NSE Windows

NSE Windows NSE Windows is a Factory Authorized Windows and Door Installations Company with locations in Hauppauge, Massapequa, and Water Mill Long Island, New York.
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We are a Manufacturer Certified Retailer for Marvin Windows and Doors, Quaker Windows and Doors, and ProVia Windows and Doors. We have the best collection of Vinyl, Wood and Ultrex Fiberglass Windows and Doors to add style, class, and elegance to your house with almost unlimited customization options. Certifications and Awards: NFRC, BBB, Marvin Windows Customer Service Award, Best of Houzz 2018 Service Award, Guild Quality Member.

We are thrilled to unveil the brand-new NSE Windows modified race car, ready to tear up the track at Riverhead Raceway w...
05/18/2026

We are thrilled to unveil the brand-new NSE Windows modified race car, ready to tear up the track at Riverhead Raceway with the one and only behind the wheel! 🏎️💨

It was an honor debuting this beast at the Smith Haven Mall Car Show. Even better? It was all for an incredible cause, raising funds for the Drive For Dana Foundation to support Long Island Children in Need.

Big things ahead this season. Let’s go racing, Justin! 🤝🔥

This Sunday 5/17 come support a great cause and check out the grand reveal of the NSE Windows sponsored modified race ca...
05/14/2026

This Sunday 5/17 come support a great cause and check out the grand reveal of the NSE Windows sponsored modified race car driven by 👀

Bringing total confidence to every project with the NSE Windows Quality Assurance Program. From factory-trained speciali...
05/13/2026

Bringing total confidence to every project with the NSE Windows Quality Assurance Program. From factory-trained specialists to certified warranties, every project is protected by the best in the business.

Integrated Assurance: Professional oversight at every stage.
Expert Installation: Skilled technicians committed to best practices.
Long-Term Support: Maximum performance.
Experience the difference that true quality and collaboration makes.

04/23/2026

Fake promos? That’s nothing but window pane.

03/16/2026

$3,500 per window?! On Long Island?!

You shouldn’t need a second mortgage just to replace your windows.

At NSE Windows, we believe in:
✔ Honest advice
✔ Fair pricing
✔ No pressure sales

Just beautiful windows, real value, and people you can trust.

Stop overpaying. Start upgrading.

03/12/2026

Marvin Bi-Fold doors are all about opening up the space. Clean operation, a wide opening that lets the light in, and the retractable screen disappears when you don’t need it.

Available in both the Marvin Ultimate and Marvin Elevate lines.

Join NSE Windows at the LIBI Expo on March 26th! We’re looking forward to meeting industry partners, sharing ideas, and ...
03/03/2026

Join NSE Windows at the LIBI Expo on March 26th! We’re looking forward to meeting industry partners, sharing ideas, and showcasing Marvin!

01/21/2026

Before you purchase new windows, ask yourself- what are you really paying for?

Our Marvin certified install crew hard at work on a new window replacement project in Garden City! Stay tuned for the fi...
01/07/2026

Our Marvin certified install crew hard at work on a new window replacement project in Garden City! Stay tuned for the finished product!

Proud to showcase our latest collaboration on a rare find in the Hamptons: this unpretentious 2.8-acre Sagaponack spread...
12/24/2025

Proud to showcase our latest collaboration on a rare find in the Hamptons: this unpretentious 2.8-acre Sagaponack spread, surrounded by 30 acres of protected land and recently featured in .
The stunning new home, designed by renowned architect and built by , features premium Windows supplied by —perfectly blending classic farmhouse charm with modern elegance and breathtaking views. A true gem of privacy and serenity!

Address

5340 Merrick Road
Massapequa, NY
11758

Opening Hours

Monday 8:30am - 5pm
Tuesday 8:30am - 5pm
Wednesday 8:30am - 5pm
Thursday 8:30am - 5pm
Friday 8:30am - 4pm

Telephone

+15165003550

Website

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