how much does a radon system cost to run
5. The average cost of a radon system is between $800 â $1200. Homes with a crawl space, no gravel under the slab, or a completely finished lower level, sometimes cost more.return to the top.. The average cost of a radon system is between $800 â $1200. Homes with a crawl space, no gravel under the slab, or a completely finished lower level, sometimes cost more.