How Much Does a Radon Mitigation System Cost in 2025?
A radon mitigation system costs an average of $1,028
Most radon mitigation systems cost between $786 and $1,273 or an average of $1,028, depending on type and complexity.
Factors affecting cost include location, labor, permits, testing, inspections, and foundation improvements.
You need radon mitigation if tests show radon in your home or water supply.
Professional radon mitigation ensures proper installation and compliance with local regulations.
This article was updated using automation technology and thoroughly reviewed for accuracy by HomeAdvisor Editor Ryan Noonan.
Most homeowners spend between $786 and $1,273 on a radon mitigation system, with an average cost of $1,028. In larger homes or those with complex designs, costs can reach up to $5,000, especially if you choose advanced methods like water mitigation.
Radon is an odorless, invisible gas that can pose serious health risks over time. Fortunately, proper mitigation ensures your home's safety and air quality. Key factors influencing the cost include labor, system type, testing, and inspection. Hiring a radon mitigation professional guarantees correct installation and compliance with local regulations.
Radon Mitigation System Cost Factors
A radon mitigation system is tailored to your home, so costs can vary based on several factors.
Location
The local cost of living, the number of specialists in the area, and any EPA regulations specific to the region will impact mitigation rates.
Your contractor may recommend a different radon mitigation method based on your home's geographical location. In colder climates, adding extra ventilation can increase the amount of insulation needed on sewer lines and water pipes and the energy costs to heat your home.
Labor and Permits
Labor costs are typically included in your project total, with experienced contractors charging higher rates. Since radon gas poses serious health risks, hiring a qualified professional is essential. When comparing companies, request fixed quotes upfront to ensure accurate pricing.
Permits for radon mitigation work may cost between $25 and $150. Additional permits and inspections are likely required for projects involving electrical work, such as installing a radon fan. A licensed electrician will need to wire and install the fan.
Testing and Inspection
If radon is suspected in the home or water supply, a professional test can be conducted for $150 to $800. You can also purchase a DIY radon testing kit, though the results are less reliable.
Foundation Improvements
The home's foundation will help determine the radon mitigation method required, which can impact costs. In homes with fully unfinished basements, the contractor may suggest basement sealing in conjunction with an active or passive ventilation system.
Homes with a crawl space but no foundation slab may require encapsulation. Crawl space encapsulation costs anywhere from $1,500 to $15,000. This involves installing plastic vapor barriers and sealing them along their edges, with PVC pipe underneath to create a vacuum. If an exterior mitigation system is also installed, there is often a price break in the total cost.
Radon Water Mitigation Costs
Radon has a minimal effect on water, but it can be released into the air through showers, dishwashers, or taps and becomes harmful when airborne. Water mitigation costs between $1,200 and $5,000.
Radon Mitigation System Costs by Type
There are two main types of radon mitigation systems.
The most common type is active suction systems, also called soil depressurization systems. These use a fan to create a vacuum that removes trapped gas under the foundation.
Passive depressurization systems do not use a fan—they rely on your home's naturally rising air to remove gas through a system of pipes.
| System Type | Average Cost |
|---|---|
| Active suction | $1,200–$5,000 |
| Passive depressurization | $500–$2,500 |
DIY vs. Hiring a Radon Mitigation Pro
The EPA does not recommend DIY radon mitigation. To effectively remove radon gas and maintain your home's air quality, it's essential to hire professional radon mitigators. Professionals ensure the job is done correctly, giving you peace of mind that your family is safe.
Finding the right mitigation specialist requires a little comparative investigation. Check reviews and ratings for any professional you find and always ask about experience and any licenses or certifications they have.
While you should avoid installing a radon mitigation system on your own, you can buy a radon monitoring device. These are excellent for long-term measurements and provide results that are more comparable to those of professional testing. They are best for monitoring after a professional test or a mitigation system installation. They work with a simple portable digital device left in your home's lowest level.
How HomeAdvisor Gets Its Cost Data
No place is more important than your home, which is why HomeAdvisor connects homeowners with local pros to transform their houses into homes they love. To help homeowners prepare for their next project, HomeAdvisor provides readers with accurate cost data and follows strict editorial guidelines. We surveyed thousands of real customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Frequently Asked Questions
You need a professional radon test to determine if radon is present in your home or water. A qualified radon inspector can provide accurate measurements, costing between $150 and $800. This information helps you decide on the necessary steps to remove radon from your home when you hire a professional radon mitigation company.
Radon inspectors and radon treatment professionals have distinct roles. Inspectors measure radon levels and assess your home's risk, while treatment professionals install systems that reduce radon concentrations. In some cases, a single expert may perform both functions; however, each responsibility requires specific expertise to ensure accurate testing and safe system installation.
Installing a mitigation unit fixes radon problems by reducing indoor gas levels to established safe standards. A system designed and installed by a mitigation expert, tailored to your home's specific layout and foundation, guarantees effective radon reduction. This expert installation ensures consistent performance over time while safeguarding your indoor air quality.
Open windows and doors do not reduce radon levels because they trigger a pressure imbalance that draws radon-laden air into your home. This practice fails to control radon concentration and can even worsen the issue. An active suction mitigation system provides a proven, safe, and effective solution to reduce radon levels reliably.
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