Radon Mitigation Costs: What to Expect

Radon is a naturally occurring radioactive gas that can seep into homes through cracks in floors and gaps in foundations. When testing shows elevated levels, homeowners often turn to radon mitigation—most commonly a sub-slab depressurization system—to reduce indoor exposure. While prices differ by region and site conditions, there are clear factors that shape the final bill.

In general, the largest portion of radon mitigation cost is the installation of a ventilation system tailored to the home. Many contractors charge for diagnosis and engineering decisions on top of labor and materials, and the total can range from a few thousand dollars in simpler houses to higher amounts where multiple suction points, extensive sealing, or complex routing is needed.