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*The Angi rating for Radon Detection And Reduction companies in Unionville, VA 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 Unionville, VA 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 July 11, 2026

Find Radon detection and reduction specialists in Unionville

Avatar for TOPS RADON
TOPS RADON
5.0(
8
)
Radon Gas - AbatementRadon Gas - Testing

Serving Unionville, VA and surrounding areas

Approved

In business since 2025

Free estimates

Offers commercial services

"Ben, I can’t thank you enough. You take pride in your work and I respect that. You worked so hard and payed attention to the smallest of details. The results speak for themselves. If you are looking for a radon mitigation system, look no further than Tops Radon. First class service from beginning to end. I cannot recommend Ben enough. God bless you Ben."
External fan
Mitigation system
Mitigation system
Mitigation system
Response time6 hrs
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Avatar for SWAT Environmental, Inc.
SWAT Environmental, Inc.
4.4(
77
)
Radon Gas - Abatement

Serving Unionville, VA and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"Ben was on-time, efficient, professional, courteous, and informative. I recommend that you specify him for your radon mitigation job."
Recommended by91%of homeowners
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Avatar for Flood Crew LLC
Flood Crew LLC
4.6(
40
)
Radon Gas - AbatementRadon Gas - Testing

Serving Unionville, VA and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"I am very pleased with the quality work and how quickly my water damage issue resolved. They were extremely professional and knowledgeable and did a great job at keeping me up to date on the progress of the cleanup."
After carpets were cleaned.
Before and after of Medallion
After color sealed
Apartment carpet cleaning
Drying bathroom wood subfloor from kitchen using indirect control heat, controlled by thermostat we set in place

+57

Recommended by88%of homeowners
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Radon Detection and Reduction questions, answered by experts

The cost to replace a radon fan ranges from $300 to $600 for the fan itself, with installation adding an additional $200 to $500. Overall, the total cost for replacement can range from $500 to $1,100, depending on factors such as the fan model, home size, and local labor rates. If the fan is part of a larger radon mitigation system, the price may be higher.

While DIY testing is possible, abatement generally requires professional installation to ensure efficacy and meet safety standards.

If high radon levels are detected, steps include sealing entry points, installing a mitigation system, and retesting the air regularly to ensure reduced levels.

Yes, many systems include warranties for performance. Confirm terms with your installer.

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.

The Unionville, VA 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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