How Much Does a Radon Mitigation System Cost in 2025?
The average radon mitigation system cost is $1,028
The average cost to install a radon mitigation system is $1,028, with most homeowners spending between $786 and $1,274.
System costs vary based on factors like home size, foundation type, and regional labor rates.
Active suction systems, the most common type, use fans to reduce radon levels, while passive systems rely on natural airflow.
Hiring a licensed radon professional ensures safe installation, regulatory compliance, and long-term protection of indoor air quality.
This article was updated using automation technology and thoroughly reviewed for accuracy by HomeAdvisor Editor Ryan Noonan.
Most homeowners spend between $786 and $1,274 on a radon mitigation system, with an average cost of $1,028. Smaller homes can cost as little as $395, while larger homes or those with complex designs can reach up to $2,453, especially if you choose advanced methods like water mitigation.
Radon is an odorless, invisible gas that can pose serious health risks over time. Fortunately, you can keep your family safe with a professionally installed mitigation system. Labor, system type, testing, and inspection all influence what you’ll pay, so be sure to budget for each of these line items. Working with a licensed radon pro ensures the system meets local code and performs as intended.
Radon Mitigation System Cost Factors
A radon mitigation system is tailored to your home, so costs can vary based on several factors.
Location
Where you live plays a big role in your final price. Your local cost of living, the availability of qualified radon specialists, and region-specific EPA rules all influence 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 required for sewer lines and water pipes, as well as the energy costs to heat your home.
Labor and Permits
Most quotes include labor in the total price, and seasoned contractors generally charge more than newer professionals. 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 mitigation system, including a radon fan. A licensed electrician will need to wire and install the fan.
Testing and Inspection
Expect to pay between $150 and $800 for a professional radon test when radon gas is suspected in the home or water supply. DIY test kits are less expensive, but their results are less reliable.
Foundation Improvements
If your home has a crawl space with no foundation slab, you may need encapsulation. Crawl space encapsulation costs anywhere from $1,500 to $15,000. This involves installing plastic vapor barriers and sealing their edges with PVC pipe underneath to create a vacuum. If an exterior mitigation system is also installed, a price break is often available 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 range from $1,200 to $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 the naturally rising air in your home to remove gas through a system of pipes.
| System Type | Average Type |
|---|---|
| Active suction | $1,000–$3,000 |
| Passive depressurization | $500–$2,500 |
DIY vs. Hiring a Radon Mitigation Pro
The EPA discourages DIY radon mitigation. A licensed radon pro in your area will have the tools and training to remove the gas safely and protect your indoor air quality, giving your family peace of mind.
Plan to gather at least three written quotes, read recent customer reviews, and confirm each specialist’s licenses and certifications before signing a contract. A qualified pro can design a system tailored to your home and ensure long-term radon protection.
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 suited for monitoring after a professional test or the installation of a mitigation system. 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
The only way to know whether your home or water supply contains radon is to schedule a professional test. A qualified radon inspector will collect samples, deliver lab-verified results, and explain the findings for $150 to $800. Once you know your exact levels, you and your radon mitigation pro can choose the right system and tackle the problem before it affects your family’s health.
Both roles tackle radon, but they focus on different steps. Inspectors test your home, interpret the results, and determine whether levels exceed EPA guidelines. Mitigation pros design and install the system that lowers those levels. Some companies do both, but the skills and equipment differ, so always verify that the person you hire is properly certified for the specific service you need.
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 reliably reduce radon levels.
Radon mitigation systems generally last between 10 and 30 years, depending on system type and maintenance. Passive systems endure the longest because they have no moving parts, whereas active systems, which use a fan, require fan replacement every 5 to 10 years. System components, such as PVC pipes, seals, and fittings, can remain effective for decades when paired with periodic inspections and proper maintenance.
Radon mitigation systems consume between 300 and 3,000 kWh of electricity per year, depending on fan size and system design. On average, an active radon fan draws 100 to 300 watts continuously, which translates to roughly 876 kWh annually, and adds $30 to $300 to your energy bill each year. Choosing a high-efficiency fan and ensuring tight sealing around pipes helps minimize these ongoing costs.
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