Typical Greater Boston range for this kind of work, from regional averages — not a quote from Lamont Plumbing and Heating, LLC.. Use it to sanity-check bids, then get the real number in writing.
Water heaters — tanks, tankless conversions and same-day failures
Emergency response — burst pipe found and replaced within hours
Owner on site — Tom Lamont works the calls himself
Office scheduling — online booking, text reminders, a named contact
Quotes hold — customers report the final price matched the estimate
Gas work — fireplace insert lines and appliance hookups
Clean finish — crews leave the work area tidy
License verified — Massachusetts plumbing license active in the state registry
Hard to reach — one 2★ reviewer in January 2025 got no answer
Short written history — the reviews only run from 2024 onward
Across 150 Google ratings the average sits at a flat 5★, and the name that keeps surfacing in the comments isn't the company's — it's Tom's. One customer in March put the reason plainly: it's a company where the owner is also one of the technicians.
Lamont Plumbing and Heating works out of 770 Washington St in Holliston, and the jobs people describe are the everyday spine of the trade. Water heaters most of all — a tank replaced after it sprang a leak, a tank-to-tankless conversion in April, and, in a December 2025 review, a restaurant unit that turned out to be venting through a misaligned exhaust chute, a job that stretched while parts were sourced. Around that sit gas lines run to a fireplace insert, a stove disconnected and reconnected, an irrigation backflow preventer, a water pressure pump, spigots and faucets, a garbage disposal, and a washer-dryer hookup that turned into pipe rework to bring it up to code.
Speed is the second thread. In February a homeowner with an inch of water across the basement got a call back within fifteen minutes of submitting the web form; the burst pipe, hidden behind a wall, was found, replaced and tested inside a couple of hours. From December 2025, a same-day water heater call where the crew arrived earlier than expected and didn't bill for the emergency visit.
The office is a named part of the experience. Reviewers thank Joan and Joanne for scheduling as often as they thank the plumbers, and they point to online booking, text reminders and the ability to send photos of the problem ahead of the visit. Prices come up the same way: more than one customer notes the final number matched the quote.
Two things to weigh before calling. The written history is deep but not long — 116 reviews, all of them from 2024 onward — so this is volume, not decades of it. And the single dissenting voice is about reach rather than workmanship: a January 2025 reviewer left 2★ after trying several times without getting through. Everything written since runs the other way, but it's a fair thing to test on your first call.
Its Massachusetts plumbing license is active, registered to Thomas Lamont, and its BBB page is an A+ with accreditation. If you need a water heater swapped, a gas appliance hooked up, or someone at the house today because something is leaking, this is the shape of shop built for it. Get the quote in writing before the truck rolls — customers say it holds, which makes it easy to hold them to it.
Heard around town
On Nextdoor
Lamont Plumbing & Heating, LLC. - Holliston, MA - Nextdoor
“Lamont Plumbing & Heating, LLC. - Holliston, MA - Nextdoor”
Did the online appointment, workers showed up (actually called to come alittle early which is always great) on the day scheduled. They completed the work quickly and did an excellent job. Defiantly recommend.
I have used Lamont a couple of times so far and they were great! Joan, Tom and the team communicated well, were professional and timely and did a really great job! Definitely recommend and will be calling them for all my plumbing needs!
Tom and his wonderful team installed a new water heater to replace one that sprung a leak. Work was done quickly, professionally and for a very fair price. Thumbs up for Lamont Plumbing!