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Big L: 40 years Strong

2019 BNBEA Business Ethics Award Winner

Big L is honored to be recognized with the 2019 Buffalo Niagara Business Ethics Award, in the mid-sized company category.

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.


WELCOME TO BIG L WINDOWS AND DOORS

Best replacement windows in Buffalo and Western New York

Big L Windows & Doors in greater Buffalo, NY offers replacement windows & doors featuring Marvin windows for homeowners & builders. 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.

We have a reputation for making a Big difference – a Big difference in sales, service, installation, and products.

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

View our window and door products and professional services.

News and Events

How To Find A Window Installer

There are a number of reasons you might be considering replacement windows for your home.   Perhaps they look worn out or have become difficult to operate. Maybe they are not energy efficient or even...


Best Insulated Windows for Home

Benefits of Insulated Windows One of the most important traits of any modern replacement windows are their ability to insulate airflow within the home. The question becomes, who has the best insulated windows for...