*The Angi rating for Radon Detection And Reduction companies in Cos Cob, CT 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 Cos Cob, CT 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 June 09, 2026
Serving Cos Cob, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2008
Free estimates
Small jobs welcome
"I havenâ t performed my radon test yet. Hope itâ s working!!"
+1
Serving Cos Cob, CT and surrounding areas
Approved
In business since 1995
Free estimates
Credit card accepted
"The engineers who installed the radon mitigation system were knowledgeable and pleasant . They answered all of our questions patiently. They follow up and communicated with us within the year to check on the system. I recommend A & R enthusiastically."
+10
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2015
Free estimates
Warranties offered
"I highly recommend Apex Radon Solutions. From getting the estimate to getting the work done, everything was just outstanding. Marco and his crew of 3 men showed up early and were all knowledgeable and extremely skilled. I had to install a radon fan and put in piping and electrical. They measured the piping with care and accuracy and did an excellent job with the installation. Iâ m truly impressed with the professionalism and quality of the work. They were also very reasonable with their prices. Thank you Apex for such great work."
+3
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"The company provided the information I needed to know about the Radon System at no cost to me."
+3
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2025
Free estimates
Emergency services offered
I pride my company on reliability, great communication, integrity, and quality work. I am an expert in home inspections, mold testing and radon testing and remediation. I will do my absolute best to keep you as educated and informed on your particular inspection project. I look forward to earning your business! Book with me online or feel free to give me a call today! My focus is protecting your home investment.\n\nThank You,\nCharles Rauch\nOakhill Home Inspections
Serving Cos Cob, CT and surrounding areas
Approved
In business since 2020
Emergency services offered
Small jobs welcome
The Lab is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
Serving Cos Cob, CT and surrounding areas
In business since 2010
Free estimates
Emergency services offered
"Lance Dorfi was proactive, efficient, and professional. They came to every appointment on time and tailored a radon mitigation solution that reduced the levels. I would highly recommend them for radon mitigation!"
Serving Cos Cob, CT and surrounding areas
In business since 1980
Free estimates
Emergency services offered
"They were very professional. Took care of every aspect of the job. I would recommend them to anyone needing a radon system."
+5
Serving Cos Cob, CT and surrounding areas
In business since 2018
Free estimates
Warranties offered
"John M. was courteous, timely, and professional in his inspection. He was upfront about the issues -- whether they are serious or minor, rare or common, and whether more specialized input is required. His written report was very well done and will serve as a great home guide for us in the future after we move in. Thank you!"
+7
Serving Cos Cob, CT and surrounding areas
In business since 1987
Free estimates
Emergency services offered
"The company provided the information I needed to know about the Radon System at no cost to me."
+22
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 New York, NY, 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.
Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.
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.
