
Serving Thornton, IL and surrounding areas
Approved
In business since 1957
Free estimates
Warranties offered
"as above. spent over an hour inspecting and testing"





*The Angi rating for Radon Detection And Reduction companies in Thornton, 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 Thornton, 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 April 23, 2026

Serving Thornton, IL and surrounding areas
Approved
In business since 1957
Free estimates
Warranties offered
"as above. spent over an hour inspecting and testing"





Serving Thornton, IL and surrounding areas
In business since 2012
Credit card accepted
"Jose Rodriguez was prompt, professional, and fast with results. He was there when he said he would, went there the next day after I called, and provided the results on time. As a real estate professional I know I'll need the services again and I know that he is the person I will be calling. Thank you!"
Serving Thornton, IL and surrounding areas
In business since 1994
Emergency services offered
Credit card accepted
"He was very good! He discussed with the seller all of what he found in his inspection and was very professional. I will highly recommend him. He's a great guy!"

Serving Thornton, 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 Thornton, IL and surrounding areas
In business since 2005
Free estimates
Warranties offered
"They came in, were clean and efficent. Radon mitigation down to .3 levels. Wonderful work."



Serving Thornton, 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 Thornton, IL and surrounding areas
In business since 1996
Free estimates
Credit card accepted
"West Suburban Inspections Inc
West Suburban Inspections, very thorough, and did a good job.
He explained everything in simple terms."




Serving Thornton, IL and surrounding areas
In business since 1997
Free estimates
Emergency services offered
"Everything went well & according to the EPA standards."

Serving Thornton, IL and surrounding areas
In business since 2008
Free estimates
Credit card accepted
"The estimator examined the basement walls and identified four cracks through which water might be coming in and gave a quote. We agreed to have the work done. One service man came and filled the cracks in less than the estimated time. The work involved surface patching the cracks on the inside of the wall, drilling approximately six holes through each crack and injecting a sealant into each crack. Since we haven't had a hard rain since then, we haven't had a real test of whether it holds water out.
"





+6

Serving Thornton, IL and surrounding areas
In business since 2013
Free estimates
Credit card accepted
"This company understands customer service. My call was returned immediately and was able to have someone out to issue a quote within days of contact. We received a quote and had the work done within a week. We have had all the big name companies out to give us quotes and High Tech Waterproofing provided a better option. Their quote was more cost effective, involved no hazardous fumes, no stud removal (that others had requested), and still included a warranty. I am thankful thankful that I ran across their review on Angie's List. We've yet to have spring rains to test the job done, but I feel very comfortable with our choice. I would recommend this company to any one.
"





+1
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 gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.

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.

What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.