Commonwealth Glass & Mirror Corporation

Commonwealth Glass & Mirror has been cutting and installing glass out of its Grove Street shop in Watertown since 1958 — a family-owned business, by its own account, now closing in on 70 years in the same trade. It's the kind of shop people call not just for a broken pane but for the odd, bespoke job: a custom mirror wall, a piece of glass cut to fit a specific cabinet, a repair nobody else wanted to touch. That reputation shows up across the record. In a 2024 review, a homeowner described Bob's custom mirror installation across a 16-by-30-foot master bedroom, angled to reflect the fireplace and seating area and make the room look bigger. The same year, another customer needed glass cut for kitchen cabinets and had it done the same day, even after mis-measuring a few pieces. And in a 2024 review, Bob was credited with getting a 93- and 96-year-old pair of aunts' stuck slider door working again rather than steering them toward buying a whole new one they didn't need. Older reviews echo the same theme on smaller jobs: a 2024 review describes a chipped vase repaired "like magic," and a 2021 review mentions a tiny custom piece of bevelled glass fitted into an old clock case. Not every account is glowing on price. A 2025 review said Commonwealth quoted "literally twice as much" as other established local shops for the same job, and a 2022 review — otherwise five stars for responsiveness and on-time arrival — noted the cost came in "a little higher" than expected. Worth getting a second quote if the job is a straightforward glass swap rather than the custom work the shop is known for. Commonwealth Glass & Mirror is the call for the harder, more custom glass and mirror jobs — the kind where fit, detail, and not wrecking an old frame matter more than the lowest bid. For routine work, it's worth comparing at least one other quote first.