Our Expert Window Replacement Services in Suffolk County, NY

At Decks By Decker Home Improvements, we provide expert window replacement in Suffolk County, NY that enhances your home’s energy efficiency, comfort, and curb appeal. Whether you’re upgrading outdated windows, dealing with drafts, or planning a full exterior renovation, we bring over 15 years of experience and a commitment to precision craftsmanship to every project.

What Our Window Replacement Services Include

Windows are more than just glass—they’re a critical part of your home’s insulation, ventilation, and aesthetic. At Decks By Decker, we offer full-service window replacement tailored to your home’s style, energy goals, and budget.

Our services include:

Energy-Efficient Windows (Double & Triple Pane)
Vinyl Window Installation
Double-Hung & Casement Window Options
Bay & Bow Window Replacement
Sliding Glass Windows & Patio Doors
Custom Window Designs & Sizing
Storm Window Upgrades
Window Frame Repair & Reinforcement
Window Trim Installation & Finishing
Full Removal & Disposal of Old Windows

Whether you’re replacing a single drafty window or upgrading your entire home, we’ll help you choose the right materials and styles for lasting performance and beauty.

Benefits of Window Replacement in Suffolk County

Lower Energy Costs

Energy-efficient windows help reduce heat loss in winter and block UV rays in summer—keeping your home comfortable while saving on utility bills year-round.

Improved Home Comfort

Enjoy a draft-free, condensation-free environment with stable indoor temperatures—modern windows improve the feel of every room in your home.

Noise & Maintenance Relief

Double-pane windows reduce outdoor noise, while vinyl and composite frames stay clean and strong—no painting, peeling, or warping over time.

Boosted Curb Appeal

New windows instantly enhance your home's exterior with sleek frames, fresh finishes, and improved resale value thanks to better style and performance.

Why Choose Decks By Decker

Local Expertise in Suffolk County: We understand the building codes, weather patterns, and design preferences unique to Suffolk County.
15+ Years of Experience: Our team has installed thousands of windows across Long Island with consistent 5-star results.
Premium Products: We install trusted brands known for durability, energy efficiency, and warranty support.
Clean, Professional Workmanship: We protect your home during installation and leave your space spotless when we’re done.

Happy Clients

200 +

Our Window Replacement Process

On-Site Assessment

We inspect your current windows, identify problem areas, and discuss your goals for energy savings, ventilation, and aesthetics.

STEP 1

Design & Selection

We help you choose window styles, frame materials, glass options, and trim details that match your home and budget.

STEP 2

Removal & Preparation

We carefully remove old windows, repair or reinforce frames as needed, and prep the openings for a perfect fit.

STEP 3

Installation & Finishing

Our crew installs your new windows with precision, seals all gaps, and finishes with trim and caulking for a clean, weatherproof result.

STEP 4

Gallery

Take a look at some of our window replacement work in Suffolk County

Customer Reviews

Hear what some of our clients in Suffolk County have to say

      EXCELLENT  
   Based on 35 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   David Goldstein 
 
 
 
 Trustindex verifies that the original source of the review is Google. Just finished our fourth deck project with Decks by Decker and  again we are 100% satisfied
Sean and the crew were great, completed the job as promised  left the area spotless and were amazing to deal with.  Definitely give them a call.
  
 
      Posted on Google  
   
   Elaine James 
 
 
 
 Trustindex verifies that the original source of the review is Google. WE RECENTLY HAD OUR DECKS REDONE BY DECKS BY DECKER.
WE ARE VERY PLEASED WITH THE QUALITY OF WORK THAT WAS DONE. THE WORKERS WERE VERY POLITE AND DIDN'T LEAVE A MESS AT ALL. WE WOULD HIGHLY RECOMMEND THEM FOR ANY
PROJECT YOU MAY NEED DONE!
  
 
      Posted on Google  
   
   Kathy Fratello 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had a front porch and a large deck done by Decks By Decker. Both are beautiful! Sean is a pleasure to work with. He listens to what you want then makes excellent suggestions based on his expertise. Sean pays attention to every detail and is always available to answer any questions or concerns. His crew are professional and true craftsman.
  
 
      Posted on Google  
   
   Kelly Mehr 
 
 
 
 Trustindex verifies that the original source of the review is Google. We absolutely love our new steps! Sean Decker and his team did an amazing job. He fit us into the schedule so quickly and was a pleasure to work with. Our steps are now safe and look great!
  
 
      Posted on Google  
   
   Matthew Fratello 
 
 
 
 Trustindex verifies that the original source of the review is Google. Sean & his crew replaced my front door and porch. Sean was honest and kept me up to date and was always responsive to any questions I had.  I could not have been happier with the work that was done. I highly  recommend. Thank You Sean and Crew.
  
 
      Posted on Google  
   
   Bill Etzel 
 
 
 
 Trustindex verifies that the original source of the review is Google. Sean (and his crew) go above and beyond every time I've used them. Work is meticulous and precise. Clean up is outstanding. His "can-do" attitude is infectious. Will use his services every time  !
  
 
      Posted on Google  
   
   F Decker 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had Sean install a much needed handrail on our back stoop.  We didn’t want wood because we didn’t want to have to paint it.  Sean suggested Trex and we had a nice selection of colors and styles.  After 2 days, Sean completed the project and it was beautiful!  We were surprised how it changed the whole look of the back of the house.  It really has enhanced the look of our craftsman home.  We are very satisfied with Sean’s design ideas, suggestions, work ethic, meticulous workmanship all at a reasonable cost.  We will be calling Sean back for our other planned projects.
  
 
      Posted on Google  
   
   Wayne Bellucci 
 
 
 
 Trustindex verifies that the original source of the review is Google. Words cannot begin to express how happy we are with our new front porch.  We have done several large home renovations in the past year, Sean Decker and his team were by far the most professional and enjoyable to work with.  Sean is professional, punctual, courteous and an excellent communicator.  His attention to the details and finishings were above and beyond. The porch was completed ahead of schedule.   My only regret is not knowing about him sooner!   If you are looking for home improvements or decking, Decks by Decker is the company to contact.  You will NOT regret it.
  
 
      Posted on Google  
   
   Nicole Hayes 
 
 
 
 Trustindex verifies that the original source of the review is Google. Decker and his crew did a phenomenal job on our deck! Their work completely exceeded our expectations. We met Decker for an estimate a year ago for this project. But based alone on his professionalism, honesty, expertise and innovative ideas we immediately recommended him to my mother for a deck project which is just another glowing review. Fast forward a year later when we were ready to get started, Decker was considerate of our budget, honored the timeline and was responsive throughout the whole process. He arrived with his crew on time everyday until the job was done and they finished 2 days early! We are so grateful for their hard work and attention to detail. They went above and beyond to truly make sure we would enjoy the deck by doing a great job cleaning up and even taking a HUGE pile of broken fences that was near the deck to the dump for us!!! We honestly couldn’t be happier and look forward to more projects with Decker!
  
 
      Posted on Google  
   
   Patricia Martinez 
 
 
 
 Trustindex verifies that the original source of the review is Google. Sean and his crew built a beautiful deck, we were very pleased how it turned out. They were always respectful of our property and cleaned up every day they were done. When the deck was completed they  even washed down the entire deck. Sean was  professional and always responded to my texts or calls. If you need a deck call him, you will be very pleased.

Frequently Asked Questions

How do I know if I need new windows?

Signs include drafts, condensation between panes, difficulty opening or closing, and rising energy bills. If your windows are over 20 years old or visibly damaged, it’s likely time to replace them.

What types of windows do you install?

We install double-hung, casement, bay, bow, sliding, and custom windows in vinyl, composite, and fiberglass frames. We’ll help you choose the best fit for your home’s architecture and energy goals.

Are your windows energy-efficient?

Yes. We install ENERGY STAR® rated windows with low-E coatings, argon gas fills, and insulated frames to maximize efficiency and comfort.

How long does window replacement take?

Most projects take 1–3 days depending on the number of windows and complexity. We provide a clear timeline before starting and keep you informed throughout the process.

Do you handle window trim and finishing?

Absolutely. We install interior and exterior trim, caulking, and flashing to ensure a clean, weatherproof finish.

Can you match my existing window style?

Yes. We offer a wide range of styles and finishes to match your home’s current look—or help you upgrade to something more modern.

What’s the cost of window replacement in Suffolk County?

Costs vary based on window type, size, and materials. A standard vinyl window may start around $600–$800 installed, while bay or custom windows can exceed $2,000. We provide detailed, transparent estimates.

Do you offer warranties?

Yes. We offer labor warranties and honor all manufacturer warranties on windows and components. We’ll review all terms with you before installation.

Contact Form Ready to upgrade your windows?

Contact Decks By Decker today for a free window replacement consultation. We offer fast response times, honest pricing, and expert craftsmanship you can trust.