Bethlehem Windows - logo

Your Window Company

Serving the Greater Lehigh Valley

2124 Stefko Boulevard, Bethlehem PA 18017

Business Hours:

Monday - Thursday: 09:00 AM - 05:00 PM

Friday: 09:00 AM - 04:00 PM

Saturday; 09:00 AM - 12:00 Noon or by appointment

Sunday: CLOSED

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Great Lakes Windows

We spent decades developing the highest quality vinyl replacement windows and patio doors, homeowners can ever find. We turned our attention to quality in 1981 when the founders of the Great Lakes Window brand discovered fusion welded frames and sashes that were used in Europe. This was quickly brought to their homes in Toledo, Ohio.


Having done almost 10 million vinyl replacement windows and doors, we have set our standards higher and have also been meeting them. We also continue introducing new products, adding new options and provide more support to homeowners coast to coast. We believe our products are as good as the people who make them. So we work with the best home improvement professionals to get quality replacement windows to your home. This is one of the many reasons Great Lakes Window products have an edge ahead of competition.


So come explore Great Lakes Window. Search for the windows and doors that celebrate your unique style and make your home sweet home, sweeter than ever.

Bethlehem Windows is locally

owned and operated.

Discover Great Lakes Windows

For as long as you live in your home, we back every window and patio door from Great lakes Window with our Limited Lifetime Warranty. Moreover, should you ever decide to move away, your warranty is completely transferable to the next homeowner. No questions asked.


And because our windows and patio doors are manufactured in the U.S.A. by Great Lakes Window, a Ply Gem brand, you can have absolute confidence in our products and our commitment to you and your home.

Learn what Great Lakes Windows can do for you


About Great Lakes Window

A warranty you can trust

Warranty coverage

  • Window frame damage

  • Sash

  • Glass seal failure

  • Hardware, screens and more.

Our premium products are manufactured with state-of-the-art technology, modern equipment and cutting edge operational techniques. We derive strength from our parent company, Ply Gem with over 70 years in the building products industry. It helps us go beyond and above your expectations in replacement windows and patio doors. Stop by Bethlehem Windows for more information.

Confidence in our products