milwaukee, Madison, or Waukesha market is a signal to ask harder questions: undersized fan, no verification test, no sealing of slab cracks, or — most often — an uncertified operator. Because Wisconsin maintains no state contractor license, an uncredentialed installer can underprice the legitimate market and disappear before the warranty period starts. Verify NRPP at nrpp.info and NRSB at nrsb.org before signing.

The American Lung Association's 2024 Healthcare Provider Decision Support Tool quotes a national typical radon mitigation cost of $1,500-$2,000 when recommending mitigation for any home testing at or above the EPA action level of 4.0 pCi/L. Wisconsin partner-contractor pricing of $1,000-$2,500 (Milwaukee/Madison cluster $1,500-$2,000) sits within the ALA-cited range for active sub-slab depressurization on standard basement foundations.

Ongoing cost · monthly operating expense

How Much Does a Radon Mitigation System Cost Per Month to Run in Wisconsin?

An active radon mitigation system in Wisconsin costs $11–$15 per month to operate. The breakdown: $7–$9/month in fan electricity (a typical 65-watt continuous-duty radon fan uses about 47 kWh/month, billed at Wisconsin\'s 2025 average residential rate of $0.165/kWh per EIA); $3–$5/month in amortized fan replacement (radon fans last 5–8 years and cost $250–$400 to replace); and ~$1/month in amortized biennial re-testing ($15–$30 short-term test kit every 2 years as EPA recommends). The monthly operating cost is minor compared to the $800–$2,500 one-time install.

Wisconsin Radon Mitigation Monthly Operating Cost Breakdown (2026)
Cost ComponentMonthly CostCalculation
Fan electricity$7 – $965W continuous × ~47 kWh/mo × $0.165/kWh (Wisconsin avg residential rate, EIA 2025)
Fan replacement (amortized)$3 – $5$250–$400 fan ÷ 60–96 months (5–8 yr typical lifespan)
Biennial re-testing (amortized)~$1$15–$30 short-term test kit every 2 years (EPA-recommended cadence)
Optional CRM monitor$0Continuous radon monitor is $150–$500 one-time if you want real-time visibility
TOTAL all-in monthly$11 – $15Typical Wisconsin home with active sub-slab depressurization
TOTAL annual$132 – $180First 5-7 years; year of fan replacement: add $350–$600 one-time
Costs assume a 65W RadonAway-class continuous-duty fan (industry standard for active sub-slab depressurization). Higher-flow systems (Festa AMG, Fantech) draw 80-120W which adds $2-$4/mo. Wisconsin electricity rates vary by utility (We Energies, Alliant Wisconsin, Xcel Energy, Wisconsin Public Service); rates above are the 2025 EIA state average. Actual costs are confirmed during your post-mitigation site inspection by your certified Wisconsin partner contractor.

The bigger picture: $11–$15/month ≈ $132–$180 per year in ongoing radon protection. Compared to EPA\'s estimate of ~21,000 annual US lung cancer deaths attributable to radon — and lifetime lung cancer treatment costs of $75,000–$300,000+ per case — the operating cost of a mitigation system is among the highest-ROI ongoing safety expenses a Wisconsin homeowner can carry, especially given Wisconsin's elevated-homes hotspots in Marathon, Waukesha, and Dane counties (5-8 pCi/L common in elevated WI homes).

These are planning estimates derived from public-data inputs. Final monthly operating cost is confirmed during your post-mitigation site inspection by your NRPP/NRSB-certified Wisconsin partner contractor. Wisconsin Radon Experts is a lead-routing service — we do not perform mitigation work ourselves.

FAQ

Wisconsin Radon Mitigation Cost FAQs

Frequently Asked Questions

How much does radon mitigation cost in Wisconsin in 2026?
Most Wisconsin residential radon mitigation systems install for $1,000–$2,500, with the typical job landing somewhere around $1,500–$1,800. Milwaukee and Madison metros cluster between $1,500 and $2,000 for standard active sub-slab depressurization. La Crosse, Eau Claire, Wausau, Sheboygan, and other smaller markets often price between $800 and $1,500. Crawl space sub-membrane systems on older Driftless-region farmhouses run $1,500–$3,500. Block-wall depressurization on pre-1970 Milwaukee or Madison stock runs $2,000–$4,000.
What drives Wisconsin radon mitigation pricing?
Six factors shape the quote. (1) Foundation type — poured-concrete basements are the cheapest, hollow-block walls and crawl spaces cost more because of additional sealing and depressurization complexity. (2) Home and basement size — larger footprints occasionally need a second suction point ($300–$500 extra). (3) Riser routing — interior chases through finished space cost more than exterior runs or unfinished basement routes; Wisconsin winters push installers toward schedule 80 PVC and stainless fasteners on exterior chases, which adds material cost. (4) Fan specification — higher-CFM fans for larger or multi-zone homes add $100–$300 over a standard GP301. (5) Sealing scope — sump pit covers, control joints, and visible cracks all need urethane sealing. (6) Verification testing — should be included; if billed separately, expect $100–$250.
Does homeowners insurance cover radon mitigation in Wisconsin?
Generally no. Standard Wisconsin homeowners policies treat radon as a pre-existing condition rather than sudden damage, so mitigation falls outside covered losses. A few specialty policies, certain HSA plans, and IRS medical-expense provisions may apply when a household member has a documented respiratory condition and mitigation is prescribed by a physician — but those are exceptions, not the rule. Confirm with your specific carrier before assuming coverage.
Who pays for radon mitigation in a Wisconsin home sale?
Wisconsin real estate disclosure law (Wis. Stat. § 709.03 and the Real Estate Condition Report, Form WB-3) requires sellers to disclose known prior radon test results within 10 days of accepting an offer, but it does not mandate testing, mitigation, or which party pays. In practice, when a test comes back elevated mid-transaction, the cost is negotiated between buyer and seller. Sellers absorb the cost in many Milwaukee, Madison, and Waukesha-area deals; cost-sharing and buyer credits at closing are also common. Pre-listing testing — increasingly recommended by Wisconsin Realtors — lets sellers mitigate proactively and avoid mid-transaction friction.
Are there hidden costs in Wisconsin radon mitigation quotes?
Watch for six line items. (1) Post-mitigation verification testing — should be included; if quoted separately, $100–$250. (2) Permits — Wisconsin has no state mitigation permit, but a handful of municipalities require an electrical or plumbing permit for the fan circuit; that pushes $50–$150 onto the quote. (3) Dedicated electrical circuit — some installs need a new 110V run for the fan, $100–$300. (4) Cosmetic restoration — drywall patching, paint touch-up, or finished-basement cleanup, $150–$500. (5) Long exterior chases on multi-story homes — extra material and ladder work. (6) Sealing scope beyond the standard slab penetrations. Reputable Wisconsin partners itemize every line.
How do I get the best price on Wisconsin radon mitigation?
Five tactics. (1) For non-emergency installs, get two or three quotes from NRPP- or NRSB-certified Wisconsin contractors — competition keeps pricing honest. (2) Schedule between May and August if you can; winter is peak radon awareness season in Wisconsin and lead times stretch. (3) Avoid emergency real-estate-timeline expedites when possible — closing-week rushes add 10–20%. (4) Confirm the quote includes the 48–96 hour post-mitigation verification test. (5) Ask about bundling pre-mitigation testing with the install if you have not yet tested. Wisconsin Radon Experts partners provide itemized quotes by default.
Can Wisconsin radon mitigation be financed?
Yes. Most NRPP- or NRSB-certified Wisconsin mitigation contractors offer financing through Synchrony, GreenSky, or similar contractor-finance platforms — typically $0 down, 0–12 month interest-free promotional options, or 24–60 month installment plans. Focus on Energy and Wisconsin Home Energy Plus may apply in narrow weatherization-bundled scenarios. PACE financing for residential radon is uncommon in Wisconsin. Always compare total cost-with-interest against paying cash.
What does FHA financing mean for Wisconsin radon mitigation cost?
FHA loans do not legally require radon testing or mitigation as of 2026, but HUD Handbook 4000.1 strongly encourages it. Some FHA underwriters in EPA Radon Zone 1 or Zone 2 counties (and every Wisconsin county is one or the other) request a radon test result during underwriting, and Wisconsin FHA appraisers occasionally flag elevated readings as a property-condition issue that must be addressed before closing. When FHA-required mitigation comes into play, the cost matches the standard Wisconsin range — $1,000–$2,500 — and the seller most commonly absorbs the cost, though that point is negotiable.
What's the long-term cost of leaving elevated radon alone?
EPA attributes roughly 21,000 lung cancer deaths each year in the United States to radon — second only to smoking. Wisconsin's elevated-homes rate (roughly 1 in 10 statewide, much higher in hotspot counties like Marathon and Waukesha) means a Wisconsin household exposed at the 5–8 pCi/L levels common in elevated WI homes for 20 years faces measurably elevated lung cancer risk. American Cancer Society lifetime medical-cost estimates for lung cancer treatment range $75,000–$300,000+ per case. A one-time $1,000–$2,500 mitigation cost compares favorably to that downside on any cost-benefit basis.
How does Wisconsin radon mitigation cost compare to neighboring states?
Wisconsin sits in the middle of the national pricing range. High-cost states like California, Massachusetts, and Connecticut routinely quote $1,500–$4,000+. Lower-cost states like Tennessee, Kentucky, and Missouri price $600–$1,800. Wisconsin and its neighbors — Iowa, Minnesota, Illinois — all cluster in the $1,000–$2,500 zone for standard ASD. One Wisconsin-specific cost driver: the absence of state contractor licensing means homeowners need to factor in the time cost of verifying NRPP/NRSB credentials directly at nrpp.info or nrsb.org, since there is no state directory to fall back on.
How much does a radon mitigation system cost per month to run in Wisconsin?
In Wisconsin, an active radon mitigation system costs about $11-$15 per month to operate. Breakdown: $7-$9 in fan electricity (a typical 65-watt continuous-duty radon fan runs 24/7 and uses about 47 kWh/month at Wisconsin's 2025 average residential electricity rate of $0.165/kWh per EIA); $3-$5 in amortized fan replacement (radon fans last 5-8 years and cost $250-$400 to replace); and approximately $1 in amortized biennial re-testing ($15-$30 short-term test kit every 2 years as EPA recommends). The monthly operating cost is minor compared to the $800-$2,500 one-time install — and an order of magnitude below the lifetime health cost of unmitigated elevated radon.
What are the ongoing maintenance costs of a radon mitigation system in Wisconsin?
Three components for a Wisconsin active radon mitigation system: (1) Electricity for the continuous-duty radon fan, roughly $132-$180/year at Wisconsin residential electricity rates. (2) Fan replacement every 5-8 years ($250-$400 in parts plus $100-$200 in labor if a pro reinstalls). (3) Biennial re-testing per EPA recommendation ($15-$30 DIY short-term kit or $100+ for a professional test). Optional: a continuous radon monitor (CRM) for real-time visibility runs $150-$500 one-time. Annual ongoing cost: typically $132-$180 for the first 5-7 years, then a one-time bump of $350-$600 in the year you replace the fan.

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