The average cost of a radon reduction system is between $800 and $1,200, according to RadonRepair.com. However, the cost may be higher for homes with a crawl space, no gravel under the slab or a completely finished lower level.
The National Radon Program Services similarly reports that radon reduction systems cost on average $1,200, with individual costs ranging from $800 to $1,500 depending on market conditions, as well as the house itself. The home's design, size, foundation, construction materials and local climate may affect the cost. The total mitigation cost may also vary depending on the material that is required to cover the system and uphold the aesthetic value of the home, as well as any heating or cooling costs associated with the system.