Before you put your house on the market, getting a radon test is a smart move since high levels can scare off buyers or cause deal negotiations. The test itself is simple: you set a small detector in the lowest lived-in level for a few days, then send it to a lab. Knowing the results gives you a clear picture, so you can either fix the problem upfront or disclose it honestly, keeping the sale smooth and avoiding surprises. radon test for home sale 8