As a real estate consultant, I recommend all of my clients test for radon whether buying or selling. Many inspection companies I recommend also test for radon but with inferior technology, and they charge extra for radon testing. Total Radon Solutions takes care of all my clients' testing needs for free. They are easy to work with and scheduled around my needs and provide a professional report.
When Radon tested high on one of my own properties (9.2 to EPA recommendation of <4), I had the mitigation system installed as well. They sealed all cracks in the foundation, determined the best location for the perfect intersection of aesthetics and functionality, installed the system quickly, and retested. My 9+ level dropped to <0.2.
I will continue using and recommending Total Radon Solutions.