*The Angi rating for Window Service 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 Service needs.
*The HomeAdvisor rating for Window Service 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 Service needs.
Last update on April 13, 2026
Serving Islip, NY and surrounding areas
Approved
Super Service Award Winner
In business since 2020
Free estimates
Warranties offered
"Very pleased. Great service. My new windows are beautiful. Highly recommend."
+11
Serving Islip, NY and surrounding areas
Approved
In business since 1966
Free estimates
Emergency services offered
"They addressed all of my concerns without hesitation and to my satisfaction. They gave me a fair price. I thought the workers were experienced and had a good technique of capping the windows to prevent water leakage. They exceeded my expectations."
+42
Serving Islip, NY and surrounding areas
Approved
In business since 1985
Free estimates
Emergency services offered
"Aaron, Bob, and the Thermoseal team were terrific to work with. Aaron, the owner, was friendly and patient as he helped us understand the various siding, insulation, and window options. Bob and the install team did a perfect job, from addressing some unexpected aspects of set-up through to a thorough clean-up job. The acoustical windows are the best home investment we've made yet. A+ work that comes with my highest recommendation."
+29
Serving Islip, NY and surrounding areas
Approved
In business since 2010
Free estimates
Credit card accepted
"I had a through the wall air conditioner removed and the wall patched. The work included dry wall, insulating, exterior siding and painting. Sheldon was professional and easy to work with. For a reasonable price be provided high quality work. I intend to worn with S & K again."
+7
Serving Islip, NY and surrounding areas
Approved
In business since 2000
Free estimates
Credit card accepted
"Angelo and his crew were excellent and did a great job with all my window replacements"
+29
Serving Islip, NY and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1992
Free estimates
Warranties offered
"Excellent workmanship and products I have had three installations with Power in the past two years. I first used them for a new roof and gutters. The workers were all knowledgeable in their area of work. Clean up was good although some nails kept showing up over time. Next I had the 2nd floor windows and some 1st floor windows replaced, 9 in total. Installation went well and they cleaned up beautifully afterwards. I love the windows! They are a beautiful and energy efficient product. Lastly, I recently had a bay window replaced in my kitchen with the same type window. The workers ere all friendly and explained what would be done. The area was draped with plastic to cut down on dust. Clean up was excellent inside and outside! The window is beautiful and the framing on the outside of the window matches the other windows and the small roof above the bay window was replaced with the same roofing as the rest of the house. I would choose them again for any future projects."
+24
Serving Islip, NY and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Prasann was the window expert I dealt with and he was very nice in explaining the whole home genius process and giving me a good price on my windows. We went with the fusion model for the windows and he showed up to the estimate with a mask very cover friendly."
+76
Serving Islip, NY and surrounding areas
Approved
Free estimates
"George did an excellent job! He was fast and efficient and kept constant communication on the project. My window was broke in pieces and George finished it with urgency and quality."
Serving Islip, NY and surrounding areas
Approved
In business since 1981
Free estimates
Warranties offered
**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
+180
Serving Islip, NY and surrounding areas
Approved
In business since 1988
Free estimates
Emergency services offered
King Quality Roofing and Siding is proud to be a locally owned and operated business that has been serving the community since 1988! With years of experience and unmatched expertise, we can help with any and all of your roofing and siding needs. Since opening our doors we have built our business on providing customers with the highest quality products and craftsmanship, at a fair price. You can count on our team to be timely, tidy, and when the job is done, that you will be 100% satisfied with the work completed. Let us show you the King Quality difference, get in touch today!
+1
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.
Window replacement can become costly, especially if you’re replacing your whole home. There are a few steps you can take to help save money on the bottom cost while still giving your windows a facelift.
Replace multiple windows at once to bundle your purchase
Inquire about discounts, coupons, or special offers
Consider window repair as soon as you see damage to help prevent the need for replacement
Maintain your windows often by inspecting your windows for drafts, leaks, and cracks
There are certain window repairs that are cost-effective to DIY and relatively simple for homeowners to tackle themselves. Tasks like replacing a screen, replacing a lock, or sealing a window are typically under $30 and take minimal time to do yourself. However, if you need to replace your window or repair a broken double pane, it’s best to call in a professional window replacement installer to lend a hand. Replacing the majority or all of the windows in your home is a time consuming job and best left to a professional.
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.
The time it takes to replace a window is a total of four to 15 weeks. This time includes your initial consultation, appointments for measuring, as well as ordering and manufacturing your windows. For a smaller job, you can expect the total timeline to be on the shorter end, but for a whole house window replacement, it might take longer (or be split into multiple install appointments). Once your windows are created and ready to be installed, your window installer will take 30 to 60 minutes per window to install.
From average costs to expert advice, get all the answers you need to get your job done.
The cost of new windows heavily depends on their size, but other factors come into play as well. This guide breaks down window costs based on various factors so you can make an informed budget for this project.
Find out how much it costs to install vinyl windows in a single room or throughout your house—and see how the size and style of the windows impact the overall price.
A new arched window can boost curb appeal, home value, and energy efficiency. Learn how much arched windows cost and what factors to consider.
Condensation on windows is a sign of failed seals in the window and a loss of energy efficiency. Learn how to fix foggy windows using one of four options.
Knowing how to insulate windows can keep you cool in the summer and warm in the winter. Suffice to say, it’s an important skill to have. Learn more here.
What are low-E windows? Read this guide to find out and learn how they can improve your home’s energy efficiency—or if you’re better off with an alternative.
