Come find out how the experts at Big L Windows and Doors can help add curb appeal to your home by replacing your windows and doors. Combining the best quality materials with our experienced staff, Big L is western New York's window replacement leaders. See our Before and After's >>

Come find out how the experts at Big L Windows and Doors can help add curb appeal to your home by replacing your windows and doors. Combining the best quality materials with our experienced staff, Big L is western New York's window replacement leaders. See our Before and After's >>

Come find out how the experts at Big L Windows and Doors can help add curb appeal to your home by replacing your windows and doors. Combining the best quality materials with our experienced staff, Big L is western New York's window replacement leaders. See our Before and After's >>

Come find out how the experts at Big L Windows and Doors can help add curb appeal to your home by replacing your windows and doors. Combining the best quality materials with our experienced staff, Big L is western New York's window replacement leaders. See our Before and After's >>

Hassle-Free Financing Options

We make it easy to realize your dreams today! Big L offers a variety of great financing options including "same as cash" financing with no interest and no payments for one year.

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Proud Guild Quality Member

See what the Guild Quality Community is saying about Big L Windows and Doors.

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Welcome to Big L Windows & Doors

The Best in Windows and Doors for Buffalo and Western New York

If It’s a Window or Door, Our People Know More

Welcome to Big L Windows & Doors, your first choice for high quality Windows and Doors. Our extensive selection of cutting edge products deliver unmatched beauty and state-of-the-art performance for energy savings, reduced maintenance and a more comfortable home.

Big L Windows & Doors delivers a wide array of custom-made styles, decorative options, complementary trim selections and performance packages for a fully customizable solution to suit your individual needs.

At Big L Windows & Doors, we have a reputation for making a Big difference – a Big difference in sales, service, installation, and products.

Big L’s professional approach, highly trained staff, and affordable pricing will help take the stress and confusion out of your new project.

What Our Customers Say

Testimonials for Big L Windows & Doors

Valued Window and Door Installation Reviews from Our Western New York Family

“I would like to recognize the entire team. They did a great job. I was most satisfied with the level of quality of talent and number of people on the job. I was also satisfied with how well they worked as a team and their professionalism.”

-Dan, Amhers...
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News and Events

Therma-Tru Tops Entry Door Ranking

Therma-Tru Entry Doors: Study from 2013 Brand Use Study by Remodeling Magazine. Therma-Tru Entry Doors Therma-Tru ranked first among remodelers in the category of entry doors in the 2013 Brand Use Study by...
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Marvin® Windows and Doors – Automated Exterior Shading System

Marvin Windows and Doors - Automated Exterior Shading System In a first for the window industry, Marvin Windows and Doors is proud to introduce an automated exterior shading system that’s fully integrated,...
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