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

From a customer in Kenmore, NY

Area Of Satisfaction
The quality and the service. The quality is great! I even called to order a door with a doggy door at the last minute and...


View all feedback from Big L Windows & Doors

News and Events

How to Choose an Energy-Efficient Door

Most homeowners don’t think of their front door when determining how to save energy in their home. But as with windows, exterior doors lower the insulating value of the surrounding wall. A poorly installed...
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How Green Should You Go? Energy Efficient Homes on the Homes by Architects Tour

This year's tour features more energy efficient home designs than any other in its nine-year history. If green design is on your list of interests, or even if you've never seriously considered energy efficiency a...
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