Local installer specializing in glass block windows, with in-house fabrication noted on the website and a focus on quick, tidy installations.
Focused scope on glass block windows, responsive scheduling, and tidy on-site practices. Many projects are turned around quickly after measurement, and installation areas are left clean. Estimates are provided with options when available.
North Tonawanda, Niagara Falls, and the wider Buffalo–Niagara region.
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Services include measuring, fabrication, and installation of glass block windows; replacement of broken or aging basement windows; bathroom privacy windows; vented glass block units; and small single-window projects with no minimum window count noted on the website.
Reviews commonly highlight fast turnaround from estimate to installation, sometimes within days. Customers note courteous crews, careful cleanup, and attention to detail. Communication and pricing clarity are mentioned positively, including responsiveness to single-window requests. Several reviews praise punctual arrivals and efficient work on basement and bathroom windows.
I hired them to replace a basement window after the old one had broken and they were able to get it replaced within 48 hours! The crew was extremely professional, courteous and were super clean. I definitely plan on hiring them again for some other projects in the future and would 100% recommend them!
Granto Glass Block did an absolutely amazing job installing a gorgeous window in our bathroom! The crew was thorough, professional and very detail oriented. They left my bathroom cleaner than it was before they came! We couldn’t be happier with the window and the light it brings in. We highly recommend their services; great people!
I found a recommendation for glass block on a local Facebook group for Granto Glass Block. I looked at their website, saw that they didn’t have a minimum number of windows required since I only need 1 (for now). I sent an email with measurements and a picture and got a really quick response with questions and a quote. They came and measured quickly after I put a 50% deposit down and came a few days later and I can’t believe how fast they put in the window! Everything was cleaned up as if they were never there and were done in about 45 minutes! And they offer a discount if you pay in cash, which is always a nice option. I will definitely be calling them to finish the other 16 basement windows in need of glass block, thanks!
Our experience was 5 star. We called and they came out the next day and I had an estimate with options immediately. Although they are very busy, they understood our needs and squeezed us in the following day. Accommodating, professional, excellent work. It’s nice to have a contractor that takes all of the stress off your plate. This job was for my elderly mother and they really came though for her.
We just had our basement glass block windows installed today. From start to finish, Granto Glass Block has been amazing! I called to schedule an estimate and one was provided within a couple of hours. The price was very affordable and the appointment was scheduled within a matter of days- not weeks or months!The crew arrived at the scheduled time and finished replacing 4 windows within an hour and a half! I couldn’t be any happier with the scheduling, the pricing and the quality of work done. Thank you Granto Glass Block!
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This business may offer free estimates for some services.
No-obligation estimate with options when available.
No minimum window count required.
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