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We do not employ high-pressure salespeople & we won’t “strategically” make you buy on the first visit. When providing us the opportunity to meet, one of our team members with asses you current area of concern. If we can help you, we will answer all of your questions, share our expertise and provide you a the right solution. We mutually agree that time is to be valued. No sales gimmicks, no canned presentation, no pressure tactics.

  • None Pressure Sales Approach
  • No One-Call Close
  • No Quick Turn Concept


NSE Windows is a Factory Authorized Windows and Doors Installation Company and Replacement outlet with 3 locations on Long Islander as well as Jupiter, FL. NSE Windows services include professional windows and doors installation and replacements. NSE is Long Islands Premier Authorizes Marvin Dealer, Certified Marvin Installer & Marvin Service Division.


At NSE windows, we acknowledge that our customers are the foundation of our business. As a matter of fact, our business has continuously grown over the years by putting our clients first, completing their projects on time, keeping our word, and always focusing on their concerns.

Our team has spent many years learning the many aspects of our rather unique industry. But what we share is that we acknowledge the statistics. The fact that our industry is #1 in consumer complaints (consumer affairs) and that’s because it suffers from dishonesty. We believe through education – we outshine our competition.


Yes, there are many replacements window companies, but we believe we are the safest, most secure and risk free choice.

  1. We live and breathe Long Island. We participate in the community and believe in more than making money. We believe in making Long Island a better place, and our part begins with taking pride in what we do.

  2. We believe in education and anyone who works on our team is trained and certified. We do not hire salespeople; we hire experienced & knowledgeable people who are capable of constantly obtaining the highest level of expertise.

  3. When you talk about pride, integrity is right next to it. Our desire to exceed our customers’ expectations doesn’t end after you’ve become our client. We believe in keeping to your budget, time schedule and our promises.

  4. Steps 1, 2 & 3 allow us to provide you with the right product for you, at an affordable price. With NSE Replacement Windows, less is more.

  5. We are visionaries and that’s why we believe we are successful.


Since 2014, NSE Windows has been fully committed to Marvin. Why? Because we believe in the people behind the company and the quality of products they produce.

Marvin is a family owned and operated, U.S. based company. For over 100 years, Marvin has worked building and maintaining their distinguished reputation for quality, innovation, and customer commitment. Today Marvin is one of the largest made-to-order wood window and door manufacturers in the world.

Designed for People

Marvin is designed for people, imagining new ways to help them feel healthier and happier in the spaces where they live, work and play.

Made in America

Marvin was founded in Warroad, Minnesota, in 1912, and now has manufacturing locations across the United States.


Marvin has always been driven by the spirit of possibility. Marvin looks for what they can do better — and then design it.

Community + Sustainability

Marvin is dedicated dedicated to environmental stewardship and go to great lengths to ensure green efforts are maximized.


  • Factory Certified Installers
  • Trusted by the most sophisticated builders and homeowners.
  • Locally owned and operated.
  • Our employees are involved in the community.
  • Nationally Acclaimed Manufacturer Direct
  • Non-rushed decision-making process, we’re ready when YOU are. We are not a sales company, a service company.
  • Four (4) beautiful showrooms with live samples
  • Guild Quality approved
  • Hurricane & Coastal Approved Windows


Our goal is to have your window experience as seamless and easy as possible. We won’t stop until we meet and exceed your expectations.

Free Consultation

When YOU are ready, our window experts are Ready. We will setup a date and time that works best for you and anyone else that is involved in your project. Our window experts will learn about what you would like to have done, and what you need to have done. If we can help you, we will further discuss your project objective, and take precise measurements.


We will invite you to our showroom – the one of your choosing to further discuss the your projects needs and specifications along with any necessary details.

Tech Measure Inspection

Whenever you decide to move forward, our specialized and trained window technician will setup a date and time to come to your home to measure each of your fenestrations that will be replaced to the exact measurement, review and verify each items specifications in its entirety and review what to expect during the installation process.


Our team will order all necessary products and insert your project will be put into our installation schedule! Our certified and factory trained techs will make every effort to prevent any disruptions to you home during the installation process. We officially welcome YOU to the NSE Windows Family!


Because we offer one of the highest quality replacement windows and doors in the industry, we can offer the same caliber warranty.

NSE Windows installs, services and guarantees our windows and workmanship. Any needs that you have can be answered by calling just one number.

We stock parts from windows in the off chance you may need them.

No extended warranties or additional contracts to purchase. You automatically get the industry’s strongest replacement window warranty at no extra cost to you when you purchase your NSE Windows.

Prompt, courteous service is always available to address any of your needs or questions. Labor and Service:

Labor and Service on all windows, doors, screens, and other products is warranted to be covered for five years from date of installation. This warranty applies to original purchaser. After five years, a trip charge and labor charge at prevailing rates will apply to work on the products not reimbursable by the window manufacturer.

This warranty can be transferred one (1) time to a subsequent owner. The additional warranty period will be one year from the date of the sale of the property to the next owner. The original purchaser must notify NSE Windows of the date of the property sale and the new homeowner’s name within 30 days of the sale date.


Fill out the form below and NSE Windows LLC will be in touch with you. We serve Long Island, New York and you can visit areas we serve for more information.

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