Follow These Easy Steps:

Virtually get in-touch with us

Fill out the form on this page. We’ll contact you promptly to discuss your project and your preferred method of virtual interaction. We’re set up for virtual meetings in a variety of ways to accommodate your preferences and comfort level. You can also email us at info@biglwindows.com or give us a call at 716-895-8484

We go to work!

We’ll take an assessment of the windows and doors in your home that you want to replace. Your sales consultant can gather all necessary measurements from the exterior of your home. After our assessment, we’ll contact you via your preferred method of communication and present you with a variety of options customized for your needs.

We deliver on our promise!

After you make your decision, we’ll work with you to schedule precise measurements and installation of your project. Our Total Trust Guarantee is our promise that we will take of care you through every step of the process.

Free Virtual Appointment

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Benefits of Big L


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 – it’s our promise to you that you’ll be completely satisfied for years to come.


Easy Financing Options

Big L, along with our partners GreenSky Credit, can offer easy financing plans to help you achieve your dream home. Tailor your window and door financing plan to fit your needs with our flexible terms, low interest options and payment plans that work best with your budget.


Expert Installation

Big L’s expert team of trained installers will help manage your project beginning from measurement all the way through delivery and installation, making sure your job is done right! No surprises, no hidden costs, no hassles.

Your neighbors and our customers in their words


Tina – Williamsville, NY

Edward – North Tonawanda, NY

Stephanie – Amherst, NY

We're here to help you

We at Big L Windows & Doors care for the safety of you and our community. With efforts to best serve you and our customers during the COVID-19 virus, we are offering free virtual appointments. Request your virtual consultation today to discuss window and door replacement projects, and get a free quote.

Talk with our professional staff of window and door experts about the national brand products we carry, such as, Marvin, Therma-Tru, Restorations, and ProVia. Discuss their styles, materials and benefits so you can make an informed decision for your next home improvement project!