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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 time2 days
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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

Long-term exposure increases lung cancer risks. Prolonged homestay individuals and smokers encounter heightened vulnerability and exposure concerns.

Ideally, no one will live in a house with elevated radon levels, as prolonged exposure increases the risk of serious health issues like lung cancer. However, homes with radon can be made safe through mitigation systems, such as active soil depressurization. Testing for radon regularly and addressing high levels helps ensure a safe living environment.

Your radon fan needs to operate 24/7 to be effective. The only time the fan isn't operating is during its replacement. Radon levels in the home can increase within hours if the fan stops working or something obstructs the stack vent. Fortunately, radon systems require no downtime maintenance between fan changes.

The cost for a radon mitigation system typically ranges from $800 to $1,500, with an average around $1,000. The final price depends on several factors, including the size of your home, the severity of the radon issue, and the type of system required. Your home's foundation type also significantly impacts the cost. For example, sealing and ventilating an unfinished basement might cost around $4,600, while encapsulating a crawl space without a foundation slab can range from $1,500 to $15,000.

Keeping radon from getting into your home is much better than having to get rid of it once it's already indoors. While there may not be a way to fully prevent radon from getting into your home, there are things you can do to reduce the gas's ability to enter. 

Sealing foundation cracks and openings can help keep the gas from seeping inside. Improving air flow, such as by opening windows, can also be helpful. If you're building your home from scratch, talk to your contractor about using radon-resistant construction to keep the gas out.

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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