
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
"My home was recently tested for radon, and needed remediation. I'm glad I gave Radon Shield a call! Benedict was able to come by within the week to take a look. He walked me through the challenges, and we were able to figure out where to put the system in a manner that followed regulations and was still fairly unobtrusive. He had given me an estimate over the phone, so there were no surprises when the time came. They installed the system on the spot. My large and cluttered basement wasn't the easiest to work with, but Benedict and his team were able to handle it professionally and cleanly in the span of about 5 hours. With the system they installed, they brought the radon level down from 5.6 to 0.8. I wish I had tested for radon again a few years ago and installed this system sooner. I think they even left the basement cleaner than when they started! Thanks again!"





+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
"Peter came to my house to do a full home inspection and a radon test of my three family home. He actually arrived a few minutes before I did. I gave him some background on the property and outlined for me what areas are included in the inspection and then he got to work. The inspection took around three hours. Peter took a lot of photos which was great. I have a flat roof and this is a pretty high building and I refuse to go up there. So his photos really came in handy for me. And I also have an attic area that I could not walk into, so having the pictures are very helpful in this instance as well.
He is also very knowledgeable and informed on every area that he covered and he does not mind being interrupted with questions. He gave me a lot of great suggestions and really helped me to understand clearly and simply what areas I should pay close attention to and address. He takes his time and always wants to know if you have questions about anything. I highly recommend Peter.
Thanks again Peter for your review of my property. The report is well written, detailed and will be very helpful in addressing items that need my immediate attention.
Donna Harris
"





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
"Very professional. Definitely recommend them to a friend. Very educated and fair prices. My experience with the company and the technician were very professional."





+7
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