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.