Cost of Radon Testing Kits
You can buy radon testing kits from laboratories, hardware stores or other retail stores that sell items related to home maintenance. Their cost varies, ranging from about $7 to $30, depending on the type of radon detector.
Types of Detectors
Radon detectors fall into one of two general categories: short-term or long-term. Short-term devices measure radon levels for two to seven days, while the long-term devices take measurements for at least three months. If either device shows a radon level higher than 4 picocuries per liter of air, you may need to take follow-up action to lower the amount of radon in your home.
Hiring a Professional
Instead of conducting your own radon inspection, you may want to hire a licensed professional to do the job. The Illinois Emergency Management Agency's Web site includes a list of trained radon inspectors in each Illinois county. The cost will vary among homes. For example, a professional radon inspection on a bi-level home with a crawl space and a slab-on-grade room will cost $150 as of 2010, according to Foresight Home Inspection LLC, a northern Illinois company.