Welcome to Cosmo
Supplier of Doors, Windows & Skylights

Here at Cosmo Window & Door we have over 100 combined years of sales knowledge and experience in doors, windows and millwork for residential and commercial construction. Our experts provide a well thought out blend of different products, features and solutions so you can make the best choice for your window and door needs.

Need a jobsite visit?

Our outside sales representatives will come to your job to assist you in making the right product selection for your project. Cosmo Window & Door serves Long Island and the metro New York, New Jersey and Connecticut areas.  Complete our quick contact form for more information.

Trade ~ Pro ~ Homeowner with a Major Remodel or Minor Renovation

You will always receive expert advice and personalized attention from all of us at Cosmo Window & door.

Product Lines

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Interior &
Exterior Doors

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Energy Efficient
Windows

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Beautiful
Skylights

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Architectural
Products

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