Radon is an important issue here in Minnesota as I mentioned in my blog on the subject:http://johnchrisney.com/?p=742  The cost to install a radon mitigation system ranges between $500 to $2,000 , depending upon the home’s configuration, with a generalized average in my experience of around $1,400 or so. You can view a typical installation by clicking here.

The following is a list of radon measurement and mitigation contractors:

Quality Radon Services
Brad Nyberg
BradRadonMan@aol.com
612-521-3580

The Radon Guys
info@radonnet.com
763-416-6768
www.RadonFixed.com

SWAT Environmental
952-935-2118
www.Minnesota-Radon.com

Mateffy Engineering
Leslie H. Mateffy III
651-636-6166
les@mateffyeng.com
http://www.mateffyeng.com/services_radon.html