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Radon gas abatement pros in Katonah

Avatar for MDL Radon Mitigation and Measurement LLC

MDL Radon Mitigation and Measurement LLC

30 Route 37 South
4.95(
33
)
•Approved Pro

MDL Radon Mitigation and Measurement LLC

30 Route 37 South
4.95(
33
)
•Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
7 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Excellent service and results! Doug was very knowledgeable, very easy to talk to, very thorough and detail oriented. He made improvements to my existing system and greatly increased efficiency with immediately noticeable results. He treated my home with respect and left the work area cleaner than when he started. Very happy with the results and highly recommend!"

Al D on May 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Excellent service and results! Doug was very knowledgeable, very easy to talk to, very thorough and detail oriented. He made improvements to my existing system and greatly increased efficiency with immediately noticeable results. He treated my home with respect and left the work area cleaner than when he started. Very happy with the results and highly recommend!"

Al D on May 2025

Avatar for Lance Dorfi, LLC

Lance Dorfi, LLC

57 Westchester Avenue, Unit 207
4.82(
59
)
•Approved Pro

Lance Dorfi, LLC

57 Westchester Avenue, Unit 207
4.82(
59
)
•Approved Pro
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
39 local quotes requested

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

Avatar for Expediant Environmental Solutions, LLC

Expediant Environmental Solutions, LLC

3657 Albany Post Road
4.34(
361
)
•Approved Pro

Expediant Environmental Solutions, LLC

3657 Albany Post Road
4.34(
361
)
•Approved Pro
Customers say: True professional
293 local quotes requested
30 years of experience

Expediant Environmental is committed to excellence and continues to be an outstanding business with over 25 years of experience. Our company prides itself on an outstanding record of quality service. We specialize in your whole home as a system approach. So when it comes to mold removal, insulation, or waterproofing we never forget to make sure it does not have a negative effect on another function of your home. Wet Crawl Space? Expediant offers CleanSpace encapsulation system to control moisture and dampness in the crawl space. We are an authorized Contractor Nation installer. Radon problem? That's no problem for us. Got bed bugs or rodents? We can make them disappear! Expediant offers a wide variety of services to meet all your pest control needs from preventative maintenance to treatment of active problems. See our website! www.Expedianthomesolutions.com

"Great job, they replaced the sump pump and did a good job. "

Ramon R on September 2025

Expediant Environmental is committed to excellence and continues to be an outstanding business with over 25 years of experience. Our company prides itself on an outstanding record of quality service. We specialize in your whole home as a system approach. So when it comes to mold removal, insulation, or waterproofing we never forget to make sure it does not have a negative effect on another function of your home. Wet Crawl Space? Expediant offers CleanSpace encapsulation system to control moisture and dampness in the crawl space. We are an authorized Contractor Nation installer. Radon problem? That's no problem for us. Got bed bugs or rodents? We can make them disappear! Expediant offers a wide variety of services to meet all your pest control needs from preventative maintenance to treatment of active problems. See our website! www.Expedianthomesolutions.com

"Great job, they replaced the sump pump and did a good job. "

Ramon R on September 2025

Acceptable Environment

PO Box 10863
4.94(
126
)
•Approved Pro

Acceptable Environment

PO Box 10863
4.94(
126
)
•Approved Pro
Super Service Award
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
28 local quotes requested

With over 30 years experience, Acceptable Environment is the company you need to handle your Radon Mitigation needs. Give Acceptable Environment a call today. We look forward to working with you!

"Matt was awesome to work with! We found him after having some serious issues with another radon company. Matt was quick to respond to us and came to take a look at our system right away. After the first company we hired could not fix our radon issue (they came back again after missing a broken rubber cufflink around our fan) Matt returned and performed a thorough evaluation of our basement and current mitigation system. After only a few hours, Matt was able to find the best suction points in our basement. He took apart our system, created an additional suction point via brand new pipes, and installed a larger fan. The system ended up working flawlessly and the radon significantly decreased to normal levels within a day or so. We'd been dealing with this radon issue for months and it honestly seemed like lost cause but Matt was able to fix the issue with ease. We now have complete peace of mind and we're happy to say we can finally enjoy our basement again. Thank you Matt (and Steve!)!"

Matthew C on December 2024

With over 30 years experience, Acceptable Environment is the company you need to handle your Radon Mitigation needs. Give Acceptable Environment a call today. We look forward to working with you!

"Matt was awesome to work with! We found him after having some serious issues with another radon company. Matt was quick to respond to us and came to take a look at our system right away. After the first company we hired could not fix our radon issue (they came back again after missing a broken rubber cufflink around our fan) Matt returned and performed a thorough evaluation of our basement and current mitigation system. After only a few hours, Matt was able to find the best suction points in our basement. He took apart our system, created an additional suction point via brand new pipes, and installed a larger fan. The system ended up working flawlessly and the radon significantly decreased to normal levels within a day or so. We'd been dealing with this radon issue for months and it honestly seemed like lost cause but Matt was able to fix the issue with ease. We now have complete peace of mind and we're happy to say we can finally enjoy our basement again. Thank you Matt (and Steve!)!"

Matthew C on December 2024

Avatar for E&A HOME SOLUTIONS LLC

E&A HOME SOLUTIONS LLC

56 N Plank Rd, Ste 1 PMB 415
5.00(
4
)
•Approved Pro

E&A HOME SOLUTIONS LLC

56 N Plank Rd, Ste 1 PMB 415
5.00(
4
)
•Approved Pro
Free onsite estimate

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Edwin and Alex were both very professional. On time. Reasonable and honest ! They knew what they were doing and even showed me step by step the process of what was being done. "

David C on August 2025

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Edwin and Alex were both very professional. On time. Reasonable and honest ! They knew what they were doing and even showed me step by step the process of what was being done. "

David C on August 2025

Avatar for Enviro-watch

Enviro-watch

911 Mamaroneck Ave
5.00(
5
)
•Approved Pro

Enviro-watch

911 Mamaroneck Ave
5.00(
5
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
57 local quotes requested

Enviro-watch is a LICENSED ASBESTOS TESTING COMPANY. We perform air testing, monitoring and environmental consulting, for both residential and commercial properties, in Westchester County, NY, Putnam County, NY, Dutchess County, NY and Rockland County, NY for over 20 years.

"It went pretty well. It seem like they were very thorough and clean in their work."

debbie c on May 2019

Enviro-watch is a LICENSED ASBESTOS TESTING COMPANY. We perform air testing, monitoring and environmental consulting, for both residential and commercial properties, in Westchester County, NY, Putnam County, NY, Dutchess County, NY and Rockland County, NY for over 20 years.

"It went pretty well. It seem like they were very thorough and clean in their work."

debbie c on May 2019

Avatar for Environmental Assessments & Solutions, Inc.

Environmental Assessments & Solutions, Inc.

144 Euclid Ave
4.98(
109
)
•Approved Pro

Environmental Assessments & Solutions, Inc.

144 Euclid Ave
4.98(
109
)
•Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
138 local quotes requested

Locally owned and operated mold and indoor environmental testing and consulting services company serving NYS, CTS, and NJS since 1992. With over 31 years experience and over 50,000 inspections completed. Court qualified and experienced. Independent and Unbiased inspections with no eyes on the clock. Weekend and evening appointments at no extra charge. ANGI's super service award winner 6 years in row 2017-2022! ** We NEVER conduct abatement/remediation services*** Please CALL us for a FREE phone consultation today!

"Charles was fantastic. Would recommend!"

eddie e on April 2025

Locally owned and operated mold and indoor environmental testing and consulting services company serving NYS, CTS, and NJS since 1992. With over 31 years experience and over 50,000 inspections completed. Court qualified and experienced. Independent and Unbiased inspections with no eyes on the clock. Weekend and evening appointments at no extra charge. ANGI's super service award winner 6 years in row 2017-2022! ** We NEVER conduct abatement/remediation services*** Please CALL us for a FREE phone consultation today!

"Charles was fantastic. Would recommend!"

eddie e on April 2025

Avatar for QCC Water Damage

QCC Water Damage

Located In:
5.00(
4
)
•Approved Pro

QCC Water Damage

Located In:
5.00(
4
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
116 local quotes requested

We specialize in mold remediation, water damage restoration and sewer backup cleaning services. We pride ourselves on the quality work we provide, while delivering great customer service! Please see the services we offer below and call -- or-- click to schedule a free estimate today!

"Robert called me immediately upon request and was at my home within a few hours. He investigated the extent of the water damage, set up several fans and dehumidifiers, and within a few days my basement was dry again. Highly recommended!"

Coral E on April 2025

We specialize in mold remediation, water damage restoration and sewer backup cleaning services. We pride ourselves on the quality work we provide, while delivering great customer service! Please see the services we offer below and call -- or-- click to schedule a free estimate today!

"Robert called me immediately upon request and was at my home within a few hours. He investigated the extent of the water damage, set up several fans and dehumidifiers, and within a few days my basement was dry again. Highly recommended!"

Coral E on April 2025

Avatar for Certified Mold Removal Inc.

Certified Mold Removal Inc.

56 Churchill St
4.00(
45
)
•Approved Pro

Certified Mold Removal Inc.

56 Churchill St
4.00(
45
)
•Approved Pro
Customers say: Super punctual
369 local quotes requested
30 years of experience

Certified Mold Removal has been providing expert licensed and certified mold inspection, testing, removal and remediation services Since 1995! Not All Mold is Dangerous! Don't Let Other Companies Scare You! Call now and we can have a licensed and certified mold inspector at your home today!

"Service is good, but a little pricy"

Emily Z on July 2024

Certified Mold Removal has been providing expert licensed and certified mold inspection, testing, removal and remediation services Since 1995! Not All Mold is Dangerous! Don't Let Other Companies Scare You! Call now and we can have a licensed and certified mold inspector at your home today!

"Service is good, but a little pricy"

Emily Z on July 2024

Avatar for Mr Chimney

Mr Chimney

529 Rockland Ave
4.68(
251
)
•Approved Pro

Mr Chimney

529 Rockland Ave
4.68(
251
)
•Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
259 local quotes requested

Mr Chimney is the chimney and fireplace expert! We are a family owned business serving Westchester County, Putnam County, Bronx, NYC, Brooklyn and Fairfield County, CT. since 1969! Our services include chimney sweeping, chimney inspections, fireplace cleaning, gas and oil furnace flue cleanings, boiler flue cleanings, hot water heater flue cleanings, gas grill sales, gas grill repairs, gas fireplace repairs, gas log set sales and gas log set repairs, wood stove and gas stove cleanings, chimney repairs, chimney restorations, fireplace restorations, gas fireplace sales and installations, wood stove sales and installations, gas and wood fireplace insert sales and installations, brickwork, waterproofing, gas log set sales, chimney rebuilding, chimney flashing repair, chimney crown repair, chimney rain cap installation, chimney exhaust fan installation, cleaning pizza ovens for restaurants, lining and relining chimney flues, metal chimney installations, solving smoke problems and solving draft issues. We are licensed & insured and service both residential and commercial clients. We take pride in being well known in NY State as a safe, reliable and honest company! We are available 24 hours a day, 7 days a week!

"They make sure the area was clean, there were no dirt. when they clean chimney they made a walk link to make sure that the house wouldn't get dirty. The supervisor is very knowledgeable they explained to me what they are doing and very professional and did a good job. They made recommendation of different fireplace design if i wanted to do upgrade in the future.."

Kahiesia B on August 2022

Mr Chimney is the chimney and fireplace expert! We are a family owned business serving Westchester County, Putnam County, Bronx, NYC, Brooklyn and Fairfield County, CT. since 1969! Our services include chimney sweeping, chimney inspections, fireplace cleaning, gas and oil furnace flue cleanings, boiler flue cleanings, hot water heater flue cleanings, gas grill sales, gas grill repairs, gas fireplace repairs, gas log set sales and gas log set repairs, wood stove and gas stove cleanings, chimney repairs, chimney restorations, fireplace restorations, gas fireplace sales and installations, wood stove sales and installations, gas and wood fireplace insert sales and installations, brickwork, waterproofing, gas log set sales, chimney rebuilding, chimney flashing repair, chimney crown repair, chimney rain cap installation, chimney exhaust fan installation, cleaning pizza ovens for restaurants, lining and relining chimney flues, metal chimney installations, solving smoke problems and solving draft issues. We are licensed & insured and service both residential and commercial clients. We take pride in being well known in NY State as a safe, reliable and honest company! We are available 24 hours a day, 7 days a week!

"They make sure the area was clean, there were no dirt. when they clean chimney they made a walk link to make sure that the house wouldn't get dirty. The supervisor is very knowledgeable they explained to me what they are doing and very professional and did a good job. They made recommendation of different fireplace design if i wanted to do upgrade in the future.."

Kahiesia B on August 2022

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FAQs for radon gas abatement projects in Katonah, NY

The only way to know whether your home or water supply contains radon is to schedule a professional test. A qualified radon inspector will collect samples, deliver lab-verified results, and explain the findings for $150 to $800. Once you know your exact levels, you and your radon mitigation pro can choose the right system and tackle the problem before it affects your family’s health.

Both roles tackle radon, but they focus on different steps. Inspectors test your home, interpret the results, and determine whether levels exceed EPA guidelines. Mitigation pros design and install the system that lowers those levels. Some companies do both, but the skills and equipment differ, so always verify that the person you hire is properly certified for the specific service you need.

Installing a mitigation unit fixes radon problems by reducing indoor gas levels to established safe standards. A system designed and installed by a mitigation expert, tailored to your home's specific layout and foundation, guarantees effective radon reduction. This expert installation ensures consistent performance over time while safeguarding your indoor air quality.

Open windows and doors do not reduce radon levels because they trigger a pressure imbalance that draws radon-laden air into your home. This practice fails to control radon concentration and can even worsen the issue. An active suction mitigation system provides a proven, safe, and effective solution to reliably reduce radon levels.

Radon mitigation systems generally last between 10 and 30 years, depending on system type and maintenance. Passive systems endure the longest because they have no moving parts, whereas active systems, which use a fan, require fan replacement every 5 to 10 years. System components, such as PVC pipes, seals, and fittings, can remain effective for decades when paired with periodic inspections and proper maintenance.

Radon mitigation systems consume between 300 and 3,000 kWh of electricity per year, depending on fan size and system design. On average, an active radon fan draws 100 to 300 watts continuously, which translates to roughly 876 kWh annually, and adds $30 to $300 to your energy bill each year. Choosing a high-efficiency fan and ensuring tight sealing around pipes helps minimize these ongoing costs.

The Katonah, NY homeowners’ guide to radon gas abatements

From average costs to expert advice, get all the answers you need to get your job done.

See all articles