In this area, it is not that costly to fix. Installation of a radon system runs from $700 - $900 and they come with guarantee to reduce the levels under the EPA recommended level of 4 pCi/L.Radon is something that can be remediated and should not keep you from purchasing a home that you love.nstallation of a radon system runs from $700 - $900 and they come with guarantee to reduce the levels under the EPA recommended level of 4 pCi/L. Radon is something that can be remediated and should not keep you from purchasing a home that you love.