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Get in-touch with us
Fill out the form on this page, or give us a call at 716-895-8484. We’ll contact you promptly to assess the windows and doors in your home, and 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.
Select your products
Our Big L Windows & Doors experts will help you select the right products for your home. Choose from Marvin and ProVia’s vast collection of products — including awning windows, casement windows, picture windows and more; as well as sliding, folding and swinging doors. Each window and door will be sized to your home’s specifications and installed in accordance with manufacturers recommendations.
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 care of you through every step of the process.
Schedule a Consultation
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.
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 our customers in the way that best suits your comfort level, we are offering free virtual appointments, in addition to our standard in-home or in-showroom appointments. Request your consultation today – either virtual or in-person – 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—including Marvin and ProVia. Discuss their styles, materials and benefits so you can make an informed decision for your next home improvement project!