McNiff Plumbing & Heating is a Sean McNiff-run plumbing outfit whose Massachusetts plumber license is registry-verified active. The volume here is substantial — 209 reviews from 2021 through this year across three platforms, nearly all five stars, with the work spanning water heater and boiler replacements, leak repairs, gas-line issues, fixture installs, and the occasional bathroom project.
What comes up again and again is speed and availability outside normal hours. Reviewers describe Sean picking up on a Saturday for a frozen pipe and arriving within thirty minutes, answering a Sunday call and fixing a shower valve the next day, and rescuing a Thanksgiving with a broken mixing valve. When a tank water heater blew up, the crew arrived within two hours and finished the install the same day. Several customers say he was the only plumber who returned their call at all after others went unanswered.
Beyond speed, reviewers repeatedly mention clear, upfront explanations — walking people through options before, during, and after a job, and following up afterward. One reviewer credits Sean with catching a gas leak he wasn't there to look for: he thought he smelled gas while working on an unrelated water-softener job, told the homeowner to call the fire department, and the leak turned out to be real. A number of customers describe using him repeatedly over several years for both routine maintenance and one-off repairs, calling him their go-to plumber.
In a 2023 review, though, one customer described a serious dispute: they said Sean claimed not to have been paid for a $1,200 job despite their bank records showing the payment went through, and that he later came to their door and banged on it. It's a single account, at odds with everything else in the reviews, but a serious enough allegation to ask about directly if it comes up.
Recent activity keeps the overall pattern going strong — 22 reviews in the last six months, none negative. For plumbing and heating work — water heaters, boilers, leak repairs, and the occasional bathroom fixture job — this is a business with a deep, largely glowing written history, and it's worth confirming pricing and payment terms in writing given the one dispute described above.
