Aspen Home Improvements
“Work on replacing rotted wood soffit and fascia on 3 sides of 3 story brick farmhouse was completed quickly and professionally with quality Azek brand detailed product.”
Best Window Installers in Lancaster, PA
15 companies listed · 11 in Lancaster · 1 open 24/7 · 4 open weekends · all 15 rated 4.5+
Data verified October 31, 2026
Klausmair Construction
“Klausmair was fantastic, providing a quick estimate and working with the insurance company to ensure they provide accurate compensation.”
George J. Grove & Son Inc.
“The roofing, siding, and windows were all installed with precision and attention to detail, resulting in a beautifully finished product that has significantly enhanced the curb appeal and functionality of my home.”
The Exterior Company
“Kyle was incredibly thorough in explaining the entire process and was patient with us as we conducted our due diligence.”
Lancaster Door Service
“Aaron the repairman even helped me connect our vehicles to the new garage door so I wouldn't have to figure it out on my own.”
Sunnyside Roofing LLC
“Sunnyside did a roof and dormers for me with affordable pricing and a great crew.”
Listed for homeowners in and around Lancaster, PA, 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: Lancaster, PA
11 of the 15 companies we list are based in Lancaster; the other 4 serve Lancaster from towns including East Petersburg (5 mi), Conestoga (6 mi) and Strasburg (6 mi). The companies on this page are rated from 4.6 to 5.0 across 3,685 reviews; 5 have 50 or more reviews. When customers rate these companies on specific qualities, they most often praise professionalism (88%), quality (88%) and responsiveness (85%). The topics that come up most in reviews of the companies on this page are "price", "cleanliness" and "communication". 1 is open around the clock; 4 are open on Saturdays and 1 on Sundays. The services the companies on this page list most often on their websites are gutter replacement (2), roof repair (2) and siding (2). 5 show a license on their websites; 1 lists staff certifications (HAAG) and 1 has a BBB rating of A or A+. 11 have ten or more years of experience, the longest 72 years. 2 offer emergency call-outs; 4 offer financing or payment plans; 7 give free estimates; 4 are family- or locally-owned and 1 lists 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.
Which listed window installers say they are licensed?
5 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.
DRS Home Improvements
“We had a very positive experience with this family business, and will recommend them highly to friends and family.”
RFO Contracting
“When I had other work being done, which I often had to oversee, I knew RFO would be doing their part with zero interruptions.”
Revolution Builders Inc
“You will know what to expect with your project and they will deliver on every promise.”
I & D Contracting
“I have relied on I&D Contracting for my roofing needs for almost two decades now, and they consistently exceed my expectations.”
Autoglass Works
Graystone Roofing & Siding
“Brian and his crew, John and Keith were all very professional and conscientious on what we specifically wanted for our home.”
Daryl Bollinger Co. LLC
“From the beginning, they listened to what we wanted, made suggestions, and offered quality options for us.”
Run Valley Exteriors
“It was no easy task, but they finished the job and exceeded my expectations.”
Dreamaway Exteriors
“Without question the most outstanding contractor I have ever done business with.”
Why these companies made our list
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