American Custom Contractors
“From the first discussion with William about the project, to the sales team, the project manager, and the crew, everyone was professional, incredibly responsive, and highly competent.”
Best Window Installers near Germantown, MD
These companies serve Germantown from nearby bases in towns including Gaithersburg, Rockville and Ijamsville.
15 companies listed · 3 open 24/7 · 14 open weekends · all 15 rated 4.5+ · 7 show a license
Data verified October 21, 2026
Arch Exteriors LLC
“They were communicative, efficient, and very quiet and respectful in our house with two sleeping babies.”
Alco Products Inc.
“There was one hiccup with the order that resulted in a slight delay, but Alco went the extra mile to rectify it and make sure everything came out perfectly.”
Shanco Roofing
“Great job by Seth Seigler doing my inspection and setting up my installation.”
MLM Home Improvement
“Appreciate Mr Mike Twining's help in coordinating the work and making sure the workmen called us ahead with an eta of their arrival, and subsequent follow up”
American Choice Exteriors
“Amir, the owner sent an employee out to inspect the damage same day as request.”
Listed for homeowners in and around Germantown, MD, these 15 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.
Area overview: Germantown, MD
The 15 companies on this page are rated from 4.7 to 5.0 across 4,942 reviews; 14 have 50 or more reviews. When customers rate these companies on specific qualities, they most often praise professionalism (95%), quality (85%) and responsiveness (81%). The topics that come up most in reviews of the companies on this page are "estimates", "price" and "communication". 3 are open around the clock; 14 are open on Saturdays and 5 on Sundays. The services the companies on this page list most often on their websites are residential roofing (3), commercial roofing (2), roof replacement (2), roofing (2) and siding (2). 7 show a license on their websites and 4 have a BBB rating of A or A+. 9 have ten or more years of experience, the longest 70 years. 4 offer emergency call-outs; 11 offer financing or payment plans; 12 give free estimates and 7 are family- or locally-owned. We have a website on file for all 15 of the companies on this page; all 15 publish a contact page; 10 list a public email and 2 take bookings online. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Which listed window installers say they are licensed?
7 of the 15 listings on this page show a license on their websites. Contractor licensing is handled at state level and the license can be checked with the issuing board, including whether the insurance behind it is current. The listing repeats what the company published about itself and is not a verification of it.
Central Exteriors
“Thank you for making my house safe from whatever storms come by, even the winter ones”
Goodgood Roofing & Siding
“Jason , the project manager is very prompt in communications, and the work quality was very good.”
Arht Home Solutions Roofing & Siding
“They dropped off all the materials the day prior to the scheduled install so had I not said anything I would've had a giant patch of dead grass in my front yard...”
Capitol Improvements
“Lance, Pat, Seth, Ryan and the entire work crew were all amazing, a credit to the trade and the company.”
Home Tech Exterior
“New roof all done in one day and covered stuff to ensure no damage or debris getting on things.”
Mid-Atlantic Home Improvement Co.
“His price was great and I actually asked for a quote to do more work as I was impressed with the quality of work and professionalism.”
Eastern Exteriors
“His professionalism was immediate, and the entire roof replacement was completed by the following week—a turnaround I didn't think was possible.”
Premier Windows & Glass
“I waited a few days to make sure the fogging wouldn't return, and I'm happy to say the windows are still perfectly clear.”
Dream Exterior
“They gave the cheapest of three bids and offered the most, plus did a great installation.”
Why these companies made our list
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