How Much Does it Cost to have a radon Mitigation System installed?

Sump/ French Drain

A home with a sump or french drain will typically be the least difficult, and most effective type of installation. These systems basically interconnect, either directly or through the sump, to the existing perforated piping around the foundation. The drain provides a great way to dissipate the pressure field all the way around the home, and often work so well that levels drop within hours. This type of mitigation system will typically start at around $950, and around $600 if the builder left accommodations for the installation of a system.

Sub-Slab Depressurization

A sub-slab depressurization system involves drilling a 5” hole through either the interior concrete basement slab vertically or through the stem wall horizontally from the exterior, and removing 10-15 gallons of soil to create a suction pit under the slab. These systems start at around $1050 and can go up if a larger fan, additional suction points, or extensive piping is required.

Crawlspace venting

Sub-Membrane depressurization

A powered venting system works by removing a constant amount of air from within your crawlspace. It’s the least expensive type of system to install in a home with a crawlspace, but is not always sufficiently effective on its own. These systems typically work best in older homes with ventilated crawlspaces. Newer, tighter homes will typically require a vapor barrier. Depending on testing, a vapor barrier may need to be installed additionally. These systems are basically everything required for a vapor barrier system, without the vapor barrier. Perforated pipe is installed around the perimeter of the crawlspace and connected to an exterior radon fan to draw out gasses. A system can be installed and tested to determine if further work or adjustments will be required. An installed venting system starts at around $750

If you have a home with a crawlspace, the most effective and efficient system is a sub membrane depressurization system. There are several grades of barrier that can be used depending on the intended use and price point desired. This type of system is always going to be the most expensive, yet the most effective way of mitigating radon in a home with a crawlspace. In addition your crawlspace will become a useable storage area with a clean floor and no more funky smell. Installing the membrane requires considerably more work, and considerably more material cost compared with other systems, but they are always very effective. To have a vapor barrier system installed will start at minimum of around $1350 for an approximately 1000 square foot area, and about $400-$600 per additional 1000 square ft. ( crawlspace area ) If you have a newer home with a crawlspace that already has a vapor barrier installed, the addition of radon mitigation will be considerably less at around $750-$1200, mostly depending on the condition of the existing barrier.