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24 companies listed · 8 in Gaithersburg · 2 open 24/7 · 18 open weekends · 23 rated 4.5+
Data verified October 21, 2026
Listed for homeowners in and around Gaithersburg, MD, these 24 companies fit and repair windows. Frame materials, glass options and any credentials shown are taken from company websites; the customer lines are quoted from public reviews.
8 of the 24 companies we list are based in Gaithersburg; the other 16 serve Gaithersburg from towns including Rockville (5 mi), Sterling, VA (14 mi) and North Bethesda (8 mi). The companies on this page are rated from 4.3 to 5.0 across 5,112 reviews; 21 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (95%), quality (86%) and responsiveness (84%). 2 are open around the clock; 17 are open on Saturdays and 9 on Sundays. The services the companies on this page list most often on their websites are siding (5), gutters (4), residential roofing (4), windows (4) and commercial roofing (3). 10 show a license on their websites; 1 lists staff certifications (GAF) and 8 have a BBB rating of A or A+. Domain records put 15 websites of the companies on this page at ten or more years old; the oldest dates from 2000. 2 offer emergency call-outs; 14 offer financing or payment plans; 17 give free estimates; 13 are family- or locally-owned and 2 list coupons or special offers. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
A no-cost quote is offered by 17 of the 24 companies on this page. Expect a sales presentation with it. Set a time limit before the appointment, ask for the written quote to be left with you, and treat any price that expires when the salesperson leaves the house as a reason to keep looking.
