20 Best Window Companies in Mount Sinai, NY (2023 Reviews)
When it's time to upgrade your windows, our list of the top window installation companies can help you find the provider for you.
We analyzed all the top-rated window companies in Mount Sinai and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
Whether you're doing renovations or have old windows, windows play a important role in conserving your home's electricity. The Department of Energy estimates that heat or cool air lost through traditional or outdated windows could make up nearly 30% of heating and cooling costs. In Mount Sinai, where the energy bills are an average of $30 per month, that's almost $$107 per year wasted.
Installing energy-efficient windows on your property can help you save money every month on your power bills — and you can help the environment, too.
Because windows are so important for your home, picking the best company for you is a big choice to make. That's why the EcoWatch team has put together this list of the top window installation companies, so you can make an informed decision more easily.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Mount Sinai
The EcoWatch team researched dozens of installers in Mount Sinai to find the top window installation companies for our readers. The companies mentioned in this article passed our review standards for energy-efficient offerings as well as price, local expertise, customer service and beyond.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World has windows expertise in Mount Sinai. This company has 27 years of experience in the windows business, and it has proved to be one of the best companies in Mount Sinai. Its reputation is backed by hundreds of positive reviews on customer review websites.
It is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsWindow World’s commitment to sustainability shows in its energy-efficient window offerings. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.
How much does Window World cost in Mount Sinai?Window World does not list prices on its website, but it's known for offering some of the most affordable window installations around. The best way to know for sure is to receive a free quote from the company.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen has the best availability in Mount Sinai. This company has 27 years of experience in the windows business, and it has proved to be one of the best companies in Mount Sinai. Its reputation is backed by hundreds of positive reviews on customer review websites.
It uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen’s commitment to sustainability shows in its energy-efficient window offerings. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.
How much does Renewal by Andersen cost in Mount Sinai?Andersen does not list prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to know for sure is to receive a free quote from the company.

Universal Windows Direct
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Makes charitable contributions
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Manufactures products in-house
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Wide variety of products and services
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Lifetime warranty
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Limited service area
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Some installations carried out by third-party contractors
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Quality of service will depend on your area
Universal Windows Direct is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has been in the window industry for around 20 years. Hundreds of positive reviews on customer review websites back the company's reputation.
You may want to consider opting for Universal if you're interested in a installer that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThe company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products. Not all of Universal’s offerings are Energy Star certified, so make sure you mention that you want Energy Star windows when inquiring.
How much does Universal Windows Direct cost in Mount Sinai?Pricing information is not available on Universal’s website because the cost of window replacement depends on how many and what type(s) of windows you need. However, installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. If you’d like more accurate information, you can request a quote on the company’s website.
We've recommended installers with shining reputations, but keep in mind some national companies have independently owned locations in Mount Sinai, so the quality of service may depend on your local crew. We have tried to remain unbiased and transparent by listing pros and cons for every company reviewed.
More Window Companies in Mount Sinai
Renewal by Andersen of Long Island
Farmingdale, NY-
Free assessment
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Residential Windows
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Custom Window Designs
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Double-Hung
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Bay Windows
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Commercial Windows
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Window Replacement
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Stained Glass
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Sliding Glass
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Glass Showers
Window World of Long Island
Farmingdale, NY-
Good Customer Service
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Educational Website
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Price Transparency
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Timely Service
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Free assessment
Services Offered
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Double-Hung
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Tempered Glass
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Custom Window Designs
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Window Replacement
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Sliding Glass
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Fast Delivery
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Bay Windows
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Stained Glass
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Glass Showers
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Commercial Windows
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Residential Windows
Window Nation
Wallingford, CT-
Good Customer Service
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Educational Website
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Price Transparency
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Free assessment
Services Offered
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Sliding Glass
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Custom Window Designs
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Double-Hung
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Bay Windows
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Stained Glass
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Residential Windows
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Window Replacement
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Energy-Efficient Options
Glass Doctor
Ronkonkoma, NY-
Price Transparency
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Good Customer Service
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Educational Website
Services Offered
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Full-Service Installations
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Commercial Windows
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Double-Hung
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Residential Windows
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Window Repair
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Sliding Glass
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Custom Window Designs
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Fast Delivery
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Glass Showers
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Window Replacement
All Pro Remodeling Corp
Mt Sinai, NY-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Window Replacement
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Sliding Glass
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Double-Hung
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Energy-Efficient Options
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Glass Showers
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Custom Window Designs
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Residential Windows
Sunview Enterprise Inc
Setauket- East Setauket, NY-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Double-Hung
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Full-Service Installations
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Window Replacement
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Bay Windows
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Energy-Efficient Options
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Residential Windows
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Custom Window Designs
Smithtown Window Replacement and Doors
Smithtown, NY-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Window Replacement
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Double-Hung
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Custom Window Designs
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Energy-Efficient Options
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Fast Delivery
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Glass Showers
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Commercial Windows
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Bay Windows
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Residential Windows
AT Home Remodeling Inc Holbrook N.Y. 11741
Holbrook, NY-
Free assessment
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Fast Delivery
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Aluminum Window Frames
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Double-Hung
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Custom Window Designs
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Residential Windows
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Window Replacement
Coram Glass & Mirror Inc
Ronkonkoma, NY-
Price Transparency
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Educational Website
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Free assessment
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Good Customer Service
Services Offered
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Fast Delivery
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Commercial Windows
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Residential Windows
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Glass Showers
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Window Replacement
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Custom Window Designs
Home Services at The Home Depot
South Setauket, NY-
Price Transparency
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Residential Windows
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Custom Window Designs
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Double-Hung
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Glass Showers
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Fast Delivery
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Commercial Windows
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Stained Glass
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Window Replacement
Flawless Glass & Mirror LLC
Holbrook, NY-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Window Repair
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Residential Windows
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Glass Showers
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Custom Window Designs
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Window Replacement
Four Seasons Sunrooms
Holbrook, NY-
Good Customer Service
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Free assessment
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Price Transparency
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Educational Website
Services Offered
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Residential Windows
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Commercial Windows
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Custom Window Designs
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Energy-Efficient Options
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Window Replacement
EcoView Windows of Long Island
Islandia, NY-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Custom Window Designs
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Double-Hung
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Window Replacement
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Sliding Glass
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Residential Windows
Patchogue Window Installation
Brookhaven, NY-
Good Customer Service
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Price Transparency
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Educational Website
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Free assessment
Services Offered
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Stained Glass
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Fast Delivery
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Energy-Efficient Options
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Bay Windows
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Commercial Windows
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Sliding Glass
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Custom Window Designs
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Window Replacement
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Double-Hung
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Residential Windows
Home Comfort Practice, Inc.
Stratford, CT-
Timely Service
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Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Energy-Efficient Options
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Glass Showers
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Window Replacement
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Residential Windows
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Custom Window Designs
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Commercial Windows
Long Island Window & Door Ltd
Commack, NY-
Price Transparency
Services Offered
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Window Replacement
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Window Repair
Ener-G Tech, Inc.
Stratford, CT-
Price Transparency
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Custom Window Designs
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Glass Showers
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Energy-Efficient Options
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Commercial Windows
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Window Replacement
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Residential Windows
Fancy House, LLC
Stratford, CT-
Educational Website
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Timely Service
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Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Window Replacement
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Sliding Glass
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Custom Window Designs
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Glass Showers
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Fast Delivery
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Residential Windows
Standard Glass
Bridgeport, CT-
Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Window Replacement
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Fast Delivery
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Double-Hung
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Residential Windows
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Custom Window Designs
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Window Repair
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Commercial Windows
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Glass Showers
New York Glass And StoreFront
Huntington Station, NY-
Good Customer Service
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Free assessment
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Price Transparency
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Timely Service
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Educational Website
Services Offered
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Double-Hung
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Aluminum Window Frames
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Custom Window Designs
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Window Repair
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Commercial Windows
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Glass Showers
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Sliding Glass
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Window Replacement
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Residential Windows
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Tempered Glass
Calculate how much you can expect to pay for window installation and replacement in Mount Sinai, NY using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in Mount Sinai Saves You Money
There are quite a few benefits of upgrading to energy-efficient windows. A few reasons you may want to consider making the change are the following:
- More efficient energy usage in your household: Because the winters can get very cold in Mount Sinai, homeowners usually depend on their heater during that time. Energy-efficient windows cut back on the amount of heat that is lost through your windows, making it easier to keep your house warm.
- Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
- Decrease your carbon footprint: By using less energy once you upgrade to Energy Star certified windows, you'll also be cutting your indirect greenhouse gas emissions by about 12%, according to Energy Star.
- Better temperature control in your home: When you reside in a place like Mount Sinai where the summers can get quite hot, you often need to rely on your air conditioner to keep your house cool. Energy-efficient windows can lower how much cool air is lost through your windows when cooling your home.
Estimated Cost of Window Replacement in Mount Sinai
When looking into window installation, each company provides varying services and prices. Let's take a look at some typical costs and services.
How Much Do New Windows Cost?
Though the national average to install one window is around $600, it can range from $200 to $1,200. But costs vary remarkably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also offer door replacements, which will make your project cost more.
It's important to keep in mind that windows with the best efficiency may cost more upfront but can save you hundreds of dollars by decreasing your energy bills. Investing in Energy Star certified windows can save Mount Sinai homeowners $215+ a year when replacing single-pane windows.
We recommend requesting free quotes from multiple window companies to find the one that works best for you.
What Services do Window Installers Offer?
There are typically two kinds of window installation services: full-frame and pocket installations.
A full-frame installation replaces the entire window, including the windowsill, frame, trim and the window panes. As this kind of installation is more involved, it will be more expensive than a pocket installation. Pocket installations (or retrofits) entail installing a new window within the existing frame, which makes pocket installations more simple and affordable. However, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.
If you're still debating which type of installation you need, you can talk to your installer and get their recommendation. The decision mostly is influenced by the age of your window frames and if there's any damage present.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Mount Sinai
EcoWatch reviews differ from most reviews, as we look at these companies through a sustainability lens. We've decided to assess the top window installation companies in Mount Sinai mainly based on their energy efficient offerings, as it's the most sustainable option and the best one for homeowners. Energy Star certified windows can reduce your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
Because this is a guide for Mount Sinai, we paid more attention to companies that serve the city. There are certainly other reputable providers that didn't make the list because they wouldn't be able to serve homeowners in Mount Sinai.
Work Quality
We're willing to bet that you're not looking for a company to do a shoddy job installing windows. We've vetted each company included in our guide to make sure its contractors are well-qualified and that the company has gotten a lot of positive customer feedback to vouch for its service.
Customer Reviews
Customer feedback is another very important review factor. If most customers don't have good feedback about their service from a certain window installation company, you won't see it featured on EcoWatch.
Cost
Cheaper windows don't necessarily mean better windows, but we know many of our readers try to keep costs as low as possible. When analyzing the prices of providers, we gave higher points to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
As discussed, windows are a hefty investment, so you'll want to be certain that investment is well protected. Window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Due to Mount Sinai's climate, homeowners need to be wary of low efficiency, rot and water damage. We factored in local experience to reflect the ability of Mount Sinai window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Mount Sinai, NY Window Replacement FAQs
What is the typical cost to replace windows in a home?
The average cost of installing a single window can range between $450 and $650. There are several factors that influence how much it costs, which include the number of windows, your property's location, local labor costs, how energy-efficient the windows are, styles and sizes of windows and the materials used in designing the windows.
Which kind of window should I get?
A window's energy efficiency is influenced by a number of factors, including the quality of the installation and what kind of window it is. Look for Energy Star Certified windows — these are often the most energy-efficient and are certified by the U.S. Department of Energy.
Can I install my own windows?
If you're handy and have the time and patience to do the job right, you may be able to install your own windows. But if you don't have the time or experience, we recommend hiring a professional.
How long does window installation typically take?
Because the average installation time of a window is 30 minutes, around 16 windows can be installed during an 8-hour work day.
When is the best time of year to replace windows?
Replacement windows can be installed at any time, but autumn might be the best season. Regardless of when you install them, the contractors will take steps to ensure that too much hot or cold air doesn't get into your home, so the temperature outside doesn't necessarily matter that much. What's most important is that the weather should be dry.