Top-rated radon gas testers.

Get matched with top radon gas testers in Knoxville, TN

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Radon gas testers in Knoxville

Avatar for Radon Consultants of East Tennessee, LLC
Radon Consultants of East Tennessee, LLC
4.9(
19
)

Serving Knoxville, TN and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

"Ryan was the most informed and knowledgeable of the 5 companies I had estimates from. His equipment was the highest rated on consumer reports, and his workmanship and attention to detail was absolutely excellent. He went above and beyond to install the radon mitigation system so its hardly noticeable and didn't detract from the home's curb appeal. All other companies wanted to put a chimney of pipe outside along the house exterior and didn't offer to test the slab substrate underneath to determine suction ability prior to installation which insured excellent removal power. He also sealed all cracks in the basement. Everything completed in timely and professional manner and he left the site spotless on completion. As a long time Home Adviser user I highly recommend his services."
Suction Point hidden in Basement Closet
4" Radon pipe hidden in bedroom closet
Radon fan located in the attic
Radon Exhaust vent
Suction point in a finished workshop

+4

Response time11 hrs
Recommended by94%of homeowners
Avatar for Avert Radon LLC
Avert Radon LLC
5.0(
5
)

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
4 neighbors recently requested a quote
Avatar for A1 Abatement
A1 Abatement
4.8(
6
)

Serving Knoxville, TN and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

A1 Abatement is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.\n

Fresh Paint
Quick Contrast
20,000 sq ft of Abatement
Improvising!
20,000 sq ft of Abatement

+18

Response time2 days
33 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for GreenFrog LLC
GreenFrog LLC
4.2(
10
)

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"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time10 hrs
Response rate100%
9 neighbors recently requested a quote
Avatar for Inspect the Smokies
Inspect the Smokies
5.0(
5
)

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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+61

Recommended by100%of homeowners
Avatar for Covenant Air LLC
Covenant Air LLC
4.7(
27
)

Serving Knoxville, TN and surrounding areas

In business since 2010

Credit card accepted

"Overall, we were very satisfied with the knowledge and quality of work that Covenant LLC provided. We had Covenant LLC install a radon mitigation system for our basement. Initially my husband and I met with David for the estimate and consultation. David spent the time to explain how radon can get into the basement, what the system would look like, and how he was going to make sure it was working. After meeting with David at Covenant, we met with a competitor who were definitely not as knowledgeable, were not going to seal any of the cracks or holes in the foundation or even follow industry standard by venting through the roof of the house. The day of install the crew was personable and professional and if they had any questions, they asked. The 3" pipe that Covenant had to install to run through a closet and into the attic. In order to do this, they had to drill through the porcelain title floors and run through 3 shelves. They spent extra time to jig-saw cut the shelves around the pipes and they took special care not to crack any of the porcelain tiles and when finished it looked like it was built with the house. After completion, Covenant came back and tested the radon levels which were reduced to below their guarantee, which itself is orders of magnitude below the EPA limit. We were probably not the easiest clients to work with as we had Covenant move the roof penetration several times until the noise was completely unnoticeable. David was always polite and professional and he wouldn't be satisfied with the job until we were satisfied. We highly recommend Covenant Air to anyone who is considering these services."
Closet
Fan Placement
another view
Recommended by88%of homeowners
Avatar for Gibson cleaning services
Gibson cleaning services
5.0(
3
)

Serving Knoxville, TN and surrounding areas

In business since 1980

Emergency services offered

"Jim did a fantastic job on our radon mitigation system. He is extremely professional. We could not have been more pleased! I would recommend him without hesitation to anyone needing radon work.
"
Recommended by100%of homeowners
Showing 1-10 of 22
FAQs for radon gas testing projects in Knoxville, TN

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 Knoxville, TN homeowners’ guide to radon gas testings

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