
Get matched with top radon detection and reduction specialists in Cos Cob, CT
There are 5 highly-rated local radon detection and reduction specialists.
Need a pro for your radon detection and reduction project in Cos Cob, CT?
Verified Reviews for Radon Detection And Reduction pros in Cos Cob, CT
*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 December 04, 2025
Find Radon detection and reduction specialists in Cos Cob

The Lab
The Lab
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.
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.

Apex Radon Solutions LLC
Apex Radon Solutions LLC
At Apex Radon Solutions , our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.
"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."
Susan L on December 2023
At Apex Radon Solutions , our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.
"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."
Susan L on December 2023

Lance Dorfi, LLC
Lance Dorfi, LLC
At Lance Dorfi, LLC, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next home improvement project, no matter how small or large the project. We welcome your questions and thank you for your interest.
"They did a great job"
Robert G on May 2025
At Lance Dorfi, LLC, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next home improvement project, no matter how small or large the project. We welcome your questions and thank you for your interest.
"They did a great job"
Robert G on May 2025

Water Fire Fix, LLC
Water Fire Fix, LLC
Our family owned business provides professional, eco-friendly cleanup and restoration services throughout Connecticut. We specialize in residential and commercial damage due to water, fire, mold, and natural disaster.
"Tim was wonderful. I put in this project on a Saturday night after finding mold behind a piece of furniture in my finished basement. The next morning Tim already reached out looking to set up an appointment Monday morning. Over the phone he explained the possible process of this project and put me in the books first thing Monday morning. He arrived right on time, looked at the area, and again explained everything. After about 15 minutes of doing his inspection, Tim gave me two estimates, which were both fairly priced. I selected the estimate that worked best for me, and Tim got working right away. Throughout the project, he continued to update me with what he was doing and what he had left. From when Tim arrived to when he left, it took him roughly 3.5 hours for the whole project. He did an excellent job, and I would recommend him to anyone."
Alli K on April 2025
Our family owned business provides professional, eco-friendly cleanup and restoration services throughout Connecticut. We specialize in residential and commercial damage due to water, fire, mold, and natural disaster.
"Tim was wonderful. I put in this project on a Saturday night after finding mold behind a piece of furniture in my finished basement. The next morning Tim already reached out looking to set up an appointment Monday morning. Over the phone he explained the possible process of this project and put me in the books first thing Monday morning. He arrived right on time, looked at the area, and again explained everything. After about 15 minutes of doing his inspection, Tim gave me two estimates, which were both fairly priced. I selected the estimate that worked best for me, and Tim got working right away. Throughout the project, he continued to update me with what he was doing and what he had left. From when Tim arrived to when he left, it took him roughly 3.5 hours for the whole project. He did an excellent job, and I would recommend him to anyone."
Alli K on April 2025
Oakhill Home Inspections
Oakhill Home Inspections
I pride my company on reliability, great communication, integrity, and quality work. I am an expert in home inspections and 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. Thank You, Charles Rauch Oakhill Home Inspections
"good job"
Mike R on November 2025
I pride my company on reliability, great communication, integrity, and quality work. I am an expert in home inspections and 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. Thank You, Charles Rauch Oakhill Home Inspections
"good job"
Mike R on November 2025
Procyon
Procyon
We can offer Mold Testing and Remediation. Water Damage. Smoke Damage. Fire Damage. Our owner is on site for all jobs! Call today we work flawlessly with your insurance company.
"I had a poor experience. I hired this company to do a mold assessment in my apartment. I dealt with the owner. First, he requested cash or check payment only. He made an appointment and did not show up or contact me. I had to call him. In one of the rooms, the pipes above and whatever else the cause of the leak was, had been leaking repeatedly for 40 years, and the plaster constantly replaced. I was worried about mold ABOVE the ceiling on the beams and studs and not just the visible mold on the ceiling plaster and I worried it could be black mold. He did not seem to listen to what I told him and he did not use a water meter to check for saturation or a borescope or any other tools except taking a surface sample and air sample (the borescope and water meter I did not know about until after I had paid him for this inadequate job). He did not mention anything I said in the report. He was also rude and unkind and never provided me with a receipt. "
Ellen L on December 2025
We can offer Mold Testing and Remediation. Water Damage. Smoke Damage. Fire Damage. Our owner is on site for all jobs! Call today we work flawlessly with your insurance company.
"I had a poor experience. I hired this company to do a mold assessment in my apartment. I dealt with the owner. First, he requested cash or check payment only. He made an appointment and did not show up or contact me. I had to call him. In one of the rooms, the pipes above and whatever else the cause of the leak was, had been leaking repeatedly for 40 years, and the plaster constantly replaced. I was worried about mold ABOVE the ceiling on the beams and studs and not just the visible mold on the ceiling plaster and I worried it could be black mold. He did not seem to listen to what I told him and he did not use a water meter to check for saturation or a borescope or any other tools except taking a surface sample and air sample (the borescope and water meter I did not know about until after I had paid him for this inadequate job). He did not mention anything I said in the report. He was also rude and unkind and never provided me with a receipt. "
Ellen L on December 2025

ALL PRO CLEANING & RESTORATION SERVICES
ALL PRO CLEANING & RESTORATION SERVICES
When disaster strikes, All Pro is waiting 24 hours a day, 7 days a week, 365 days a year. Regardless of the magnitude of damage, All Pro’s experienced technicians are capable of assisting you and your client in managing the disaster crisis. All Pro works closely with you and your client at every phase: Consultation—A technical specialist examines and evaluates the disaster. Evaluation—The disaster site is secured, and service methodologies and timelines are developed and submitted to you and your client. Education—Technical specialists review coverage and educate the insured on the restoration process, while easing their minds about the disaster. Quality Checks and Service—Work is processed, secured, and stored at All Pro’s facility. A checklist of all work is reviewed and inspected prior to final quality sign-off from the managing principal. Follow-up—A technical specialist calls you and your clients to ensure that work has been satisfactorily completed.
"Very good and excellent service."
Joseph C on May 2022
When disaster strikes, All Pro is waiting 24 hours a day, 7 days a week, 365 days a year. Regardless of the magnitude of damage, All Pro’s experienced technicians are capable of assisting you and your client in managing the disaster crisis. All Pro works closely with you and your client at every phase: Consultation—A technical specialist examines and evaluates the disaster. Evaluation—The disaster site is secured, and service methodologies and timelines are developed and submitted to you and your client. Education—Technical specialists review coverage and educate the insured on the restoration process, while easing their minds about the disaster. Quality Checks and Service—Work is processed, secured, and stored at All Pro’s facility. A checklist of all work is reviewed and inspected prior to final quality sign-off from the managing principal. Follow-up—A technical specialist calls you and your clients to ensure that work has been satisfactorily completed.
"Very good and excellent service."
Joseph C on May 2022

Safe Zone Abatement Construction
Safe Zone Abatement Construction
Safe Zone Abatement Construction invites you to experience prompt service and superior attention to detail. We have 25+ 5-star Google reviews and service the entire state of Connecticut. Customer satisfaction is our top priority. You can be assured you're in good hands with our company working on your project. Call us today for a free estimate. You'll be pleased you did.
Safe Zone Abatement Construction invites you to experience prompt service and superior attention to detail. We have 25+ 5-star Google reviews and service the entire state of Connecticut. Customer satisfaction is our top priority. You can be assured you're in good hands with our company working on your project. Call us today for a free estimate. You'll be pleased you did.
Valentino Home Inspections
Valentino Home Inspections
Professional Home Inspection Services In New York and Connecticut Buying or selling a home can be intimidating, but when you partner with Valentino Home Inspections, it does not have to be. Let me help you understand the condition of your property and give you the confidence to make an unbiased and informed decision on your valuable investments.
Professional Home Inspection Services In New York and Connecticut Buying or selling a home can be intimidating, but when you partner with Valentino Home Inspections, it does not have to be. Let me help you understand the condition of your property and give you the confidence to make an unbiased and informed decision on your valuable investments.

All Vac Environmental, Inc.
All Vac Environmental, Inc.
All Vac Environmental, Inc. is a New York State and US EPA licensed mold remediation, asbestos abatement, lead abatement and hazard reduction, and mechanical hygiene (duct cleaning) contractor serving New York, New Jersey, and Connecticut homeowners, businesses, institutions, and contractor clients since 2003, with Dean Small serving as the company’s Principal and Senior Project Manager. Clients hire and recommend All Vac Environmental, Inc. because of our unique client-focused approached to solving environment hazards and conditions. We take the time to understand our clients' needs and project goals, which leads to increased property value, public health, and regulatory compliance. No matter your needs, our technicians and supervisors have the expertise and deep industry knowledge to give you a healthier home and workspace.
"This company was extremely knowledgeable and efficient. They kept in contact with updates and finished the job in a professional and timely manner. I was very pleased."
Fritz D on May 2021
All Vac Environmental, Inc. is a New York State and US EPA licensed mold remediation, asbestos abatement, lead abatement and hazard reduction, and mechanical hygiene (duct cleaning) contractor serving New York, New Jersey, and Connecticut homeowners, businesses, institutions, and contractor clients since 2003, with Dean Small serving as the company’s Principal and Senior Project Manager. Clients hire and recommend All Vac Environmental, Inc. because of our unique client-focused approached to solving environment hazards and conditions. We take the time to understand our clients' needs and project goals, which leads to increased property value, public health, and regulatory compliance. No matter your needs, our technicians and supervisors have the expertise and deep industry knowledge to give you a healthier home and workspace.
"This company was extremely knowledgeable and efficient. They kept in contact with updates and finished the job in a professional and timely manner. I was very pleased."
Fritz D on May 2021
The Cos Cob, CT homeowners’ guide to radon detection and reduction services
From average costs to expert advice, get all the answers you need to get your job done.
•Discover the average indoor air quality testing cost, what impacts pricing, and how to budget for healthier air in your home.
•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.

Want to learn how to master DIY radon mitigation? We have a step-by-step guide on how to complete this challenging project on your own.
•Find out the average cost of radon fan replacement, key price factors, and ways to save. Get expert tips to budget for your radon mitigation system.

You need to protect your home from radon, but what does a radon mitigation system look like? Check out this radon mitigation system diagram to learn how it works.

How long does a radon mitigation system last? A properly installed and maintained system can last 20 years or more, but various issues can reduce the life span.
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