2026 Cost Guide
How Much Does Radon Mitigation Cost?
Most homeowners pay $1,200 to $1,500 for a professional radon mitigation system. The typical range is $800 to $2,500 depending on your home's foundation, size, and location.
$800
Low End
$1,350
Average
$2,500
High End
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Radon Mitigation Cost at a Glance
| Factor | Details |
|---|---|
| National average | $1,200 – $1,500 |
| Typical range | $800 – $2,500 |
| Extreme cases | Up to $3,000 – $5,000+ |
| DIY kits | $200 – $500 |
| Installation time | 4 – 8 hours (1 day) |
| Annual operating cost | $50 – $100 electricity |
Radon Mitigation Cost by System Type
The type of radon mitigation system your home needs is the single biggest factor in overall cost. Here's what each system type typically costs, including installation.
| System Type | Cost Range |
|---|---|
| Sub-Slab Depressurization | $1,000 – $2,500 |
| Sump Pit Suction | $800 – $1,800 |
| Crawl Space Encapsulation | $1,200 – $3,000 |
| Drain Tile Suction | $800 – $1,500 |
| Block Wall Suction | $1,500 – $3,000 |
| Water Radon Treatment | $3,000 – $5,000 |
Sub-Slab Depressurization (SSD) — $1,000 to $2,500
Sub-slab depressurization is the most common and effective radon mitigation method, used in roughly 90% of residential installations. A contractor drills a hole through the basement slab, inserts a PVC pipe, and connects it to a fan that creates negative pressure beneath the foundation. Radon-laden soil gas is pulled from under the slab and vented safely above the roofline.
A standard single-point SSD system runs $1,000 to $1,500. Larger homes or homes with poor sub-slab communication may need additional suction points, pushing costs to $2,000 to $2,500. The fan runs continuously and uses about the same electricity as a 75-watt light bulb.
Sump Pit Suction — $800 to $1,800
If your home already has a sump pit, a radon contractor can often use it as the suction point, reducing installation cost significantly. The sump cover is sealed airtight, and a pipe and fan are connected to draw radon from beneath the slab through the existing pit. This is often the most affordable option when a sump pit is already in place and properly positioned.
Crawl Space Systems — $1,200 to $3,000
Crawl space radon mitigation typically involves laying a thick polyethylene vapor barrier across the exposed soil, sealing it to the foundation walls, and installing a suction system beneath it. This approach — called sub-membrane depressurization — also helps with moisture control. Costs are higher because of the labor involved in sealing the crawl space and the additional materials required. Complex crawl spaces with piers, multiple levels, or poor access can push costs toward $3,000 or more.
Water Radon Treatment — $3,000 to $5,000
Homes on private wells may have radon dissolved in their water supply. Aeration systems ($3,000–$5,000) bubble air through the water to release radon gas, which is then vented outside. Granular activated carbon (GAC) systems cost $1,000–$2,500 but require periodic filter changes and are best suited for moderate radon-in-water levels. Water treatment is typically done in addition to air mitigation, not instead of it.
Radon Mitigation Cost by Home Size
Larger homes often need additional suction points or longer pipe runs, which increases cost. Here are typical ranges based on home square footage.
| Home Size | Estimated Cost |
|---|---|
| Under 1,000 sq ft | $800 – $1,200 |
| 1,000 – 2,000 sq ft | $1,000 – $1,500 |
| 2,000 – 3,000 sq ft | $1,200 – $2,000 |
| 3,000 – 5,000 sq ft | $1,500 – $2,500 |
| 5,000+ sq ft | $2,000 – $3,500+ |
Radon Mitigation Cost by Region
Labor rates, permitting requirements, and demand levels vary by region. Areas with higher radon prevalence often have more competition among contractors, which can moderate prices. Major metro areas tend to cost more due to higher labor and overhead.
| Region | Typical Cost |
|---|---|
| Northeast | $1,200 – $2,500 |
| Midwest | $800 – $1,800 |
| South | $1,000 – $2,000 |
| Mountain West | $1,000 – $2,200 |
| West Coast | $1,300 – $2,800 |
What Factors Affect Radon Mitigation Cost?
Foundation Type
Basements with poured concrete are the simplest and cheapest to mitigate. Crawl spaces require vapor barriers. Slab-on-grade homes may need longer pipe runs. Homes with multiple foundation types (e.g., a basement plus a crawl-space addition) cost the most.
Home Size & Layout
Larger footprints may require multiple suction points and longer pipe runs. Split-level homes, additions, and complex layouts increase installation complexity and cost.
Number of Suction Points
Each additional suction point adds $300 to $600 to the total cost. Diagnostic testing determines how many points are needed based on sub-slab communication — how easily air flows beneath the foundation.
Local Labor Rates
Installation labor accounts for 50–60% of total cost. Rates vary significantly by metro area and state. Urban areas and regions with high demand typically charge more.
Pipe Routing & Aesthetics
Interior pipe routing through closets and attics is standard. If the pipe must run along the exterior of the home, costs may increase for weather-resistant materials, painting, and aesthetic considerations.
Existing Radon Levels
Extremely high radon levels (above 20 pCi/L) may require more powerful fans or additional suction points to achieve levels below 4 pCi/L, adding to total cost.
DIY vs. Professional Radon Mitigation
DIY radon mitigation kits are available for $200 to $500, but there are significant trade-offs compared to professional installation. Here's an honest comparison.
| Factor | DIY ($200–$500) | Professional ($800–$2,500) |
|---|---|---|
| Success rate | Variable — depends on skill | 95%+ reduction guaranteed |
| Warranty | No warranty | 1–5 year system warranty |
| Diagnostic testing | Not included | Included (sub-slab communication test) |
| Permits | Your responsibility | Handled by contractor |
| Post-install testing | You buy your own test | Usually included or discounted |
| Resale impact | May not satisfy buyers | Fully documented for resale |
| Time investment | 8–16 hours | 4–8 hours (you do nothing) |
⚠️ Our recommendation
Unless you have construction experience and are comfortable coring concrete, running PVC through your home, and working on your roof, professional installation is strongly recommended. An improperly installed system can fail to reduce radon, create backdrafting issues, or even increase radon levels in certain rooms. The peace of mind, warranty, and guaranteed results are well worth the additional cost.
How to Save Money on Radon Mitigation
Get multiple quotes
Always compare at least 3 quotes from certified radon professionals. Prices can vary by $500 or more for the same work. Our free quote service makes this easy.
Ask about off-season discounts
Spring and summer are slower seasons for many radon contractors. You may get 10–15% off by scheduling during these periods instead of fall or winter.
Bundle testing and mitigation
Many contractors offer a discount if you hire them for both testing and mitigation. Some will credit the testing cost toward mitigation.
Check for state assistance programs
Some states offer financial assistance, low-interest loans, or grants for radon mitigation. Contact your state radon office for details.
Choose interior pipe routing
Exterior pipe runs add cost for weather protection and painting. Interior routing through a closet or utility chase is usually cheaper and more effective.
Radon Mitigation Cost FAQ
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