Dreaming about a new patio door? Wishing you had a bigger window to see your beautiful yard? Let Big L help make your dreams reality. Big L offers excellent financing to make your project come to life. Learn More >>

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.

Customer Reviews

What our customers say

From a customer in Eden, NY

Current Referrals
We don't know of anyone who might be interested at this time, but we will definitely recommend Big L.


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News and Events

Integrity Windows and Doors Seek Building Projects for RDA Competition

Fargo, ND, March 25, 2015 /PRNewswire Trade professionals are welcome to submit their best building projects to Integrity Windows and Doors' Red Diamond Achiever Awards (RDA) to showcase their work using...
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Marvin Windows and Doors Accepting Entries for Annual Design Awards

Warroad, Minnesota - March 12, 2015 /PRNewswire Marvin Windows and Doors is running its seventh annual Marvin's Architects Challenge, honoring projects that represent the best in architectural design using...
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