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*The Angi rating for Window And Door Contracting companies in Islip, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
*The HomeAdvisor rating for Window And Door Contracting companies in Islip, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
Last update on December 15, 2025
Find Window and door contractors in Islip
VELUX America
VELUX America
Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.
Start with skylights! At VELUX, our mission is clear: we're dedicated to transforming your space with natural light and fresh air with skylights. Whether you're looking to replace old skylights or install brand-new ones, we will guide you every step of the way. Why Choose VELUX? =================== When it comes to skylights and roof windows, VELUX is the global leader. Here's why you should trust us to transform your home: 1. Innovation and Quality: VELUX skylights are renowned for their innovation and unmatched quality. They're designed to let in abundant natural light while keeping your space leak-free and energy-efficient. 2. Huge Product Selection: You’ll have access to a wide range of skylight options, from fixed to vented skylights. And we are here to help tailor the selection to suit your specific needs and style preferences. 3. Expertise: We take pride in what we do at VELUX, and our team is highly trained to guide you through the entire process. From selecting the perfect product for your space to providing valuable recommendations, we're committed to making sure your skylight project is a complete success. 4. Professional Installation Partners: We don't stop at product selection and recommendations; we also match you with a VELUX-trained installer who will handle the installation of your skylights with precision and expertise.

Long Hill Masonry Corp
Long Hill Masonry Corp
**We have now expanded our Foundation Services**Long Hill Masonry has been providing a tradition of expert craftsmanship, quality and service for over 30 years. The company is owned and operated by Joseph Tavella, who himself comes from generations of masons. It is our goal to achieve the highest standard of quality in every project. We guarantee our workmanship for one full year, and most projects are payable upon completion of job take a look at our website at www.longhillmasonry.com
"Joe Cam down to do an estimate and he was very knowledgeable. The Quote was Fair and I had hired them to do the job. They came on time and the job came out great. I would recommend Long Hill to everyone I know"
Christian G on August 2023
**We have now expanded our Foundation Services**Long Hill Masonry has been providing a tradition of expert craftsmanship, quality and service for over 30 years. The company is owned and operated by Joseph Tavella, who himself comes from generations of masons. It is our goal to achieve the highest standard of quality in every project. We guarantee our workmanship for one full year, and most projects are payable upon completion of job take a look at our website at www.longhillmasonry.com
"Joe Cam down to do an estimate and he was very knowledgeable. The Quote was Fair and I had hired them to do the job. They came on time and the job came out great. I would recommend Long Hill to everyone I know"
Christian G on August 2023

The Door Guy of LI LLC
The Door Guy of LI LLC
At the Door Guy, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.
"Had the pleasure of having Sal install and replace 3 exterior doors and 2 storm doors. Very detailed, skilled, knowledgeable and professional with his craft. Will continue to use his service and recommend to others. "
Aundre K on December 2025
At the Door Guy, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.
"Had the pleasure of having Sal install and replace 3 exterior doors and 2 storm doors. Very detailed, skilled, knowledgeable and professional with his craft. Will continue to use his service and recommend to others. "
Aundre K on December 2025

Renewal by Andersen
Renewal by Andersen
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
" Renewal by Andersen of Wyoming did an incredible job with installing windows in our home. Thank you to the team who did the install and to the company for creating these exceptional windows."
Janita K on December 2025
Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation
" Renewal by Andersen of Wyoming did an incredible job with installing windows in our home. Thank you to the team who did the install and to the company for creating these exceptional windows."
Janita K on December 2025

Brown Property Services
Brown Property Services
Hi I'm Tom, I do all of the work in this business, and only bring on helpers when necessary. I aim to offer as much "value" as possible, meaning bang for your buck. Great work, at reasonable prices that make sense and are clearly explained in estimates and quotes. What you want your project to look like in the end is completely up to you. I will make sure it is done properly!
"Tom has installed lighting fixtures, hung closet poles and other jobs around my home. He is easy to work with and completes all jobs with ease and efficiency! I highly recommend Tom . "
Karen D on October 2025
Hi I'm Tom, I do all of the work in this business, and only bring on helpers when necessary. I aim to offer as much "value" as possible, meaning bang for your buck. Great work, at reasonable prices that make sense and are clearly explained in estimates and quotes. What you want your project to look like in the end is completely up to you. I will make sure it is done properly!
"Tom has installed lighting fixtures, hung closet poles and other jobs around my home. He is easy to work with and completes all jobs with ease and efficiency! I highly recommend Tom . "
Karen D on October 2025

Carlos Home Improvement
Carlos Home Improvement
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.
CAC Carpentry Art & Craft
CAC Carpentry Art & Craft
CAC carpentry Art & Craft is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 25 years of experience serving Greenwich, CT and surrounding areas. Call today and let us put our experience to work for you!
CAC carpentry Art & Craft is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 25 years of experience serving Greenwich, CT and surrounding areas. Call today and let us put our experience to work for you!
Aligned Home Improvement LLC
Aligned Home Improvement LLC
Licensed & Insured, Veteran owned. I stand by honesty and integrity! I always make sure my customers are 100% satisfied with the work. Communication is key to success and I'll always make myself available for any questions or concerns. I love what I do and take pride in my work. I started my own company slowly building clients and business relationships. I look forward to meeting new people and providing the Best home Improvements possible : )
"Dan was friendly, knowledgable, and professoliomal. He and his team recommended different options to my project which was helpful. He was ontime arriving at my home and cleaned up the work area when completed. I would use his services again and recomemend him to anyone needing contractor services."
Tom P on March 2024
Licensed & Insured, Veteran owned. I stand by honesty and integrity! I always make sure my customers are 100% satisfied with the work. Communication is key to success and I'll always make myself available for any questions or concerns. I love what I do and take pride in my work. I started my own company slowly building clients and business relationships. I look forward to meeting new people and providing the Best home Improvements possible : )
"Dan was friendly, knowledgable, and professoliomal. He and his team recommended different options to my project which was helpful. He was ontime arriving at my home and cleaned up the work area when completed. I would use his services again and recomemend him to anyone needing contractor services."
Tom P on March 2024

FG Window Repair Service
FG Window Repair Service
At FG Window Repair Service, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"This company came to replace the glass in a double pane bay window because the gas seal round it leaked and was unable to see through it. The glass was replaced, paid $600 for the new glass. A month or so after the installation there was condensation build up inside the double glass. Callled the company, and was told they would correct the problem, if not able to they would refund our $600. Needless to say we had gotten every excuse and then weâ re told they donâ t remember doing a job at my home !! Never got a $$ back either.. But I would like to know if they were never hear at all, then why is there a picture of the front of my home on their website as soon as you download it, and the same picture on their photo gallery of work they have done?? I have filed with the Suffolk County Dept of Consumer Affairs !! FG Window Repair had and has avoided out calls to them !"
Trisha R on February 2023
At FG Window Repair Service, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"This company came to replace the glass in a double pane bay window because the gas seal round it leaked and was unable to see through it. The glass was replaced, paid $600 for the new glass. A month or so after the installation there was condensation build up inside the double glass. Callled the company, and was told they would correct the problem, if not able to they would refund our $600. Needless to say we had gotten every excuse and then weâ re told they donâ t remember doing a job at my home !! Never got a $$ back either.. But I would like to know if they were never hear at all, then why is there a picture of the front of my home on their website as soon as you download it, and the same picture on their photo gallery of work they have done?? I have filed with the Suffolk County Dept of Consumer Affairs !! FG Window Repair had and has avoided out calls to them !"
Trisha R on February 2023
Grady's Painting Plastering/Construction
Grady's Painting Plastering/Construction
WE SPECIALIZE IN THE HISTORICAL REPAIR AND RESTORATIONS FOR INTERIOR AND EXTERIOR. WE WORK THE WHOLE STATE OF NEW JERSEY, MARYLAND, WASHINGTON DC, CONNECTICUT, VIRGINA AND MASSACHUSETTS. WE ARE LICENSED AND INSURED IN ALL STATES. WE ARE WILLING TO TRAVEL, ANY JOB SMALL OR LARGE. CONSULTATION AND TRANSPORTATION FEES WILL APPLY. WE DO WINDOW REPAIR. PLASTER REPAIRS. AND ALL MASONRY REPAIRS
"We had cracks in the dyed mortar of the bricks above our garage. Grady took the time to match the color, even with the color having aged 10 years, and you would not even be able to tell that there was new mortar. If your project is anything like ours, you will not be disappointed."
Bradley S on August 2024
WE SPECIALIZE IN THE HISTORICAL REPAIR AND RESTORATIONS FOR INTERIOR AND EXTERIOR. WE WORK THE WHOLE STATE OF NEW JERSEY, MARYLAND, WASHINGTON DC, CONNECTICUT, VIRGINA AND MASSACHUSETTS. WE ARE LICENSED AND INSURED IN ALL STATES. WE ARE WILLING TO TRAVEL, ANY JOB SMALL OR LARGE. CONSULTATION AND TRANSPORTATION FEES WILL APPLY. WE DO WINDOW REPAIR. PLASTER REPAIRS. AND ALL MASONRY REPAIRS
"We had cracks in the dyed mortar of the bricks above our garage. Grady took the time to match the color, even with the color having aged 10 years, and you would not even be able to tell that there was new mortar. If your project is anything like ours, you will not be disappointed."
Bradley S on August 2024
FAQs for window and door contracting projects in Islip, NY
Door installation usually takes three and four hours, including removing the old door and frame, fitting the new door and frame in place, shimming it to make sure it’s perfectly level, and making adjustments to the hinges and locking mechanisms to ensure proper functionality. A door-hanging professional can replace an interior door in between one and two hours. Door installation will take significantly longer if your installer needs to create a wall opening, and it can take less time if the existing door frame remains.
If you have a problem with your window, such as broken glass, minor leaks, or a problem with your window being stuck, repairing the broken part might be a cheaper option than replacing the entire window. However, if you have a deteriorating window frame or major leaks, buying a new window will be the better long-term solution.
The average cost to install a door is around $1,100, but you could pay anywhere from $150 for a hollow-core interior door installation up to $2,000 or a high-end exterior door installation. There are a few cost factors to consider to get an accurate price, including whether your wall opening exists, the type of door, the quality and security of the door, whether you need to replace the frame, and the door size. You can expect to pay $150 to $700 for a standard 36-by-80-inch door and between $400 and $1,600 for an 80-by-48-inch door.
Window replacement costs between $180 and $410 per window, or an average of $280 per window. However, your specific replacement job could cost as little as $100 or as much as $750. Factors such as frame material, the number of windows you need, and the type of glass you order all impact the overall cost. For example, simple double-glazed windows will cost $3 to $6 per square foot, but the stronger tempered glass ranges from $12 to $14 per square foot.
It’s possible to install a door yourself if the wall opening already exists, but the work is rather complicated, and a professional installation is usually well worth the investment. For your door to work and close properly, you’ll need to shim and level the door frame in your wall perfectly, which can be difficult. Additionally, we recommend you always hire a professional door installer to place an exterior door, as mistakes during the installation process can lead to poor security for your home.
The Islip, NY homeowners’ guide to window and door contracting services
From average costs to expert advice, get all the answers you need to get your job done.

Door repairs cost around $250 on average but can range from $50 to $700 depending on the type of door, type of repair, materials, and project scope.

The frame is a crucial part of a door’s looks and proper functioning. Here’s how much you can expect to pay to replace a door frame in your home.

When adding a fresh new entryway to your home, you may be curious about the cost of sliding glass doors. Let's break it down by size, style, and design.

If you’re new to an inclement-weather-prone area, it might be time to learn how to install a storm door. Explore our straightforward eight-step guide here.

Patio doors do more than just open to your outdoor space. Learn how the type of door you choose impacts the lighting, airflow, and atmosphere of your home.

Screen and storm doors offer protection and allow more natural light into your home. Uncover the critical differences between storm doors and screen doors.
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