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JB Sash and Door is a Chelsea, Massachusetts window and door company that sells and installs Marvin and other brands from a showroom, and says it began in 1940 as a custom millwork shop. It describes itself as a multi-generation family business and a leading New England distributor of Marvin windows and doors. It holds 3.7 stars from 78 Google ratings, and its written reviews split sharply. The satisfied customers talk about the people. A February 2026 reviewer said Ed handled a renovation's windows and doors smoothly and later helped with a warranty issue on a door. A December 2025 customer named Andrew for the estimate and Heidi for scheduling, and an October 2024 customer described a two-day install by David and Gleb's crew with photos and updates along the way. Jackie is named for help choosing doors. The complaints are detailed. In an April 2026 review, a Back Bay condo resident said the person sent to measure a window fell sick and nobody followed up for six weeks, and after the customer took the proposal to the Back Bay Architectural Commission alone, the company never checked back, so they hired another provider. A January 2024 customer who bought eight Marvin windows for $18,000 listed glue between the panes, unsanded wood, missing paint and scratches, and called the installation poor. In December 2023, a buyer of about 80 Marvin windows said one sash arrived broken and they had to pay for the replacement. A June 2025 reviewer also wished the company posted prices upfront. In a January 2026 Reddit thread, one poster who paid $24k for custom wood windows said they love them but they were expensive, and another who paid $10k for windows said they were not super happy and would shop around. Its Massachusetts home improvement contractor registration, #152085, is active on the state registry.
“went with jb sash earlier this year. 6 windows $24k, custom, wood, painted dark green 👍. I love them but they were expensive.”
“I went with JB sash and paid $10k for 8 windows last year. Not supper happy with them so I’d shop around.”
“How was it working with JB Sash? I got a quote from them for 29 windows and it's sticker shock for sure.”
“They did an excellent job spec ing them and I felt price was fair.”
“Used JB Sash for a new front door, expensive but quality and they were helpful.”
They sent someone to measure for a window replacement in My Back Bay condominium. On the day of, the person became sick and was unable to make it. And I forgot about it. 6 weeks later, I had to call JB Sash and ask them if they were ever going to send someone else to measure the window. Finally, they did. They gave me the drawings and proposal and I had to go to the back Bay Architectural Commission on my own; they didn't even offer to join me to be able to answer questions if the commission had any. Great news, the commission approved the window. It's been a few months now, and JB Sash has not even reached out to find out about the commission's ruling. I've now engaged another provider who is actively involved with dealing with the architectural commission and pulling permits. I don't know what this company is doing all day long, but it seems like they're not doing anything for their customers.
I have used JB Sash, working with Ed, for our renovation windows and doors. It all went smoothly. And when there was a recent warranty issue with a door, Ed was fantastic in helping me get it resolved. Thank you!
From start to finish, dealing with JB Sash and door was seamless and professional, they really seem to care, starting with Andrew who estimated my installation to Heidi who scheduled the job to the very talented, capable installers Mark and Ed, I couldn't be any happier with the whole experience, they covered all of the bases without any issues, thank you for going above and beyond, I would recommend this company to anybody!
Very happy with the experience if the team that installed my new windows. They arrived on time when they said they would, kept me informed all along the way during the installation and made sure the place was clean after each install. Jason and Jon were great and would highly recomment JB Sash & Door for future installations.
We’ve been getting our doors from JB Sash for years, and they’re consistently fantastic! The quality is top-notch, the selection is great, and the service is truly unbeatable. Their team knows their stuff and always goes the extra mile to make sure we get exactly what we need for every project. Whether it’s custom orders or standard stock, they’ve never let us down. It’s a huge help working with a supplier who’s so dependable, knowledgeable, and friendly. Makes our jobs run smoother every time. Highly recommend JB Sash to anyone in the trade looking for quality products and excellent service!
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Certified attributes are verified against the public registry. Others are the business's own statement.
2 changes recorded — last scanned Jul 6, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from JB Sash and Door. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,000 – $11,000
Typical exterior project around $7,500
Drywall and plaster3.8
Verified state license2.9
Kitchen and bath remodels2.7
Storm siding repair3.4
