Diamond Mechanical Inc

Diamond Mechanical is a Weymouth-based HVAC/R contractor working the commercial and industrial side, with plumbing and building-controls work on top, and 24/7 emergency service listed alongside it. The one review that actually describes the work — from December 2024 — called the crew down-to-earth and easy to work with on a job the reviewer described as complicated, and said the team genuinely cared about the outcome. The two other reviews from that same December, though, aren't about the mechanical or plumbing work at all: one describes a Diamond Mechanical van running a stop sign and leaning on the horn at pedestrians in a crosswalk near Harvard Square, and its author says outright they can't speak to the company's actual services. The other is a short complaint about the same kind of driving, with no mention of any job. That leaves the low Google star count — 2.3 from four ratings — reading more like a note about a company van's road manners than about the quality of its HVAC or plumbing work, though a company vehicle drew two similar complaints within the same week, which is still worth keeping in mind. Only a few written reviews exist so far, so it's worth asking for references on a specific job type — commercial HVAC, industrial mechanical, or plumbing — before hiring.