
Serving Princeton, NJ and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Warranties offered
"Great service. Highly recommend for your radon mitigation project"



*The Angi rating for Radon Detection And Reduction companies in Princeton, NJ 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 Princeton, NJ 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 August 04, 2025

Serving Princeton, NJ and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Warranties offered
"Great service. Highly recommend for your radon mitigation project"



Serving Princeton, NJ and surrounding areas
In business since 2014
Free estimates
Emergency services offered
"It is my absolute pleasure to write this raving review for Benedict Ugorji (the owner) at Radon Shield LLC and I make no commission recommending him. The radon level was 1.8 pCi/L when I bought my home in Holmdel, NJ, in February 2021. I wanted to lower the radon level for personal health reasons (I have a young 3 year old) not for a real estate transaction (goal level <4 pCi/L). Safe levels were established in the 1970s (The history, development and the present status of the radon measurement programme in the United States of America. Radiat Prot Dosimetry 2015; 167(1-3): 8-14) so maybe new safe levels should be lower than the current recommendation to reflect available technologies for radon mitigation as there is no safe level. I spent $700+ for a new Fantech Rn4EC-4 fan and to seal the French drain serviced through RAdata in Flanders, NJ, and the level was unchanged at 1.6 and 1.9 pCi/L after servicing. RAdata is a disorganized business that will recommend the most expensive system (the energy recovery ventilator) that costs $3000 that other radon companies (I got two second opinions) will say that it does not work. Then RAdata proposed to install a second mitigation system right next to the current system, but could not intelligently justify why the second system would be right adjacent to the current system where there is already subterranean air flow generated by the current system instead of tackling the no subterranean air flow zone at the farthest end of the basement. Please refer to my review about RAdata on Yelp and Facebook and my subsequent reply to their response for details. I kept looking for another radon company and fortunately I found a gem in the unscrupulous radon business. The gem is Benedict whom I unwaveringly and unequivocally recommend. Benedict is responsive – he patiently listened about my radon situation and collected information about my pre and post service radon level and even information down to the granular level like what make and model fan RAdata installed. Benedict came to my home for the consultation, to run the diagnostic tests, he proposed solutions and offered his rational, he did the installation of the second mitigation system (in the area of the basement with no subterranean air flow) from start to finish by himself, he used a more powerful and cheaper fan for the second system (than the one RAdata installed for my first system), and he guaranteed to lower the radon to a specified level in his contract. Benedict charges one flat service fee (whereas RAdata charges the first hour and then at 15 min increments so you are discouraged from asking questions). Benedict took his time to explain to me about how a fan’s performance (like moving air measured in cubic feet per minute or CFM) is affected by your soil’s static pressure (the value on your u-tube manometer). He even followed up with me on a Saturday via text message about the short term radon level measured with the Corentium radon detector (while the charcoal kits are being sampled) and guided me through interpreting the short versus long term average as the values were quite different. We touched based again when the charcoal test came back and the levels were an astonishing 0.5 and 0.6 pCi/L!!!"





+10

Serving Princeton, NJ and surrounding areas
In business since 2013
Free estimates
"The service was a Radon Remediation System...not listed above. Benedict and his brother were GREAT. I needed it to sell my home and they drive 90 miles and come out in just a couple days. The work involves boring through your basement floor, piping up and out of the house and up above the roof line with a fan and pressure gauge installed. I was apprehensive but trusted their "get right to it" attitude and the finished project is neat, clean and sealed in all necessary areas. Long term exposure to Radon can potentially cause cancer. The home tested as high as 5.2 (4.0 is bad) and after the system was installed another test read 0.3...virtually none. They were easy to deal with by phone, text and email and while I am unhappy that I had to spend the money, I feel it was WELL SPENT. I highly recommend them to resolve such a "mysterious " issue."





+10

Serving Princeton, NJ and surrounding areas
In business since 1984
Free estimates
Warranties offered
"Top notch company and extremely professional. They did an excellent job and worked with me on the best placement for the radon mitigation system. Perhaps the best review I could give them is to say I will be hiring them to do my own house as well as I am situated on the Reading Radon belt. The job I am rating them on was my Dadâ s house which I am selling."





+7
Serving Princeton, NJ and surrounding areas
In business since 2022
Free estimates
Warranties offered
"When my husband and I discovered we had elevated radon levels we contacted a company that our neighbors used. They made us wait 2 weeks came out and gave us a price and then said they had to â think overâ how they would install the system. Frustrated- I did a search and found Garaâ s Radon. Kevin came out right away to give a quote. He was very professional and his price was lower than the previous company. He quickly and efficiently installed our system within a few hours. What was more impressive was the results of our radon test after the installation of the mitigation system, as they dropped from 10.0 to 1.20. Thank you Kevin!"

Serving Princeton, NJ and surrounding areas
Free estimates
Emergency services offered
Credit card accepted
"Very professional! Arrived on time, was very knowledgeable, and friendly. Would use again and recommend."


Serving Princeton, NJ and surrounding areas
In business since 2020
Free estimates
Warranties offered
"Very knowledgeable. Their estimate was consistent with other vendors AND they were able to do the work right away and the results exceeded my expectations for reducing radon."





+2

Serving Princeton, NJ and surrounding areas
In business since 1987
Free estimates
Credit card accepted
"It was a terribly cold and rainy day (it had just snowed 6inches). Despite these conditions, he said he preferred to do the inspections and it proved very fruitful. He arrived at the house 30min before the inspection time and had already taken countless pics and assessed the exterior prior to our arrival. We walked around the house, checked out the roof and exteriors, gutters, etc...Spending nearly 90min just on the exterior!
We then moved inside to the basement, and once again, he walked us through every single step and provided great simple explanations to any questions we had. In total, we spent approximately 4 hrs to finish the inspection on the 3400 sq ft house.
Going back to the rain, he was dead on! We found a minor leak in one part of the roof which our Seller arranged to fix. This would never have been found on a nice, sunny day!
As promised, 2 days after the inspections, we received a very thorough report and 2 days after that (4d after inspection), the radon report.
Everything went exactly as anticipated and planned.
"





Serving Princeton, NJ and surrounding areas
In business since 2006
Emergency services offered
Credit card accepted
"It was excellent. Jamal has a lot of experience. He was wonderful. Everything was wonderful. I was happy with the quality of the job that was done."



Serving Princeton, NJ and surrounding areas
Free estimates
"I would definitely recommend this inspector again. He was extremely knowledgeable & professional.."





+7
From average costs to expert advice, get all the answers you need to get your job done.

The cost of a radon mitigation system in Philadelphia, PA, depends mostly on the type of system being installed. Use this guide to learn about your options.

The cost of a radon mitigation system depends mostly on the type of system being installed. Use this guide to learn about your options.

Get clear answers on how much radon remediation costs, including average prices, key cost factors, and tips to save money on your home’s radon mitigation.

Radon is a gas that you can't see or smell and is harmful to your health. If your home has radon, you need to know who installs radon mitigation systems.

What is radon gas? Find out what this radioactive gas is, why it is dangerous, how it gets in your home, and how to mitigate it.

What is radon testing? Radon testing measures the presence and concentration of radon gas within indoor environments. Read on to learn more.