Top-rated radon detection and reduction specialists.

Get matched with top radon detection and reduction specialists in Topsham, VT

Enter your zip and get matched with up to 5 pros

Need a pro for your radon detection and reduction project in Topsham, VT?

Select your specific project to find the pro for you.

Verified Reviews for Radon Detection And Reduction pros in Topsham, VT

*The Angi rating for Radon Detection And Reduction companies in Topsham, VT 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 Topsham, VT 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 January 18, 2026

Find Radon detection and reduction specialists in Topsham

Mountainvalley Building Inspections, Inc.

4.66(
22
)
•Approved Pro

Mountainvalley Building Inspections, Inc.

4.66(
22
)
•Approved Pro
Customers say: Quick response
26 years of experience
Free onsite estimate

Mountainvalley Building Inspections, Inc., has been operating in Vermont since 2000. Specializing in radon mitigation and testing, you are sure to be pleased with the service that this company provides.

"Good to deal with. Clean and efficient. Did exactly what he said with quality work."

Mark C on April 2025

Mountainvalley Building Inspections, Inc., has been operating in Vermont since 2000. Specializing in radon mitigation and testing, you are sure to be pleased with the service that this company provides.

"Good to deal with. Clean and efficient. Did exactly what he said with quality work."

Mark C on April 2025

Anderson Home Inspection, LLC

New on AngiNew on Angi
•Approved Pro

Anderson Home Inspection, LLC

New on AngiNew on Angi
•Approved Pro
12 years of experience
Free onsite estimate

We are a local home inspection company with over 20 years of experience in residential and commercial contracting and building. Our inspectors are reliable, knowledgeable, and trustworthy. We know that your home is one of your most important investments and that's why for us it's about always keeping the best interests of our clients in mind throughout each and every inspection. Call us today for scheduling!

We are a local home inspection company with over 20 years of experience in residential and commercial contracting and building. Our inspectors are reliable, knowledgeable, and trustworthy. We know that your home is one of your most important investments and that's why for us it's about always keeping the best interests of our clients in mind throughout each and every inspection. Call us today for scheduling!

Avatar for Environmental Testing & Research Laboratories, Inc

Environmental Testing & Research Laboratories, Inc

4.85(
347
)

Environmental Testing & Research Laboratories, Inc

4.85(
347
)
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

Avatar for Seacoast Inspections LLC

Seacoast Inspections LLC

4.93(
71
)

Seacoast Inspections LLC

4.93(
71
)
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Licensed Home Inspector #698 MA, #107 NH ASHI Certified Inspector #247162, Certified Level II Building Science Thermographer #31162, EDR Certified, Certified WDI Registry Inspector #90113. No Fee guarantee!

Licensed Home Inspector #698 MA, #107 NH ASHI Certified Inspector #247162, Certified Level II Building Science Thermographer #31162, EDR Certified, Certified WDI Registry Inspector #90113. No Fee guarantee!

Radon Detection and Reduction questions, answered by experts

What is radon? It’s a radioactive gas that naturally occurs in the ground, forming as uranium and thorium decay. It has no color or odor, so you don’t know if it’s seeping into your building’s foundation. Regular exposure to radon gas increases your chances of suffering from lung cancer. Radon testing measures the air inside your house for the presence of radon gas. If detected, the test will measure the severity of radon levels in your home’s air.

You'll need to test your home for radon after installing the mitigation system, then again every two years. If radon remains elevated, contact a licensed radon professional, either the contractor who installed the system or a different one, and have them evaluate the system. They may need to make some changes to improve its effectiveness and performance.

No level of radon is technically safe, but because it’s everywhere—even in the air outside—it’s impossible to avoid entirely. Instead, the Environmental Protection Agency encourages taking preventative measures if the levels of radon in your home rise above 2 pCi/L. (For reference, the average radon level in homes across the United States is 1.3 pCi/L.

Using an air purifier in your home or basement isn't an effective way to reduce or mitigate radon. Radon is an inert gas, meaning it doesn't react with other chemicals and can't be filtered the way particulates can be. While an air purifier can help improve your indoor air quality in other ways, don't rely on it to reduce radon.

Properties should ideally be tested for radon every 2 to 5 years or sooner when changes to the property structure or ventilation occur that might impact airflow.

The Topsham, VT 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.

See all articles

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"