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We would love to hear about your experience working with the experts at Big L. Write us a review and let us know how we did!

Get our Exclusive Total Trust Guarantee

When you buy new windows and doors from Big L, you can rest easy knowing our work and products are backed by our Total Trust Guarantee.

We’re Hiring!

If you’re looking to join a team of dedicated professionals then we may have an opportunity for you. Read further to see if we have an opening that fits your skill set.

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.


The best home window replacement company in Buffalo and Western New York

Big L Windows & Doors in greater Buffalo, NY offers home window replacement & replacement 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

Ready to Join the Big L Team?

Job Postings Are you looking to further your career with a team of passionate and dedicated trade professionals? At Big L, teamwork really makes the dream work, so we’re always interested in meeting those...

Installer – Windows & Doors

Job Description Job Title: Installer - Windows & Doors Department: Installation Reports To: Norm McRobb FLSA Status: Hourly Summary Our ideal installer is a person who can bring their energy, construction...