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Top-Rated Radon detection and reduction specialists in Knoxville - Updated Nov 2026

Avatar for Avert Radon LLC
Avert Radon LLC
5.0(
5
)
Radon Gas - AbatementRadon Gas - Testing

Serving Knoxville, TN and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Avert Radon LLC , specifically Chance, recently completed radon mitigation work at my residence, installing two systems. I typically refrain from writing reviews, but felt compelled to share my experience with Avert Radon LLC . I'm extremely satisfied with the results, as the radon levels are now virtually undetectable. Chance demonstrated exceptional professionalism throughout the process. The communication was excellent, and their meticulous attention to detail was also outstanding. Furthermore, their post-installation follow-up has been consistently excellent. I highly recommend this company without reservation. They are among the best service providers I've encountered. if I could give it more than five stars, I certainly would!"
Mitigation Install
Mitigation Install
Radon Mitigation
Radon Measurement
6 neighbors recently requested a quote
Avatar for THE CRAWLSPACE KINGS, LLC
THE CRAWLSPACE KINGS, LLC
5.0(
6
)
Radon Gas - Abatement

Serving Knoxville, TN and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

Welcome to The Crawlspace Kings, your trusted experts in crawl space repair, foundation repair, mold treatment, and encapsulation. Our dedicated team provides unparalleled services in crawl space encapsulation and basement waterproofing, ensuring the structural integrity and health of your home. With a deep commitment to quality and customer satisfaction, we offer tailored solutions to protect your home from moisture, mold, and foundational issues.\n

Encapsulated Crawlspace
Basement Drainage Channel
Radon Fan
Sump Pump Install
Dehumidifier Install

+1

1 neighbors recently requested a quote
Avatar for GreenFrog LLC
GreenFrog LLC
4.2(
10
)
Radon Gas - AbatementRadon Gas - Testing

Serving Knoxville, TN and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"The service was wonderful and absolutely fabulous. They were professional and on time. They came when they said they would. I have recommended them already. Very fair price. They were really good and great"
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+2

Response time10 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Radon1
Radon1
4.6(
90
)
Radon Gas - Abatement

Serving Knoxville, TN and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"Radon One replaced our crawl space vapor barrier with a super high quality vapor barrier that should last for a very long time. The guys working on the job were polite, professional, and even installed a better product than we had ordered due to lack of supply, at no extra charge! We believe Radon One was very knowledgeable about our different options and steered us graciously toward the decision that was the best value for us, instead of trying to upsell services we did not need. Thank you!!"
Response time2 days
Response rate88%
Recommended by98%of homeowners
Avatar for Inspect the Smokies
Inspect the Smokies
5.0(
5
)
Radon Gas - AbatementRadon Gas - Testing

Serving Knoxville, TN and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"I am a homebuyer. I contacted the Inspector (Pat) through Angies list asking if he could provide me several days and times he would be available for doing a home inspection, and also for pricing. He was prompt in replying, provided both pieces of information requested, and also noted that he could do Radon inspections at a good price. His response to me was very professional and made a good impression on me."
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+61

Recommended by100%of homeowners
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Radon Detection and Reduction FAQs, answered by experts

Installation typically takes 1-2 days, depending on the system and property layout.

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

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

No level of radon is technically safe, but since it is present everywhere, complete avoidance is impossible. The average radon level in homes across the United States is 1.3 picocuries per liter (pCi/L). The Environmental Protection Agency (EPA) recommends taking preventative measures if your home's radon levels are between 2 and 4 pCi/L or higher.

Installing a mitigation system reduces radon levels, which can cause lung cancer, providing peace of mind and long-term health benefits. It can also increase your home’s value, as many buyers prefer properties with radon safety measures in place. The investment is relatively low compared to the potential health risks associated with prolonged radon exposure.

The Knoxville, TN 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.