A house inspection is important whether you're buying or selling a home. Where does radon testing fit in to the picture? Let's look first at considerations from a house seller's perspective. If your inspector or another qualified professional has recently tested your home for radon, the client wants assurance the testing was done correctly. She may ask that testing be redone if certain conditions aren't met. Did testing adhere to the EPA radon checklist or your state's protocol? Was testing done within yesteryear couple of years? Maybe you have made any renovations on your home since testing was done? Does your prospective buyer want to call home in a basement or level less than where testing was done? She could also request a new test if your state or local government requires the disclosure of radon information to buyers and that disclosure hasn't been made. If you haven't yet had your home tested for radon, contain it done as soon as possible. Test in the