Top Sash Windows & Doors

Top Sash Windows & Doors is Vassiliy's Waltham company, and what it does is replace windows and fit entry and patio doors using its own crews rather than subcontractors. Customers who wrote before late 2023 know the business as VIVA Windows — one of them noted in a November 2023 review that the company re-branded to Top Sash months after his own job, and the company's site says the same. The jobs tend to be big counts done fast. A homeowner who had just moved into an old house had 29 windows replaced in May 2026 and wrote that Vassiliy did everything he could to get them in quickly. In November 2023 a customer had almost 40 made-to-order windows arrive in five to six weeks and swapped out in under two days. In March 2023 another had 15 windows replaced in a single day, with the installers arriving on time and the truck clean. The way the work is set up draws as much praise as the windows. Customers writing in 2023 describe measurements taken at the promised hour, options laid out to choose from, a quote one of them called free of gimmicks, a condo board's approval handled for them, and a final walk-through at the end of the project. A 2024 customer said questions came back promptly and with real information. For replacement windows, an entry door or a patio door anywhere from Boston out to Woburn and Burlington, this is a strong call. Ask what the lead time on the order looks like now and confirm who will be on site for the install.