25 Best Window Replacement Companies in Greenwich, CT (2023 Reviews)
Window Companies Near Me
If you're thinking about upgrading to new windows, our guide to the top window installation companies can help.
We analyzed all the top window installers in Greenwich and selected the top 25 based on:
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Customer reviews
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Window replacement expertise
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Popularity with home-owners like you
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Updated May 04, 2023
Why you can trust EcoWatch
Whether you're doing home renovations or have old windows, windows play a vital role in conserving electricity in your home. Drafty windows can make your home uncomfortable in the summer or winter.
That's not great for your bank account or the environment, but one of the best window installation companies can help with that.
Unlike other sites, EcoWatch ranks window companies on energy efficiency while also taking into consideration cost, customer satisfaction and service area.
Best Affordability
Window World
- Large serice area
- Great industry reputation
- Lifetime warranty
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
- No lifetime warranty
Best for Residential Windows
Window Nation
- Wide variety of products and services
- Custom designs
- Manufactures products in-house
- Installation not covered by warranty
Best Window Replacement Companies in Greenwich
The EcoWatch team researched dozens of providers that service the Greenwich area to find the best window installation companies that fit our standards. The companies in this article passed our review standards for energy-efficient offerings as well as customer service, local expertise, price and beyond.

Window World
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Large serice area
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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 offers windows expertise in Greenwich. Window World has about 27 years of experience in the window replacement business. Hundreds of positive reviews on customer review websites back the company's reputation.
You may want to consider opting for Window World if you're looking for a installer that 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 offers some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality Energy Star windows when inquiring. 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 Greenwich?Prices aren't listed on Window World's website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to get a free quote from the company.

Renewal by Andersen
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Great industry reputation
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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
Renewal by Andersen offers the best availability in Greenwich. Andersen has been in the window industry for about 27 years. Its reputation is backed by hundreds of positive reviews from customers online.
It has established itself as a company that 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 caters to eco-conscious consumers by providing 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 Greenwich?Andersen does not detail 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. You can inquire about a free quote on its website for more information about the cost.

Window Nation
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Wide variety of products and services
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Custom designs
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Manufactures products in-house
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Installation not covered by warranty
Window Nation has the best residential windows in Greenwich. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has been in the window business for around 16 years. Its reputation is backed by several positive reviews from customers online.
You may want to consider going with Window Nation if you're looking for a installer that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.
Energy Efficiency of Window Nation WindowsWindow Nation offers some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for high-quality Energy Star windows when inquiring. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.
How much does Window Nation cost in Greenwich?Prices are not available on Window Nation's website, as the cost of window replacement depends on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. If you'd like to know for sure, you can ask for a quote on the company's website.

Aeroseal Windows
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Many years of experience
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Great industry reputation
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Low number of customer complaints
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Manufactures products in-house
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Custom Designs
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No lifetime warranty
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Not ideal for residential installations
Aeroseal Windows offers the best window installation for businesses in Greenwich. It's an installer that mainly serves commercial and multifamily properties, and also specializes in railings. If you’re looking for residential window installations, you should probably refer to one of the other companies on this list. This company has 23 years of experience in the windows industry, and it has proved to be one of the best companies in the business. Its reputation is backed by several positive reviews from customers online.
It has established itself as a company that installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows offers some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality Energy Star windows when inquiring. The company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more.
How much does Aeroseal Windows cost in Greenwich?Aeroseal does not list prices on its website, but it provides high-quality windows at a competitive price point. Requesting a free quote on its website is the best way to get more accurate pricing information.
We've recommended installers with good reputations, but note that these are national companies, so the quality of service may depend on your local crew. We have tried to be unbiased and transparent by mentioning pros and cons for each company reviewed.
More Window Replacement Companies in Greenwich
The Shade Store
Greenwich, CT-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Energy-Efficient Options
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Glass Showers
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Custom Window Designs
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Stained Glass
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Residential Windows
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Aluminum Window Frames
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Fast Delivery
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Commercial Windows
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Double-Hung
Window King LLC
Bronx, NY-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Glass Showers
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Fast Delivery
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Commercial Windows
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Double-Hung
Window World Westchester
Tuckahoe, NY-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Bay Windows
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Double-Hung
Pella Windows & Doors of Roslyn Heights
Roslyn Heights, NY-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Bay Windows
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
Window King of Connecticut
Stamford, CT-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Glass Showers
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Fast Delivery
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Commercial Windows
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Double-Hung
Sears Window Replacement
New Rochelle, NY-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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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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Bay Windows
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Sliding Glass
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Custom Window Designs
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Stained Glass
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Residential Windows
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Double-Hung
Alba European Windows & Doors
Bronx, NY-
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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Energy-Efficient Options
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Sliding Glass
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Custom Window Designs
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Stained Glass
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Residential Windows
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Aluminum Window Frames
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Fast Delivery
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Commercial Windows
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Double-Hung
Pella Windows & Doors of Norwalk
Norwalk, CT-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Bay Windows
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Commercial Windows
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Double-Hung
Glass Express Solutions LLC
Stamford, CT-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Glass Showers
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Tempered Glass
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Commercial Windows
Construction Company | Repair & Installation Services: Seamless Gutters, Roofing, Chimney, Skylight - RH RENOVATION LLC
Bronx, NY-
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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Glass Showers
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
American Windows Plus Inc
White Plains, NY-
Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Energy-Efficient Options
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
Rockland County Handyman llc
Congers, NY-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Commercial Windows
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Double-Hung
Giant Siding and Windows
White Plains, NY-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Sliding Glass
Pleasantville Glass & Mirror Inc.
Hawthorne, NY-
Good Customer Service
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Price Transparency
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Timely Service
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Free assessment
Services Offered
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Glass Showers
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Custom Window Designs
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Stained Glass
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Residential Windows
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Fast Delivery
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Tempered Glass
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Commercial Windows
Competition Glass
Port Washington, NY-
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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Full-Service Installations
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Residential Windows
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Fast Delivery
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Double-Hung
Unified Home Remodeling
Scarsdale, NY-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Commercial Windows
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Double-Hung
Fullam's Windows
Norwalk, 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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Glass Showers
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Fast Delivery
Westchester Window
Thornwood, NY-
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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Energy-Efficient Options
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Double-Hung
Klar Studio European Windows & Doors
Norwalk, CT-
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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Energy-Efficient Options
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Fast Delivery
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Commercial Windows
Windows By Toll
Stamford, CT-
Good Customer Service
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Award-Winning
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Glass Showers
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Residential Windows
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Custom Window Designs
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Double-Hung
Eqwipt Glass & Mirror
Glen Cove, NY-
Good Customer Service
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Award-Winning
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Glass Showers
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Commercial Windows
Village Glass LLC
Ridgefield, CT-
Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Glass Showers
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Sliding Glass
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Custom Window Designs
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Full-Service Installations
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Residential Windows
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Fast Delivery
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Tempered Glass
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Commercial Windows
Window Wall Weschester
Yonkers, NY-
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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Energy-Efficient Options
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Glass Showers
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Aluminum Window Frames
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Commercial Windows
Majestic Glass & Mirrors Llc
Larchmont, NY-
Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Glass Showers
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Commercial Windows
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Double-Hung
Dunlea Glass & Mirror | Installation and Repair of Westchester
Mt Vernon, NY-
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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Glass Showers
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Commercial Windows
How Installing Energy-Efficient Windows in Greenwich Saves You Money
There are several perks of upgrading to energy-efficient windows. Some reasons you may want to consider making the change include the following:
- Save money on power bills: Because energy-efficient windows decrease the amount of energy used to heat or cool your home, the switch can help you save about $441 annually on your energy bills in Greenwich.
- Protect your investment: When you have an older home, your windows could also be outdated or leaky. Upgrading your windows is an important part of maintaining your property and its real estate value.
- Reduce your carbon footprint: In Greenwich, you can reduce your indirect greenhouse gas emissions by about 147 pounds per year once you switch to energy-efficient windows.
- Protect your valuables from fading: When you switch to energy-efficient windows with low-emissivity coatings, your floors, carpets and furniture will fade less due to their ability to filter out damaging UV rays.
Estimated Cost of Window Replacement in Greenwich
Windows come in different shapes and sizes, so costs and services will vary greatly. Here are the typical costs and services that you can find from the average window installation company.
How Much Do New Windows Cost?
The typical cost to install a single window is about $600 but can range from $200 to $1,200. How much it will cost varies based on several factors, including the location of your home, size, number of windows, material, type and more.
Whether or not you want to install energy-efficient windows is another factor that will affect the cost. These will usually cost more than other windows, but on the other hand, you can save about $441 a year on your energy bills in Greenwich.
Asking for free quotes from multiple providers is the best way to find out which one will work best for your budget.
What Services do Window Installers Offer?
There are generally two types of window installation services: full-frame and pocket installations.
Full-frame installations are necessary when you want a new style or your window has significant rot or deterioration. With this service, your installers will replace the complete window, including the sill, trim and frame. A pocket installation entails replacing a window without replacing the frame. So, instead of tearing out the whole window and reinstalling it, the window installer will just put the replacement window (also called a retrofit or insert window) into the frame.
If you're still debating which type of installation you should get, you can ask 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 Affordability
Window World
- Large serice area
- Great industry reputation
- Lifetime warranty
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
- No lifetime warranty
Best for Residential Windows
Window Nation
- Wide variety of products and services
- Custom designs
- Manufactures products in-house
- Installation not covered by warranty
How We Choose the Best Window Installers in Greenwich
EcoWatch is different from other reviewers because we assess these companies through a sustainability lens. We have evaluated the best window installation companies in Greenwich mostly based on their energy efficient offerings, as the most sustainable option also benefits homeowners in many ways. Energy Star certified windows have been shown to cut your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
Since this is a guide for Greenwich, we gave more points to companies that serve the city. There are certainly reputable providers that didn't make the cut because they wouldn't be able to serve homeowners in Greenwich.
Work Quality
When it comes to new windows, the quality and variety of services can often play just as important of a role in overall efficiency and performance as the brand you get. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent customer feedback to find the companies with the most consistent customer satisfaction. Customer satisfaction may be the most important factor, as it reflects the quality of services across most other categories, including quality of installation, cost, warranty, quality of parts, professionalism and more.
Cost
Cheaper windows certainly don't mean better windows, but we know many of our readers want 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 protected. Window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have been in the industry for a while. Window installation companies that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.
Greenwich, CT Window Replacement FAQs
What is the typical cost to replace windows?
The national average cost to replace one window is about $600 but can range from $200 to $1,200, based on a few different factors. The price is often influenced by the size of the window, the location of your property and the type and material of the window. Also, keep in mind that energy-efficient windows may cost more initially but can save you hundreds of dollars a year in energy bills.
What kind of window is the best for energy efficiency?
A window's energy efficiency depends on several factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient since they are certified by the U.S. Department of Energy.
Do I really have to use a window installation company?
Unless you have home repair skills and have the time to replace your own windows, we recommend hiring a professional. The window installation process is complicated and can take anywhere from four to six hours for a single window. Although it's tempting to try to save money by doing it yourself, hiring a company is a faster, more efficient and much safer option.
How long does window installation typically take?
Since the average installation time is 30 minutes per window, around 16 windows can be installed during an 8-hour work day.
Should I replace all my windows at the same time?
If you're upgrading your windows because of energy-efficiency, replacing all of the windows at once is the only way to see a noticeable difference. On the other hand, if you have only one or two windows that are broken or drafty, you can replace just those.