Verified record
Radon Systems LLC works out of Sutton and does one thing: getting radon out of Massachusetts homes, in the air and in well water. It also trades as Radon Guys, and reviewers and Reddit commenters use both names for the same crew. Most homeowners land here after a failed test during a house sale, and the reviews read like people who had a number, called, and watched the number drop. The track record is deep for a single trade - 219 reviews from 2021 to 2026 across seven sources, with Google publishing 5.0 stars from 276 ratings and Angi and HomeAdvisor both at 4.9 from 203. The Better Business Bureau grades the business A+ and lists it as accredited since the end of 2018. What makes the praise usable is that reviewers keep quoting readings instead of adjectives: 10.1 pCi/L down to 0.4, 21 down to under 1, 4.5 down to 0.7, and an 1890 house with three different basement floor levels brought under control. The owner, John Spokis, is named again and again, along with technicians Dave, Derek, Josh and Nicholas, and several reviewers describe him finding a less intrusive route for the pipe or folding a sump pump replacement into the same visit. Redditors have been recommending the company since 2022 - one naming it plainly as radon systems llc in Sutton and praising clean work and fair pricing, another putting the cost at about a thousand dollars a system, and a third describing a Radon Guys re-tooling of a dead system for $650. The counterweight is also on Reddit: a 2025 commenter said this company's quote was high and that they went with theradoncompany.com instead for $1,150, and a 2026 one-star Google reviewer said a quoted replacement expansion tank came in at more than double the market price. Pricing is where the record splits, so get an itemised quote and compare it. One structural thing to know before booking: in March 2025 Protect Environmental, a national radon firm, announced it had acquired Radon Systems LLC along with Cliff Cummings Water Services. Ask who now holds the workmanship and radon-level guarantee, and get the guaranteed post-mitigation level in writing - reviewers refer to a 2.0 pCi/L guarantee and report results coming in under it. This is the right call for a homeowner in central or eastern Massachusetts facing a radon number on an inspection report and wanting it fixed fast and neatly. Confirm the price against a second quote, and confirm who stands behind the guarantee post-acquisition.
“I also got a high quote from them, I ended up going with [theradoncompany.com](http://www.theradoncompany.com/) for less than half the cost, $1150 about \~2 years ago. They upsold me on a fan noise reducer but the price was reasonable and it was close to my tv area so I figured if it helped a little. The instal”
“I used Radon Guys... mine was a re-tooling of an existing system that had died, $650.”
“I used Radon Systems in MA and they were awesome. John came and installed within a few hours or so and did a perfect job. Highly recommend.”
“It's about $1k per system. We also used the Radon Company out of Sutton. They did a fine job. And even patiently waited while my wife and I argued over which side of the window to put the pipe.”
“The company is radon systems llc in Sutton.”
“Protect Environmental Expands National Footprint with Acquisition of Radon Systems LLC and Cliff Cummings Water Services”
“Protect Environmental, a national leader in radon testing, mitigation, and vapor intrusion solutions, has acquired Radon Systems LLC and Cliff Cummings Water Services, two trusted companies specializing in radon and water testing and treatment.”
“Founded in 1985, Radon Syste”
Dave did an excellent job installing the Radon System in my basement. I have a radon meter and after several days post installation, the results have been under 2.0 pCi/L.
professional and effective.
When we initially detected high radon levels in the basement, we were very worried and stressed. Luckily, we found Radon Systems. John promptly answered all my questions and provided necessary documents for review. The installation of the mitigation system was masterfully done. The technician is very experienced and thoughtful. He took the extra time and effort to paint the outdoor components in order to fit into the building environment. The lab results just came back, confirming the radon level has dropped to around 1. It's been a truly pleasant experience with Radon Systems. Thanks John and team for helping us addressing this health risk and giving us the peace of mind.
This company is great. They came quickly, on time and worked 2.5 hours straight, effectively and thoughtfully remediating our Radon problem. Couldn’t be happier. They were a little more expensive, but in my opinion worth every penny.!
John was professional and efficient when installing our radon system. He was mindful of the surroundings and his work was neatly done. He was informative and explained the process of retesting and ensuring the system works. Thank you so much for your great work!
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Added 25 new comments, added 58 new photos, established rating 4.4
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