How Much Does Radon Mitigation Cost?
$800 – $2,500
National average: $1,500 installed
Interactive worksheet
Radon mitigation cost calculator
Set the scope, size, and state — the tally updates as you go. Built from this guide's figures and BLS state wage data.
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State figures apply BLS construction wages (2025) at a 60% labor weight — how we estimate.
Your estimate
- Labor ≈60%
- $900
- Materials & equipment
- $600
- Planning range
- $1,350 – $1,650
low $800 $2,500 high
U.S. construction trades average $65,360/yr (BLS 2025).
Get three written bids. One far under $1,200 usually means missing scope — ask what's not included. Far over $1,800, ask what's driving the number.
Radon is a colorless, odorless gas that’s the second-leading cause of lung cancer — and a common flag on home inspections. A mitigation system to vent it costs $800 to $2,500 in 2026, averaging around $1,500, depending on your foundation.
What you’re paying for
Most systems are simple in concept: a vent pipe and a fan that pull radon from under your foundation and release it above the roof, before it builds up indoors. The price covers the pipe routing, fan, sealing, electrical, and testing.
Foundation type drives the cost
A single basement slab is the cheapest to treat. Crawl spaces need a sealed membrane, and homes with multiple foundation types need more suction points — both push the price up.
Test first
Don’t mitigate blind. A test ($150–$300, or a cheap DIY kit) tells you whether you’re above the EPA’s 4 pCi/L action level. Post-mitigation testing confirms the system worked.
How to save on radon mitigation
- Test before you build a system — you may not need one.
- Get a few quotes; system pricing varies more than the work does.
- Bundle crack and sump sealing into the install for efficiency.
- Keep the fan accessible for the occasional replacement (every ~10 years).
| Component | Typical range | Notes |
|---|---|---|
| Radon test (pre/post) | $150 – $300 | — |
| Vent pipe & routing | $300 – $800 | — |
| Radon fan | $150 – $500 | — |
| Sealing cracks & sump | $100 – $500 | — |
| Labor & electrical | $300 – $800 | — |
| Option | Typical range | Notes |
|---|---|---|
| Sub-slab depressurization (basement) | $800 – $1,800 | Most common |
| Slab-on-grade | $1,000 – $2,000 | — |
| Crawl space (membrane + fan) | $1,500 – $2,500 | — |
| Complex / multiple foundations | $2,000 – $4,000 | — |
What affects the price
- Foundation type A single basement slab is straightforward; crawl spaces need a sealed membrane, and homes with multiple foundation types need more suction points.
- System design Most homes use sub-slab depressurization — a pipe and fan that pull radon from under the slab and vent it above the roof.
- Radon level & layout Higher levels or a sprawling footprint may need a larger fan or multiple suction points.
- Sealing work Sealing foundation cracks and the sump pit improves the system and adds modest cost.
- Testing Pre- and post-mitigation tests confirm the system brought levels down — a small but important line item.
Radon mitigation cost by state
Where you live moves the price as much as any option you pick, because labor is a big share of the bill and construction wages differ sharply by state. Adjusted with BLS wage data (2025), a typical radon mitigation job runs about $940 – $2,900 in Hawaii (+17%) versus $680 – $2,100 in Arkansas (−15%).
See the typical range in all 50 states + D.C.
| State | Typical range |
|---|---|
| Alabama | $700 – $2,200 |
| Alaska | $920 – $2,900 |
| Arizona | $760 – $2,400 |
| Arkansas | $680 – $2,100 |
| California | $900 – $2,800 |
| Colorado | $800 – $2,500 |
| Connecticut | $860 – $2,700 |
| Delaware | $780 – $2,500 |
| District of Columbia | $860 – $2,700 |
| Florida | $730 – $2,300 |
| Georgia | $740 – $2,300 |
| Hawaii | $940 – $2,900 |
| Idaho | $750 – $2,400 |
| Illinois | $920 – $2,900 |
| Indiana | $810 – $2,500 |
| Iowa | $780 – $2,400 |
| Kansas | $760 – $2,400 |
| Kentucky | $740 – $2,300 |
| Louisiana | $720 – $2,300 |
| Maine | $780 – $2,500 |
| Maryland | $800 – $2,500 |
| Massachusetts | $920 – $2,900 |
| Michigan | $800 – $2,500 |
| Minnesota | $870 – $2,700 |
| Mississippi | $700 – $2,200 |
| Missouri | $820 – $2,600 |
| Montana | $780 – $2,500 |
| Nebraska | $750 – $2,400 |
| Nevada | $820 – $2,600 |
| New Hampshire | $790 – $2,500 |
| New Jersey | $910 – $2,800 |
| New Mexico | $740 – $2,300 |
| New York | $880 – $2,800 |
| North Carolina | $720 – $2,300 |
| North Dakota | $810 – $2,500 |
| Ohio | $800 – $2,500 |
| Oklahoma | $730 – $2,300 |
| Oregon | $880 – $2,800 |
| Pennsylvania | $810 – $2,500 |
| Rhode Island | $830 – $2,600 |
| South Carolina | $730 – $2,300 |
| South Dakota | $720 – $2,300 |
| Tennessee | $740 – $2,300 |
| Texas | $730 – $2,300 |
| Utah | $750 – $2,400 |
| Vermont | $780 – $2,400 |
| Virginia | $760 – $2,400 |
| Washington | $930 – $2,900 |
| West Virginia | $760 – $2,400 |
| Wisconsin | $830 – $2,600 |
| Wyoming | $790 – $2,500 |
Estimates apply each state's BLS construction-wage multiplier to this guide's national range — a planning number, not a quote. Browse the full state cost guides or our methodology.
Frequently asked questions
- How much does a radon mitigation system cost?
- Most radon mitigation systems cost $800–$2,500, averaging about $1,500. A standard basement sub-slab system is at the lower end; crawl spaces and complex foundations cost more.
- How do I know if I need radon mitigation?
- Test first. The EPA recommends fixing radon if your level is 4 pCi/L or higher, and considering it between 2 and 4. A short-term test kit is cheap; a professional test runs $150–$300.
- How does a radon mitigation system work?
- The most common system, sub-slab depressurization, uses a fan and vent pipe to draw radon gas from beneath the foundation and release it above the roofline, before it can enter the home.
- Is radon mitigation worth it?
- Yes — radon is the second-leading cause of lung cancer, and mitigation is a relatively cheap, permanent fix. It also reassures buyers, since elevated radon often comes up in home inspections.
- How much does radon testing cost?
- A DIY short-term test kit is $15–$40; a professional test is $150–$300. Testing before and after mitigation confirms the system actually lowered your levels.
How we estimate: ranges reflect typical U.S. pricing for materials and professional installation, compiled and cross-checked against the current (2026) industry sources listed below (see our data & methodology). Your actual cost depends on your location, project size, material grade, and local labor rates — always get multiple written quotes before you commit.
Sources
Cost ranges on this page were checked against current (2026) data from these industry sources:
- Radon Mitigation Cost (2026) — HomeGuide
- How Much Does Radon Mitigation Cost? — Angi
- Health Risk of Radon — U.S. EPA