Cox's Old Colony HVAC & Plumbing

Cox's Old Colony HVAC & Plumbing works out of Hanover, MA, and the name that comes up again and again in its reviews is Bill — the same person quoting jobs, taking emergency calls, and showing up on-site. The company says it has served Hanover and the South Shore since 1947, more than 75 years by its own account, covering towns from Braintree and Duxbury to Kingston and Plymouth. Google shows 4.3 stars from 98 ratings, built from 49 reviews collected between 2021 and 2026 across five different sites — a track record too broad to be a fluke. The most recent one, from June, describes Bill as helpful and knowledgeable on an AC call, and it lines up with the shape of the year before it: repeated praise for same-day or next-day turnarounds on furnace and AC work, and Bill himself following up rather than handing a job to someone else. On the Better Business Bureau's site the company carries an A+ letter grade and 78 years in business, though it has never applied for formal accreditation there. A couple of things are worth asking about directly. One review describes a job with some setbacks along the way before the crew got it finished, so it's fair to ask what happens if a job doesn't go as planned. Pricing itself isn't detailed in any review here, though an outside directory describes it as reasonable for emergency calls — get a number in writing before work starts. This reads like the company to call when a furnace quits in January or a rental's AC dies in July, not a routine-maintenance plan — the reviews are almost entirely about urgent fixes, not tune-ups. Given how much of the record centers on one person, ask specifically whether Bill or another technician will handle the job before booking.