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Diamond Flooring is Andy Nguyen's Dorchester hardwood shop, and much of its recent work has been bringing old floors back. A June 2026 customer said Andy came out on short notice to measure, pointed out water-damaged boards that would stay discolored after refinishing, called again mid-job to confirm it, and let the customer move the start date several times while another contractor's renovation ran late; his crew sanded a 1,000 sq ft second floor in a day and applied finish coats over the next three. An August 2026 Dorchester condo customer said worn, scuffed floors came out looking brand new, and a July 2026 customer said the job finished ahead of schedule. Thumbtack shows 4.8 stars from 76 ratings and lists the company as a Top Pro in 2017, 2019 and 2020; its customers have written about it from 2017 to 2026. The company says it has been in business since 2000. In August 2017, a Thumbtack reviewer gave 1★, calling the job horrible and saying the homeowner was furious about how it came out. The state registry shows the company's Massachusetts home improvement contractor license as expired.
What a transformation! When we moved in a few years ago to our condo in Dorchester our floors were in rough shape. Lots of wear by the entryway and black/grey scuff marks. These guys made it look completely brand new! I wish I had taken before photos. They also were super prompt and communicative throughout the process. Left the condo very clean! Thank you!
Andy's crew arrived on time and immediately got to work. Within 15 minutes they had their equipment wired into my panel and started sanding. They got the job done ahead of schedule and brought the floors back to great condition. The price was unbeatable. Thank you!
Excellent hardwood floor refinishing company! Andy was extremely responsive, knowledgeable, and professional. His crew had excellent attention to detail and did a fantastic job. Stunning results! Oak flooring finished in Golden Oak - semi gloss
Andy and his team totally transformed the original hardwood in our new-to-us home. From start to finish, Andy was always prompt in answering calls and emails. He came for a site visit on pretty short notice to measure the space and pointed out areas of wood that were water damaged by the previous owners. During the walkthrough, he let us know that these areas would still be discolored after refinishing so that we were not surprised or disappointed by those spots. He even called again during the project to remind us of this and confirm that the damage unfortunately remained. Aside from those small areas, the rest of the flooring received a total facelift and looks practically like new! We are in the process of another home renovation project with a different contractor and have hit so many bumps and delays that required us to move out the flooring project multiple times—Andy was incredibly flexible with us and allowed us to adjust our schedule as needed. His team arrived promptly on the start date and worked all day to complete sanding of our 1000sqft second level and applied the finishing layers over the next 3 days. They brought materials to protect other parts of our home from dust and made a good effort to keep the house clean. Pricing was affordable and very competitive compared to other companies we received quotes from. We definitely recommend Diamond Flooring for hardwood refinishing and would be happy to work with them again for future project needs. The after photos are posted first! You can see how dramatic the improvements are, especially in our wood stove room and largest bedroom. We went with a satin finish as we preferred something less shiny. The damaged drywall shown in some after photos is another home project in progress.
Andy and his team did an excellent job installing new flooring as well as refinishing areas in our home. Details: Solid wood • 2,001 - 3,000 sq ft • I'm flexible • Home — Floor Installation or Replacement
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2 changes recorded — last scanned Sep 26, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from DIAMOND FLOORING ( HARDWOOD FLOOR INSTALLATION & REFINISHING). Use it to sanity-check bids, then get the real number in writing.
Estimated range
$6,000 – $9,600
Typical flooring project around $7,800
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