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How Much Does Radon Mitigation Cost?

Typical Range: $772 - $1,190

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Radon Mitigation Costs

Radon mitigation costs depend on a number of factors including your home's design and size, type of foundation and geographical location. Nationwide, radon mitigation averages $981 with a typical range between $772 and $1,190. Larger homes, or those with complex configurations, may reach as high as $3,000.

the average cost to remove radon gas is $975 or $450 to $1,500.

Radon gas removal is common in both newer and older homes. It is a colorless, odorless radioactive gas present in all 50 states with levels varying widely, even in the same neighborhood. It forms naturally from decaying radioactive elements, such as uranium, present in the ground.

It enters through a home's stack effect. This effect occurs when warm air rises and leaves the upper floors and attic. When the air exits, it creates a vacuum in the lower levels. This vacuum pulls air and trapped radon gases from beneath the foundation, through porous concrete and tiny cracks in the foundation. More enters in the winter when the stack effect is more pronounced. Because of this, winter is the best time to test for radon.

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National Average $981
Typical Range $772 - $1,190
Low End - High End $400 - $1,576

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Cost data is based on actual project costs as reported by 3,664 HomeAdvisor members in .

Radon Reduction System Costs

There are two main types of mitigation systems: depressurization and lower level pressurization. Sealing the basement is another method, though it's up to 50% less effective than the other methods. It's best used together with depressurization or pressurization systems.

Depressurization comes in two varieties: active and passive.

  • Active suction, or soil depressurization, is the most common type used by professional mitigators and comes in a variety of sub-types discussed below. It uses a fan to create a vacuum under your foundation.
  • Passive depressurization is identical in every way to active depressurization minus the use of a fan. Instead of a fan, it utilizes a pipe and the home's naturally rising air to remove harmful gases.
Radon Mitigation Costs by Type
Active Sub-Slab Depressurization or Suction$700 - $3,000
Passive Suction$500 - $2,500
Lower Level Pressurization$500 - $1,000
Sealing$400 - $1,500

Active Sub-Slab Depressurization System Costs

Depressurization systems, also called sub-slab or soil suction, cost between $1,000 and $3,000. It is the most commonly used method of mitigation. These systems remove trapped gas that exists directly under the floor of basements and crawlspaces by creating a vacuum.

The systems use PVC pipe installed below the foundation or crawlspace that runs up to the roof of the house or away into a corner of your yard. It includes a continuously running inline fan along the length of the PVC. This fan creates suction under the foundation which keeps radon from finding its way in.

Different applications of sub-slab depressurization systems, such as using drain tile vs block, come at slightly varying costs.

Active Sub-Slab Suction/Depressurization System Costs
Sub-Slab$800 - $2,500
Drain Tile$800 - $1,700
Sump Hole$800 - $2,500
Block$1,500 - $3,000

Radon Mitigation System Installation Estimates

The installation cost of a mitigation system is usually a flat fee ranging from $500 to $3,000. Quoted project prices include labor.. It takes anywhere from 3 to 7 hours to install a system, although finished basements or very large homes with multiple foundations may take longer.

Radon Fan or Pump Prices

Fans cost $100 to $300 or more depending on its size and power. You'll also need a suction monitor or u-tube manometer to monitor suction for an additional $10 to $20.

The fan will run continuously throughout the year. They use an additional $30 to $300 in power annually depending on the size of fan and local power prices. They are usually quiet and installed in the attic space or at ground level for exterior installations.

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Drain Tile Suction

Drain tile suction systems cost $800 to $1,700 or more. This system taps into the drain tiles that surround a house, creating a suction field under the foundation.

Basements with slab foundations located in areas with high water tables or with drainage issues often use drain tiles. Drain tiles around the perimeter of the slab offer an excellent area for suction. They can be either internal, underneath the slab, or placed around the exterior footings. Installation costs will vary depending on placement.

Sealed Sump Pump Hole Systems

It costs $800 to $2,500 to install systems that tap into existing sump pumps cracks, or holes, where the pump sits. The top of the crock is sealed completely to keep the vacuum under the foundation. Often, this type is connected to drain tile, though not all have a tile system.

If you're looking to install both a mitigation system and a sump pump, add the sump pump installation costs of $700 to $2,000 to your project total.

Block Suction Method

Blockwall suction systems cost $1,500 to $3,000 using cinder block construction. This system creates suction within the hollow walls themselves. It is both costlier and less effective than sub-slab systems.

Talk to Radon Specialists Near You to Get a Quote

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Passive Soil Suction Systems

Passive systems cost slightly less to install at $500 to $2,500. Passive systems work identical to active systems minus the fan. PVC runs from under the slab or in the crawlspace up through the house or exterior wall and vents above the roof.

This system uses a home stack effect, pressure differentials and air currents to remove radon. Some systems include a vapor barrier or other sealant.

However, since radon is much heavier than air, they are not effective in homes with high levels of radon. The good news is, upgrading these systems to active types only requires installing a fan so long as there is space to do so

New Construction Radon Mitigation Code Requirements

Some local and state building codes require passive systems in all new construction as a preventative measure. Upgrading to an active system during the construction phase of a new home may come at a discount. Check with your general contractor for specifics.

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Basement & Finished Lower Levels Pressurization

Pressurizing basements costs $500 to $1,000. Pressurization occurs by sealing the lower levels and blowing air into them. This process counters the vacuum of the stack effect keeping gas from entering the through the foundation.

This method is only effective on airtight homes. Depending on climate, it can drastically increase utility costs. Plus, annual fan electricity costs are an additional $150 to $300. At best, it's a temporary solution while more permanent systems are installed.

Sealing the Home

Basement sealing costs $4,600 on average though simply caulking cracks can run as little as $5 for a tube of sealant. Seal unfinished basements in a DIY fashion for between $400 to $1,000 with products like RadonSeal.

Most mitigation systems work with active or passive suction devices to create a vacuum in spaces that trap gas. Sealing your home may reduce the levels slightly but works best in conjunction with other systems.

You should seal your home on a regular basis to prevent new infiltration of gas.

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Radon Removal Cost by Foundation Type

Regardless of foundation type, you'll spend an average of $1,200 on radon removal. There are three main types of foundations that require slightly different mitigation solutions: On-grade slab, below-grade slab (basement) and crawlspace.

  • Basements require drilling a hole or using a sump pump hole for PVC pipe installation below the ground slab.
  • On-grade slabs often place PVC pipe in from the exterior side of the house, though drilling through the floor is not uncommon.
  • Crawls spaces use an encapsulation technique with the PVC extruding from beneath a plastic membrane. Crawlspaces may take more time to install due to accessibility and therefore cost slightly more. Actual pricing will vary significantly from home to home.

Average Cost of Radon Mitigation in Crawl Spaces

Radon membrane prices range from $800 to $3,000. Unless the crawlspace is already encapsulated, the cost will increase. Most crawl spaces have no slab, just open soil that can allow the gas to migrate into the living space.

Crawl space encapsulation costs $1,500 to $15,000 when done alone. Together with a mitigation system installation, you may get a discounted price. Plastic vapor barriers are placed across the entire area under the home and sealed along the edges.

PVC pipe is then used to create a vacuum under the membrane exactly like under-slab types. A 10 ml plastic membrane is usually a part of the encapsulation process. An exterior mitigation system uses a vent to draw gas up and out of the crawl space.

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Radon Water Mitigation Costs

Water mitigation by aeration or carbon filter scrubbing costs $500 to $5,000. Radon has minimal effect while in the water, but once it reaches a shower, dishwasher or tap it's released into the air, adding to airborne concentrations.

Putting in an Aeration or Bubble Up System

An aeration system ranges from $4,000 to $5,000. They are expensive but the best way to filter water with 95% to 99% radon removal rates.

The Bubble-Up system, a type of aeration system, quietly works by injecting air into the water to release radon inside the unit, which then captures it and vents the gas outside.

Charcoal Scrubbing System

Charcoal scrubbers only cost between $500 and $1,500 but only remove about 75% of radon from your water. However, they also clean the water of other chemicals and metals.

Ask a Pro Which Mitigation Method Is Best for You

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Ventilation & Filtration Radon Abatement Methods

Whole-home air filtration systems cost $2,000 on average and use HEPA filters to help remove the decayed radon material but will not reduce radon levels. While air filtering is an excellent and inexpensive method to improve your air quality, it is not a substitute for professional mitigation systems.

Circulating air by opening windows and doors will not reduce radon levels and may make the problem worse. Talk to a pro about properly ventilating your crawlspace instead.

Radon Testing Kits & Smart Devices

Testing kits and smart devices range from $12 to $250. These are available through most online retailers and at some home improvement stores like Home Depot, Menards and Lowe's.

Professional radon testing costs $150 to $800 so these kits may seem like an attractive way to save money. These kits and smart devices are great for screening, but don't use them in place of a professional test.

  • Short-term Radon Testing Kits: $12-$50. Great for initial screenings but with questionable results. They test for 48 to 72 hours and then sent to a lab for results.
  • Home Radon Digital Monitors & Smart Devices: $150-$250. Excellent for long-term measurements and provide results more comparable to professional testing. Best for monitoring after a professional test or a mitigation system installation. They work with a simple portable digital device left in your homes lowest level

Find Radon Testing & Mitigation Pros In Your Area

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How to Find & Hire a Radon Mitigation Professional

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. You can find radon mitigators near you through our database of screened and qualified professionals.


What is radon gas?

Radon gas is odorless and invisible to the human eye. It is a radioactive gas that occurs naturally deep within the soil. The natural decay of uranium in rock and soil deep in the earth form radon gas. All 50 states have radon, though it's found more frequently in the Northeast, Midwest and Northern Mountain Regions.

It moves through the air and water. It has a decay life of approximately 4 days, meaning gas can build up quickly depending on ventilation.

Radon is the second leading cause of lung cancer in the United States with an estimated 21,000 preventable deaths per year according to the CDC. It's the second leading cause among smokers or those who have smoked cigarettes and the first leading cause among non-smokers.

How do I know if I have radon in my home or water supply?

The easiest way to know if you have radon in your home or water supply is to have a professional come and do a test. Radon testing costs between $150 to $800. Learn more about radon testing.

Are radon inspectors and radon treatment professionals the same?

Radon inspectors and treatment professionals are not the same. However, they often work out of the same office. Inspectors test your home while treatment pros install mitigation systems. Some pros play the role of both inspector and installer.

How much does radon fan replacement cost?

Repairing or replacing a radon fan can cost $150 to $400. The same professionals you hired to install your system are generally the ones you call for repairs.

Will installing a mitigation unit fix my radon problem?

Having a professional mitigation expert install a system designed specifically for your home will reduce the gas to safe levels. Improperly installed systems and DIY fixes can often make the problem worse.

How much electricity does a radon fan use?

The amount of electricity your radon fan uses depends on the size of the fan. For instance, the average fan will use about 876 kwh per year. Assuming the average cost of a kwh is $0.10, the annual cost will range from $30 to $300 depending on the size of the fan.

Do open windows help get rid of radon gas?

Opening windows and doors does not always reduce radon levels. It's possible to create suction through a stack effect, making the problem worse. The best and safest way to get rid of radon is an active-suction mitigation system. Talk to a pro about installation.

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