5 
10 *The Angi rating for Radon Detection And Reduction companies in Darien, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
*The HomeAdvisor rating for Radon Detection And Reduction companies in Darien, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Radon Detection And Reduction needs.
Last update on March 13, 2026
Serving Darien, IL and surrounding areas
In business since 1988
Free estimates
Warranties offered
"Radon levels went from about 12 to hovering between 0.4 and 0.1 after about 24 hours. Great work done quick and done well."
+4
Serving Darien, IL and surrounding areas
In business since 2014
Free estimates
Credit card accepted
"My husband and I are writing to communicate to you a very positive interaction with Mr. Tim Peiffle. His professional approach to a radon inspection, which was mandatory in the conduction of the sale of our home, displayed a knowledgeable background, as he also educated my husband and myself, as to the radon process. His service was stellar!"
+5
Serving Darien, IL and surrounding areas
In business since 2020
Free estimates
Credit card accepted
"I consulted with Radon Doctor about my home. The four foot high basement had 5 pci in a 48 hour test. The first living floor was 1.5 pci in the same test. Radon Doctor advised me to monitor radon levels on the living floor over 6 months during winter season and get back to them for mitigation if needed. They did not take advantage of a single basement reading to insist I install a system that would not affect the living floor levels. These guys are legit."
Serving Darien, IL and surrounding areas
In business since 2012
Credit card accepted
"Completely satisfied. Would certainly recommend them for Radon mitigation work. They worked efficiently, were neat and clean and the price was quite reasonable."
Serving Darien, IL and surrounding areas
In business since 1994
Emergency services offered
Credit card accepted
"Chuck was thorough, personable, and very helpful. He went above and beyond to give us helpful pointers and information that was beyond the scope of what was required for the inspection. I highly recommend his services!
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Serving Darien, IL and surrounding areas
In business since 2015
Small jobs welcome
Credit card accepted
"Technician explained everything about Radon in terms we could totally understand. He was patient, polite, totally knowledgeable and professional."
Serving Darien, IL and surrounding areas
In business since 2016
Free estimates
Emergency services offered
"Sidad was professional and he performed the radon test with state of art equipment. The radon test price was reasonable and I am happy to deal with him. I would refer to him for future test."
+16
Serving Darien, IL and surrounding areas
In business since 2008
Free estimates
Credit card accepted
"Very easy to get an appointment on short notice when I had limited time to get a radon test done in the process of purchasing a home. Their price was also slightly lower than an estimate I'd received from another company, and the technician was more thorough about explaining the process than the other company I considered."
Serving Darien, IL and surrounding areas
In business since 1996
Free estimates
Credit card accepted
"I think this guy did a good job. My In-laws thought he was a little fussy, but I'd rather have every little thing noted. I'd rather be able to decide what's important. The report was pretty concise, and the summary was pretty good as well. I recommend him."
Serving Darien, IL and surrounding areas
In business since 2008
Free estimates
Emergency services offered
"It was a nice they are thorough and I was satisfied with it."
From average costs to expert advice, get all the answers you need to get your job done.
The cost of a radon mitigation system in Chicago, IL, depends mostly on the type of system being installed. Use this guide to learn about your options.
The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.
Find out what impacts radon testing costs, including average prices for DIY kits and professional services, so you can protect your home and budget confidently.
Radon is a radioactive gas that can enter a home from the ground. Prepare yourself for mitigation by answering these questions before hiring a pro.
How does a radon mitigation system work? Learn more about how it pulls air and radon from the soil and expels it before it can enter your house.
What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.
