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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

Short-term tests take 2-7 days, while long-term monitoring may require up to 90 days for accurate results.

The natural breakdown of uranium in soil, rock, and water can cause radon to appear in a home. The gas seeps into homes through cracks in foundations, walls, or floors, as well as through gaps around pipes or construction joints. Radon levels are influenced by soil composition, building materials, and ventilation. Poorly sealed or airtight homes can trap radon, allowing it to accumulate.

You can buy DIY radon test kits from a home improvement store and conduct radon testing, but these tests are often inaccurate. No matter the result, you should supplement DIY testing with professional radon detection and analysis. DIYers only have access to passive radon tests, which aren’t as reliable as active tests that professionals use. Plus, it’s very easy for DIYers to make mistakes during testing, leading to inaccurate results. If you’re moving into a new home, have concerns about radon, or are due for an updated test, hire a professional. 

Testing every 2-5 years or upon adjusting occupancy or structural changes maintains safe environments.

DIY radon detection is possible using over-the-counter test kits, but professional testing can provide more accurate assessments, especially in cases of high initial readings.

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.

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