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

Avatar for In and Out Home Inspections, LLC
In and Out Home Inspections, LLC
4.8(
90
)
Radon Gas - Testing

Serving Greenville, DE and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"Very thorough and quick to respond. His report gave me the justification to request $9,200 in repairs from the seller which he agreed to complete."
Response time7 hrs
44 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Mid Atlantic
Mid Atlantic
4.9(
18
)
Radon Gas - Testing

Serving Greenville, DE and surrounding areas

In business since 1985

Free estimates

Emergency services offered

"Chris Barcikowski was on time, cordial, professional and spent a reasonable time checking our home issues. He provided us with recommendations on the action to take to solve the water standing inside the air ducts. He did testing for possible mold conditions and siad the results should be ready for us by this Friday, 9/12.."
Crawl Space
Crawl Space
Crawl Space
Crawl Space
Recommended by100%of homeowners
Avatar for EcoTech Restoration Solutions
EcoTech Restoration Solutions
4.6(
27
)
Radon Gas - AbatementRadon Gas - Testing

Serving Greenville, DE and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"I could not be happier with this company. They did the work right away, even working on the weekends. They were very knowledgeable about what needed to be done and how to get the debris tested they have been very responsive. They have continued to be helpful to me in dealing with the company that left the silica dust in my home. You will not be disappointed if you use this company. I have never seen a company that is so attentive to your needs.
"
New Hope Project
Recommended by91%of homeowners
Avatar for Flood Crew LLC
Flood Crew LLC
4.6(
40
)
Radon Gas - AbatementRadon Gas - Testing

Serving Greenville, DE and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"I had a pipe burst in the basement of our rental property, Flood Crew was referred by our realtor. They arrived quickly after the pipe was fixed by our plumber, demoed, and dried out the areas, even handled packing out our furniture and placing carefully in a pod storage while the work was being done. They did mold testing and made sure everything was safe, the best part was that they dealt with the insurance and we didn’t have to do anything."
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 FAQs, answered by experts

Radon detection is crucial as prolonged exposure to radon gas, a leading cause of lung cancer, poses significant health risks in residential environments.

The fan that pulls the radon out of the air needs to run continuously, so you may see an increase in your electric bill once you install the mitigation system. Additionally, you may see an increase in your heating or cooling bills, as the fan can cause some loss of hot or cool air.

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

Radon is the number one non-smoking cause of lung cancer in the United States, but it can cause some other concerning side effects in the meantime. If you have a raspy voice, chest pains, trouble breathing, difficulty swallowing, or any of the above, don’t hesitate to perform radon testing and install a mitigation system as soon as possible.

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 Greenville, DE 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.