Radon Mitigation Cost Calculator
Estimate what a radon mitigation system costs for your home: pick the system type, foundation size, fan and local cost level, and get an itemized low / typical / high install range, annual operating cost, and a 10-year ownership total. Figures track published 2026 US industry ranges.
Estimate your installation cost
All pricing runs 100% in your browser. Defaults reflect the most common job: one suction point per 1,200 sq ft of foundation.
Itemized installation breakdown (typical)
| Line item | Low | Typical | High |
|---|
This is a cost-planning estimate, not health advice. Follow EPA guidance and consult a licensed mitigator.
Radon mitigation systems compared by cost
Installed ranges are US national figures from published 2026 industry cost guides (see sources). Annual electricity uses $0.17 per kWh.
| System | Typical installed range | Annual electricity |
|---|---|---|
| Active sub-slab depressurization | $800–$2,500 | $104.24/yr |
| Drain-tile suction | $800–$1,500 | $104.24/yr |
| Sealed sump-pit suction | $900–$2,000 | $104.24/yr |
| Sub-membrane depressurization (crawlspace) | $1,200–$3,500 | $163.81/yr |
| Add a fan to an existing passive stack | $500–$1,000 | $104.24/yr |
| Fan replacement on an existing system | $300–$600 | $104.24/yr |
Annual electricity shown for the default fan of each system: standard fan ~70 W for most, high-suction ~110 W for crawlspace systems.
Cost factors that move the quote
| Factor | Added cost | Notes |
|---|---|---|
| Each additional suction point | $300-$600 | One point covers roughly 1,200 sq ft of slab |
| Crawlspace vapor-barrier membrane | $1.50-$3.00 / sq ft | Crawlspace (sub-membrane) systems only |
| Low crawlspace clearance (under ~24 in) | $200–$500 | Added to the install range when it applies |
| Vent pipe routed through finished interior | $250–$600 | Added to the install range when it applies |
| New electrical run over ~50 ft | $150–$350 | Added to the install range when it applies |
| Multiple separate slab sections | $300–$600 | Added to the install range when it applies |
| Regional labor multiplier | 0.90x–1.30x | Lower-cost areas to very high-cost areas |
Ongoing maintenance & replacement costs
| Item | Cost | When |
|---|---|---|
| Fan electricity | $104–$164/yr | Ongoing, while the fan runs (rate: $0.17/kWh) |
| Fan replacement (installed) | $300–$600 | Every ~7–10 years of continuous service |
| Retest kit (DIY) / professional retest | $15–$50 / $100–$300 | Post-install and at a 2-year budgeting interval |
| Manometer / u-tube check | $0 | Visual: confirm the gauge still shows suction |
What a radon mitigation system costs in 2026
A 2026 national cost guide puts a professionally installed radon mitigation system at $800-$2,800 for a typical home, with a standard active sub-slab job landing around $1,200-$1,500 in most markets. That range is wide because almost every part of the job is site-dependent: the foundation type decides which system is even possible, and routing, electrical work, and regional labor rates decide where inside the band your quote lands.
Most of the price is skilled labor. Across the base installation, roughly 50% goes to labor (drilling the slab or sealing the crawlspace, running and sealing the vent pipe), about 24% to PVC pipe, fittings and sealant, about 18% to the fan hardware itself, and about 8% to the electrical hookup. The estimator above breaks the base quote into exactly these line items so you can see which part of a quote is negotiable and which is not: the fan has a published retail price band ($150-$300 for a standard unit), while labor is what varies by region.
Foundation type is the single biggest cost driver. A straightforward basement with one concrete slab needs a single suction point and an exterior vent run, which is why sub-slab systems are cheapest. Drain-tile and sump-pit suction reuse an existing drainage path, usually landing in the same $800-$1,500 band. Crawlspace homes need a sealed vapor barrier over bare soil before depressurization can work, and that membrane plus sealing labor is what pushes those jobs to $1,200-$3,500 or more.
The recurring cost is small but real. A standard fan draws about 70 watts continuously, around $104 per year at $0.17 per kWh, and the fan itself is a wear part with a ~7-10 year service life, so a 10-year ownership plan should budget one $300-$600 replacement. That is why the estimator shows a 10-year total, not just the install price: a $1,430 installation costs about $2,872 over ten years once electricity and one fan replacement are included.
Two worked examples, step by step
- Typical sub-slab job — $1,430 typical. 1,200 sq ft basement, active sub-slab depressurization, standard 70 W fan, national-average labor, DIY test kit, post-install retest included in the quote. Base install mid $1,400 + fan standard (no upgrade delta) + 0 extra suction points + 0 complexity + DIY test kit $30 + retest $0 =
$1,430. Low end: $800 base + $15 kit = $815, rounded to$820. High end: $2,500 + $50 kit =$2,550. Recommended suction points: ceil(1,200 / 1,200) =1. Annual electricity: 70 W x 8.76 x $0.17 =$104.24/yr. 10-year total: $1,430 + 10 x $104.24 + $400 (one fan replacement) =$2,872.40. - Complex crawlspace job — $7,330 typical. 2,000 sq ft crawlspace, sub-membrane depressurization, high-suction 110 W fan, national-average labor, low clearance (+$300), long electrical run (+$250), one extra suction point (+$450), professional pre-install test (+$200), DIY retest kit (+$30). Base $2,000 + high-suction upgrade delta $100 + extra suction point $450 + membrane 2,000 sq ft x $2.00 = $4,000 + complexity $550 + test $200 + retest $30 =
$7,330. Low end rounds to$5,050, high end to$11,420. Annual electricity for the 110 W fan:$163.81/yr. 10-year total: $7,330 + $1,638.10 + $400 =$9,368.10.
Practical tips for a fair price
- Get 2-3 itemized quotes. Ask each bidder to split labor, pipe/fittings, fan model and price, electrical, and any extras. Quotes that differ by more than a few hundred dollars almost always differ in one line item, not in the base price.
- Check what the fan line item buys. A standard fan costs $150-$300 at retail; if the quote lists a high-suction unit, ask why, because it also costs ~$60 more per year to run.
- For crawlspace quotes, separate the membrane price. At $1.50-$3.00 per sq ft it is the largest variable; a 2,000 sq ft quote should show roughly $3,000-$6,000 of membrane work as its own line.
- Confirm the post-install retest and permit. Most installers include the retest; if yours does not, budget $15-$50 for a DIY kit or $100-$300 for a professional retest.
- Ask about the fan warranty and replacement price now. You will buy another fan in 7-10 years; knowing the model and its installed price ($300-$600) turns a surprise into a line item.
- Count suction points, not square feet alone. One suction point covers roughly 1,200 sq ft of slab. A 2,400 sq ft footprint that is quoted with one point deserves a second bid.
Radon mitigation cost FAQ
How much does a radon mitigation system cost in 2026?
A professionally installed radon mitigation system in the US typically costs $800-$2,800, according to a 2026 national cost guide from Peerless Environmental. A standard active sub-slab system for a typical basement lands around $1,200-$1,500. Crawlspace systems run $1,200-$3,500 because of the vapor-barrier membrane and extra sealing labor. The estimator above builds a low/typical/high range for your exact inputs and applies a regional labor multiplier.
What does an active sub-slab depressurization system cost?
Active sub-slab depressurization is the most common design: a pipe drilled through the slab with a fan that vents soil gas above the roofline. Installed cost runs $800-$2,800 nationally, and one 2025 industry cost guide puts the average around $1,550. A worked example from this page: a 1,200 sq ft basement with a standard fan in an average-cost area and a DIY test kit totals $820-$2,550, with $1,430 typical. Roughly 50% of the base is labor, 24% pipe/fittings/sealant, 18% fan hardware, and 8% electrical hookup.
How much does a radon fan cost to buy or replace?
Standard radon fan hardware costs $150-$300 retail; high-suction models run $250-$400 and low-noise/energy-saving models $200-$350. Replacing a failed fan on an existing system, with no new piping, typically costs $300-$600 installed. The calculator shows the fan hardware as a separate line item so you can see exactly what that piece of the quote buys.
How much does radon testing cost before and after installation?
Short-term DIY test kits cost $15-$50 each; professional testing services run $100-$300. After installation, most contractors include a post-install test in the quoted price. Budgeted separately, a DIY retest kit is $15-$50 and a professional post-install retest is $100-$300. The estimator includes testing as a pure cost line item with no interpretation of the results.
Why do crawlspace radon systems cost more?
Sub-membrane (crawlspace) systems need a sealed vapor barrier laid over the soil, priced at about $1.50-$3.00 per sq ft installed, plus sealing labor around every pier and penetration. On a 2,000 sq ft crawlspace that membrane work alone adds roughly $3,000-$6,000 to the base system cost. Worked example: a 2,000 sq ft crawlspace with low clearance and a long electrical run totals $5,050-$11,420, with $7,330 typical, including membrane and extras.
What makes one radon mitigation quote higher than another?
Foundation type is the biggest driver, followed by the number of suction points at $300-$600 each, membrane area for crawlspaces, pipe routing through finished interior ($250-$600 extra), low-clearance crawlspace work ($200-$500), new electrical runs over ~50 ft ($150-$350), and regional labor rates (the estimator applies a 0.90x-1.30x multiplier). Quotes that differ by more than a few hundred dollars usually differ in one of these line items, which is why itemization matters.
How much electricity does a radon fan use per year?
A standard ~70 W radon fan running continuously uses about 613 kWh per year, which is roughly $104 per year at $0.17 per kWh. A high-suction ~110 W fan uses about 963 kWh per year, roughly $164 per year. The Health Canada reduction guide cites roughly $50-$75 per year for fan electricity on typical Canadian systems. The estimator shows annual electricity plus a $400 fan replacement amortized over ~9 years, about $44 per year, for a true yearly ownership cost.
How long do radon mitigation fans last?
Industry guidance commonly cites 7-10 years of continuous operation for a radon fan; some last longer, some fail sooner in hot or dusty installations. Plan for one installed replacement at $300-$600 during a 10-year ownership window. The 10-year cost projection on this page adds that replacement to the install price plus 10 years of electricity.
Can I add a fan to an existing passive radon pipe instead of a full system?
If the home already has a properly built passive radon vent stack, adding an inline fan is the cheapest path at $500-$1,000 installed. It only applies when the passive pipe exists and is correctly routed; otherwise a full sub-slab or sub-membrane system is needed. The estimator has a dedicated system type for this option.
Does homeowners insurance cover radon mitigation?
Standard homeowners policies generally do not cover radon mitigation as a routine installation, so plan to budget for it directly. That is the position reported by a 2026 national cost guide; check your own policy for any exceptions, riders, or state-specific provisions before assuming otherwise.
Is a radon mitigation system worth it when selling a home?
A documented, working system with a post-install test removes radon as an open negotiation question during a sale. One real-estate cost guide notes sub-slab systems run $1,200-$2,500 for a basement or slab home, a real number buyers and sellers negotiate around as a closing credit rather than a minor line item. Keep the installation paperwork and test documentation with the house records.
What should a complete installer quote include?
A complete quote itemizes labor, pipe/fittings/sealant, fan hardware, electrical hookup, any permit fees, a post-install retest, and warranty terms on both the fan and the workmanship. Ask for the fan model and its standalone replacement price up front, since that is the recurring cost you will pay again in 7-10 years, and ask whether each complexity adder on this page applies to your home.
Sources
Cost ranges: Peerless Environmental, Radon Mitigation Cost guide (2026); Lawnstarter, How Much Does a Radon Mitigation System Cost (2025); Health Canada, Radon Reduction Guide for Canadians (fan electricity $50-$75/yr CAD); Take Action on Radon / Homeowner.ca cost summaries (Canadian installed ranges $2,000-$3,000). All figures are US dollars unless noted.
This page provides cost-planning estimates for radon mitigation systems. It is not health advice. Follow EPA guidance and consult a licensed mitigator for your home.
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