1. Quick Cost Overview
Most homeowners spend between $800 and $2,500 on a complete radon mitigation system in 2026. The average installation in Metro Atlanta runs about $1,200 to $1,500. These prices include the system components, professional installation, and post-mitigation testing to verify the system works.
Get Your Estimate
Want a quick estimate based on your home's specifics? Use our free radon mitigation cost calculator to get a personalized price range in about 30 seconds.
The wide price range exists because no two installations are identical. A straightforward slab-on-grade home with accessible routing can be on the lower end. A large home with a complex foundation, multiple suction points, or difficult pipe routing will cost more. We will break down exactly what moves the price in each direction.
2. Cost by Mitigation System Type
The type of mitigation system installed is the biggest factor in cost. Here is what each system type typically runs:
| System Type | Cost Range | Best For |
|---|---|---|
| Sub-slab depressurization (SSD) | $800-$2,000 | Slab-on-grade and basement homes |
| Sub-membrane depressurization (SMD) | $1,200-$2,800 | Crawl space homes |
| Drain tile suction | $800-$1,500 | Homes with existing drain tile systems |
| Sump hole suction | $800-$1,300 | Homes with sump pits |
| Block wall suction | $1,000-$2,000 | Homes with hollow block foundations |
| Crawl space encapsulation + SMD | $2,000-$4,500 | Crawl spaces needing moisture control |
Sub-slab depressurization is the most common system type, accounting for roughly 80% of residential installations. It works by drilling a hole through the concrete slab, inserting a pipe, and connecting it to a fan that draws soil gas from beneath the foundation and vents it above the roofline.
For crawl space homes, sub-membrane depressurization costs more because it requires installing a vapor barrier (heavy-duty polyethylene sheeting) across the entire crawl space floor before the suction system can work effectively. If your crawl space also needs encapsulation for moisture control, the combined cost is higher but addresses two problems at once.
3. Cost by Foundation Type
Your foundation type is the second biggest factor because it determines which mitigation approach is needed and how complex the installation will be.
Slab-on-Grade
$800-$1,500
The simplest installation. One suction point through the slab, PVC pipe routed to the exterior, and a fan mounted outside or in the attic. Most slab homes need only one suction point, keeping costs on the lower end.
Basement
$1,000-$2,200
Similar to slab but may need multiple suction points for larger footprints. Finished basements add cost if pipe routing requires going through living space. Exterior pipe routing is often preferred for aesthetics.
Crawl Space
$1,200-$3,000+
Requires sub-membrane depressurization with a full vapor barrier. If the crawl space is difficult to access, has irregular dimensions, or needs encapsulation, costs increase. Multiple suction points may be needed for large crawl spaces.
Some homes have combination foundations (basement plus crawl space, or slab plus crawl space). These typically cost more because each foundation section may need its own suction point and vapor management approach. Use our cost calculator to get an estimate based on your specific foundation type.
4. What Drives the Price Up or Down
Beyond system type and foundation, several factors can push your cost higher or lower:
Factors That Increase Cost
Factors That Decrease Cost
5. Get Your Personalized Estimate
General price ranges are helpful, but your cost depends on your specific home. Our radon mitigation cost calculator factors in your foundation type, home size, and other details to give you a more accurate estimate.
Free Cost Calculator
Answer a few questions about your home and get an instant price estimate. No contact information required.
The calculator provides a range, not a fixed quote. For an exact price, a contractor needs to evaluate your home in person. But the estimate helps you understand whether you are looking at a $900 job or a $2,500 job before you schedule the evaluation.
If you do not know your current radon level yet, start with our zip code radon risk lookup to understand your area's risk level, then schedule a test to get your actual number.
6. Is Radon Mitigation Worth the Cost?
When you break down the numbers, radon mitigation is one of the best value home safety investments available:
The cost of not mitigating is harder to quantify but far greater. Lung cancer treatment averages $60,000-$150,000+, and the human cost is immeasurable. A $1,200 mitigation system is a straightforward investment by comparison.
7. How to Save on Radon Mitigation
While you should never cut corners on radon mitigation quality, there are legitimate ways to manage costs:
What Not to Do
Do not attempt DIY radon mitigation. While the components seem simple, improper installation can fail to reduce radon, create backdrafting issues with combustion appliances, or actually increase radon levels by creating new pathways. Professional installation ensures the system works correctly and comes with post-mitigation testing to verify results.
