Smart Lock & Door

Smart Lock & Door is a Waltham locksmith and door-repair shop that reviewers know simply as Harry — the name customers use again and again for lock swaps, stuck doors, and hardware fixes. The company says it has been at this for 16 years, and its Thumbtack page shows a 4.8-star average across 693 ratings, with Top Pro recognition every year from 2018 through 2024. What stands out in the reviews is how fast the response is. In an April 2025 review, a customer called on a Friday afternoon ahead of a Saturday house inspection and had Harry show up a few hours later to fix two doors and a loose banister the same day — the reviewer said you don't find a lot of people who'll do that. A more recent review, from August 2026, described a new door frame and lock installed at what the customer called reasonable pricing, and another from that same week mentioned an on-time lockout call where an extra lock was installed for an added charge. One reviewer specifically noted the crew swept up the workspace after fixing three doors that wouldn't stay shut on an older, settling house — the kind of small detail that shows up when someone pays attention to the whole job, not just the fix. There's nothing negative on record here, and the reviews on file lean heavily toward lock and door repair rather than bigger remodeling work — the business also lists door trim and threshold installation among its services, though that side isn't backed by reviews the way the lock and door work is. For a stuck door, a lockout, or a lock upgrade around Waltham, the record here points to quick turnaround and attentive work. For anything bigger, it's worth confirming pricing upfront, since at least one review mentions an add-on charge for extra work.