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The cost of a radon mitigation system varies based on home size, design, and geographic location. On average, in the Greater Milwaukee area, a typical sub-slab depressurization system will cost about $1,500 from start to finish (possibly a little more or a little less depending on the homes construction, how difficult pipe routing or running electrical can be and how high the homes initial radon levels are). It is also important to note the residual cost of radon mitigation. That is, the cost of operating the system year over year in perpetuity. Working with a qualified contractor is extremely important when it comes to this factor because while one contractor may save you a few hundred dollars on the initial expense of installation, that same contractor may also use an incorrect fan or fail to seal important cracks in the foundation, ultimately leading to a much higher energy penalty year over year. While the initial expense of installing the radon mitigation system is critical, the residual expense of operating the system is equally as important and should be highly considered in the decision making process of choosing a radon mitigation contractor. Lastly, beyond reducing radon levels, these systems can also decrease moisture and other soil gases, potentially improving overall indoor air quality. In fact, some radon mitigation systems can reduce anywhere from 2-4 tons of moisture annually from entering the home. This moisture reduction can greatly improve that dank, damp basement smell in certain properties. Moreover, while radon is an important risk to mitigate, VOC’s and other hazardous soil gasses may also be present beneath the slab. If present, these other soil gases are typically also addressed, or at least greatly reduced, during the radon mitigation process.