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Find Radon gas testers in Ashburn

Dragon Ridge Home Inspections
5.0(
8
)
Radon Gas - Testing

Serving Ashburn, VA and surrounding areas

In business since 2003

Free estimates

Credit card accepted

"JT of Dragon Ridge performed a Home Inspection and Radon Testing of a SFH in Fairfax, VA. JT arrived before I did, and was already examining the exterior of the property. While we waiting for my realtor to arrive, he grabbed a ladder and did a complete inspection of the roof (not all inspectors do this). Once we got inside, he explained the processes and we began. I shadowed him throughout the whole processes, and it was a wonderful experience. He was very thorough and knowledgeable, and was always willing to provide complete and educational answers about both the good and the bad he found. We got the report later that evening, and it was well written, with plenty of pictures of any deficiencies. He also performed a Radon test, and reported the results a few days later. I spoke to him over the phone about the findings, and he was able to discuss in detail the methodology he used, and the meanings of the testing numbers. Overall, I would highly recommend JT and Dragon Ridge."
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Recommended by100%of homeowners
Avatar for Water Damage America
Water Damage America
5.0(
100
)
Radon Gas - Testing

Serving Ashburn, VA and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"They did a great job. I'm very happy. The staff was very friendly and they kept me informed of everything they did. I was very upset when I notice water damage in my home. I didn't know what to do. I called my insurance agent and they told me to call a water damage company. After reviewing my options I decided to call 3 companies to get quotes. Water Damage America Inc's project manager explained me in detail what was going to be done in my house and give me a estimate. They weren't the cheapest but they were the most professional when coming and give me the estimate. I am glad that I choose Water Damage America Inc to do the job."
Recommended by98%of homeowners
Avatar for CSI Home and Commercial Services
CSI Home and Commercial Services
4.6(
80
)
Radon Gas - Testing

Serving Ashburn, VA and surrounding areas

In business since 1995

Free estimates

Credit card accepted

"You certainly get what you pay for! While CSI wasn't the cheapest on our list of home inspection and radon testing quotes, the cost was more than reasonable for the level of service that we received. Ron, our home inspector, was fantastic! He arrived early, and I don't think he could have been more thorough than he was! He was very friendly and personable, and was more than willing to answer our questions during the inspection. He went through the entire home with a fine toothed comb! He pointed out defects that he found, and explained things in detail. He also highlighted the positive things he found. Used a drone to inspect the roof and chimney, and thermal imaging to check for hidden moisture. I feel like we have an excellent idea of the condition of the property we are buying, which has done a lot in making us feel more comfortable! The report we receiced within 24 hours was professional and clearly written with appropriate photos attached. Will certainly recommend to others, and will use them for any future home inspection needs we have!"
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+5

Recommended by97%of homeowners
Avatar for Valley Radon Solutions, LLC
Valley Radon Solutions, LLC
5.0(
1
)
Radon Gas - Testing

Serving Ashburn, VA and surrounding areas

In business since 2021

Free estimates

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. Valley Radon Solutions, LLC strives to maintain our reputation as a high quality, very service oriented company with our main focus being on customer satisfaction.

Radon Mitigation System
Radon Mitigation System
Recommended by100%of homeowners
Avatar for Floodbusters Inc
Floodbusters Inc
4.4(
38
)
Radon Gas - Testing

Serving Ashburn, VA and surrounding areas

In business since 1988

Free estimates

Emergency services offered

"The service was excellent, as usual. I've used this company once in the past. I especially like Wanda who helps answer the phones for the company, she is very pleasant. Two technician's came out. They had to cut out drywall, and cut a 2x4 to access the crack. They then sealed the crack with two different types of materials. One was Teflon over top of the epoxy they used. They also went a step above and sealed the outside crack for me as well. This company is 10/10."
Finished Base Board System
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Recommended by81%of homeowners
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FAQs for radon gas testing projects in Ashburn, VA

Radon is the second leading cause of lung cancer in the U.S. The gas seeps through cracks in foundations and collects in basements and other low areas. Once you breathe it in, radioactive particles lodge in lung tissue and do long-term damage. Because you can’t see or smell radon, the EPA recommends testing your home every two years—and after major renovations—to keep your family safe.

Yes—every home should be tested. The EPA advises doing it at least every two years and any time you remodel, buy, or sell. On average, one in 15 houses nationwide sits above the recommended limit, and the only way to know where yours stands is a formal test. The equipment simply measures gas levels and won’t change your indoor environment, so the process is completely harmless.

Certified radon professionals—often home inspectors or dedicated radon mitigation contractors—handle testing. These radon testing professionals follow EPA protocols and use calibrated instruments to check levels throughout your house. Hiring a certified radon specialist means results you can trust for real estate deals, insurance requirements, and, most importantly, your family’s health.

Inspectors specialize in measuring radon gas levels, while licensed mitigation contractors design and install the systems that remove it. If your test comes back high, your inspector can point you to a qualified mitigation pro who will size and install the right fan, piping, or other equipment to bring levels down.

No—standard home air purifiers don’t touch radon. They’re built to trap dust and pollen, not radioactive gas. If testing shows high levels, you’ll need a dedicated mitigation system that vents the gas from beneath your home to the outdoors. Relying on a room purifier alone won’t keep your indoor air safe.

Opening a few windows in your home might dilute radon for a short time, but the gas seeps back in as soon as they’re closed. For a lasting fix, you’ll need a professional mitigation system—often a sub-slab depressurization fan—that pulls radon from beneath the foundation and safely vents it outside.

The Ashburn, VA homeowners’ guide to radon gas testings

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