How to Use the Radon Testing & Mitigation Cost Calculator
Radon is a colorless, odorless radioactive gas that seeps up naturally from soil and rock into homes, and long-term exposure to high levels is linked to lung health risks — which is why testing has become a common step for both new construction and existing homes. This calculator takes your test type, whether mitigation is needed, and your home's size to instantly show the testing cost, the mitigation install cost, and the combined total so you can plan ahead.
A short-term test runs for 2-7 days and gives you a quick, lower-cost reading, though results can shift with season and ventilation. A long-term test runs 90 days or more and gets closer to a true year-round average, giving you a more reliable basis for a decision. When results come back at or above the EPA's recommended action level, the standard response is installing a sub-slab depressurization system — a pipe and fan setup that vents radon from beneath the foundation to the outside.
Mitigation install cost varies significantly with your home's foundation type and size, so treat this figure as a planning estimate rather than a firm quote, and get an on-site estimate from a certified radon mitigation contractor before committing. The FAQ below covers the difference between test types and when mitigation is actually recommended.
Frequently Asked Questions
A short-term test runs 2-7 days and gives you a quick reading. A long-term test runs 90 days or more, capturing seasonal changes for a more accurate year-round average.
The EPA recommends mitigation when a test result is at or above 4 pCi/L. Below that level, improved ventilation is often enough to manage radon on its own.