Big L is celebrating 40 years of providing Western New York with the best window and door products available, and matching it with unbeatable quality service. See the video>>

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 >>

Our May Project of the Month is the Hunt Real Estate Office expansion in Buffalo, NY. Take a look at the products we used in replacing this office's windows. Learn More >>

Rest assured that your products and installation services are covered with Big L's Total Trust Guarantee. We offer the utmost responsibility for the products and services we offer. Learn More >>

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
Jackie J. in Cheektowaga, NY
Big L is the best place in my opinion to do business with ... Very knowledgeable very willing to answer all your questions ... The...


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News and Events

Big L Celebrates 40 years!

Big L Celebrates 40 years of service to Western New York! Big L is proud to be celebrating our 40th anniversary, which means 40 years of providing great windows and doors to all of Western New York. We are...
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Marvin Windows and Doors Reveals Architects Challenge Clash

The 2016 Marvin Architects Challenge has began another segment of the yearly contest called the Architects Challenge Showdown. In May, there were six architect-designed projects proclaimed as winners in their...
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