DIAMOND FLOORING ( HARDWOOD FLOOR INSTALLATION & REFINISHING)

Sanding, staining, and laying hardwood is essentially all Diamond Flooring does — no kitchens, no additions, no general remodeling. The Dorchester company works out of 4 Charles St and says it has been at this since 2000, roughly 26 years, serving Boston and a wide ring of towns around it that includes Belmont, Braintree, Arlington, Bedford, and out to Barnstable. The work splits between new installation and bringing old floors back: hardwood installation, sanding and refinishing, board repair and restoration, plus luxury vinyl plank and laminate, on both residential and commercial jobs. The company describes itself as part of the BONA Certified Craftsmanship network, a manufacturer training program for wood-floor finishers, and lists that affiliation on its own site and on its Thumbtack page. Thumbtack is where the deepest history sits: a 4.8 average across 76 reviews, 130 hires, 10 employees, and Top Pro badges in 2017, 2019, and 2020. This spring, a homeowner hired the crew for a 2,001–3,000 square-foot solid-wood job that combined new flooring with refinishing in existing areas, and described the result as well executed. Other directories echo the pattern — Porch shows 4.84 from 112 online reviews, ProsGrade lists a 5.00 average across 109 — though those aggregates are compiled from elsewhere rather than independently gathered. One thing to settle before signing anything: the Massachusetts Home Improvement Contractor registration listed on Thumbtack, #192108 under Andy Nguyen, was verified back in October 2020 and shows an expiration of October 3, 2022. That is a stale entry on a third-party profile, not proof of anything current, so ask for the active HIC number and check it against the state registry yourself. Worth noting too that Porch files the company under a Braintree address while the site, Google, and most other listings put it in Dorchester — likely a second location or an old record, but confirm which shop is doing your job. There is also a gap between the directory aggregates and what shows up in this profile's own review history: a handful of reviews spanning 2017 to 2026, weighted toward the older end. The recent stretch is quiet rather than troubled — nothing negative surfaced in the last six months. If your project is a floor — refinishing tired oak, restoring a parquet, or installing new solid wood, LVP, or laminate in a Boston-area home — this is a shop built specifically for that work, with a long directory history behind it. Get the current license verified, confirm the servicing location, and ask for the written scope and price in advance.