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    Ultimate Windows

    3.0 (2 reviews)
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    JB Sash & Door - The outside of my building. Chipped paint all over. They told me painting was included.

    JB Sash & Door

    (49 reviews)

    They remedied the situation so turned my 1 star review into a 5 star review. I was very happy with…read moreeverything.

    We called JB after a long, exhausting, and ultimately unsuccessful experience trying to get our…read morewindows replaced by another contractor (who shall remain unnamed). Our neighbors had used JB successfully, and the city of Boston's historic-approval folks told us that, while they can't recommend any window contractors, they've had nothing but good experiences with JB. The whole process was quick, transparent, and professional. They had the windows made in Italy, and--after we gave them the exact shade of paint that our bedroom was painted in--they took care of the rest. It happened that, on the day when the installation was going to happen, we were going to be out of town, so we left them a key in a lockbox. They took care of everything. They sent us photos so that we could see what they'd done while we were gone. There was a bit of confusion: after they left, we noticed that we no longer had screens in our windows (which we'd obviously want during the summer). Without needing to say another word, they came by and spent the morning installing the screens. The windows are beautiful, and are a huge improvement over the rotted ones we had there before. Since our apartment faces onto a historic park, we needed city approvals before the installation could go ahead; they handled all of this for us. Full disclosure: to replace two historic windows, tear out the old ones, etc., we paid $12,755.55 (of which about $9000 was parts; the remainder was labor). It was a lot of money, but it was totally worth it. What I've discovered by working with multiple contractors from multiple trades is that you get what you pay for. You could probably find a cheaper contractor, but you're unlikely to find a better one. Specifically: if you're in the South End of Boston, JB works here all the time. They know the neighborhood and everyone loves them. So do we.

    Good Window Works

    Good Window Works

    (35 reviews)

    Financial District

    You ever have a basement window just....sporadically shatter for no apparent reason? Well,…read moreevidently this is just a thing that randomly occurs in this part of town. The last time I had glass shatter spontaneously was back in '24 when our winter storm door screen was completely pulverized by the summer heat, it seems (Pro-life tip: swap out your storm door screens in the summer with mesh ones). On the back of that unforeseen devastation, out went my mass inquiries to all the local shops servicing the Nashua area. Out of maybe 5 (?), 3 responded almost instantly. One sent a quote so high, I was half tempted to reply and ask if I could have some of whatever they were smoking. Another replied with what seemed to be a promising rate, but there was one problem. Their communication was severely intermittent to the point where they inexplicably ghosted me faster than a recruiter responding to a job applicant. Ultimately, I settled on Good Window Works. They offered a fair quote, were easy to get ahold of, and even provided a COI statement as per the request of our housing board. For those unaware, a COI is a Certificate of Insurance. Basically, it's assurance to the board that the contractor in question is insured to complete the job without creating a liability if they, say....jam their thumb beneath a tack hammer or something. With those formalities out of the way, the job was simple enough: Replace the half of the basement window that abruptly disintegrated. All in all, the job took roughly 2 hours. In the end, the window he installed was so transparent, it looked like there was no pane at all in the frame. But no--the glass was just THAT pristine! I don't say this often, but....experiences like these are what I love most about being a Yelp writer. So rarely do I get to be in the position to not only promote another hard working local business, but also pose as the microcosmic advertising vehicle that just might serve as the prompt some very fortunate individual needs to go, "Yeah, I'm hiring this place to work on my house". If you're wondering whether you should hire these guys for your next installation or repair job, the answer is likely yes. Good Window Works is worth 5 window panes clearer than thin air out of 5.

    Yuriya came out to do an estimate. We filled out a contract and he took my deposit. Said 2-3 weeks…read moreto get job done. Has now been over a month and nothing. I have called numerous times and when someone at Good Windows Works actually answers it is the same woman who verifies my standing order and says someone will call me back, but no one ever does. The only way to get them to answer the phone is to block caller ID. When I call without blocking caller ID the call goes to voicemail to leave a message. Messages never get returned. This company did work for me before with no issue, but has now become a nightmare! They have stolen my deposit at this point.

    Zen Windows Boston - Soft-Lite Classic Plus Picture Window with colonial grids

    Zen Windows Boston

    (24 reviews)

    Last summer I used Zen Windows to replace most of our windows and they were great!…read more I am going back to them again now to replace the remaining windows that we skipped last time. I would recommend them again and again, I am very pleased with their work - very professional and quick installation.

    We signed with Zen Windows at the end of July after being told--in writing--that installation would…read morehappen within 4-6 weeks. It's now mid-November, and not only are the windows still not installed, but the installation date was just pushed again to mid-December--almost five months after signing. We specifically reviewed the timeline because we wanted this done before it gets cold. We have booked dog daycare which has to be rescheduled, it affects our schedules, plans, and will massively impact our work, which is WFH. The measuring process was chaotic. The person sent to measure always gave last-minute notice and had to come out multiple times because they kept miscounting the number of windows--always short by one. Communication throughout this process has been terrible. You have to constantly follow up for updates; Zen never reaches out proactively or takes ownership of delays. Every update comes only after you chase them. When we brought up these issues, the company's response was to blame the original sales rep, who is "no longer with them." Convenient excuse, but the timeline and promises were in writing. Zen has taken no accountability for the misinformation or poor service. Yes, they may be cheaper than competitors, but you truly get what you pay for--unreliable timelines, lack of professionalism, and customer service that's downright egregious. Buyer beware!

    Ultimate Windows - windowsinstallation - Updated August 2026

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