Verified record
G.M. Walsh Plumbing & Heating has operated in Massachusetts since 1980, according to BBB, and is based at 128 Coolidge Hill Rd in Watertown. Gregory M. Walsh is listed as owner, with four to six employees. The work spans plumbing and heating. A 2024 Google reviewer described a toilet correction that required repairing the floor and installing a proper flange, while a 2025 customer described a gas-leak repair arranged within a couple of hours. BuildZoom lists 240 permitted projects and a score of 104. It lists active Home Improvement Contractor and Construction Supervisor licenses verified in August 2026; the plumber-license entry shows an expiration date of May 2026, so confirm its current status before booking. The written reviews are mostly positive but include a one-star March 2026 comment with little detail. Walsh is worth considering for plumbing and heating work; ask for the current license status and a written scope before work starts.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from G M Walsh Plumbing & Heating. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$290 – $710
Typical plumbing job around $500
mean old lady not open to talk
Awesome experience! The dispatcher on the phone was a bit gruff and kinda sarcastic, but that's new england charm right? But stick with the dispatcher! She really did us a favor and got us a repairman in just a couple of hours. The guy fixed a minor gas leak. He was very communicative and just a nice guy. And in the end, it cost 1/3 (yes, one third) of what a bigger company quoted me for the same work earlier that day! Highly recommended and will be our go-to company for routine jobs.
Greg and his team corrected a long-standing problem with my bathroom toilet. The toilet wasn't installed properly by the original contractor. Greg walked me through the whole process in a calm clear voice. Folks I am a very picky person who tends to hover over service people, and this has been a problem in the past. Greg and his team were unfazed by my hovering and constant questioning. They were VERY patient with me and answered every question. They had to repair the floor and install a proper flange before they could install the toilet. The work took four hours but when done the job turned out absolutely perfect! I firmly believe that no other plumber would have done what Greg did. I received the bill a few days later and it was VERY reasonable. I told this story to a couple of friends, and they responded with "Oh we know Greg he is great!" I also recently learned that he donates to charities in our community. That's why I will always use Greg Walsh Plumbing and Heating, and you should too!
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1 change recorded — last scanned Sep 8, 2026.
Lays out three repair options up front4.0
Active license3.3
Fast emergency response2.9
25-year customer relationship3.5
