22 Best Window Replacement Companies in Willimantic, CT (Mar 2023)
Window Companies Near Me
Are you thinking about replacing your windows? Our list of the best window installation companies can help you narrow down which one to pick.
We analyzed all the top window installers in Willimantic and selected the top 22 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 March 14, 2023
Why you can trust EcoWatch
Although clean energy sources like wind and solar are important when it comes to reducing your carbon footprint, improving your house's energy efficiency can also have a big impact on home energy conservation. Drafty windows can cost you in electric bills. In fact, the Department of Energy estimates that about 30% of your house's heat or cool air could be lost through your windows.
That's not great for either your wallet or the environment, but one of the best window installation companies can help you with that.
We've put together this list of the best installation companies to help you in your search, so you can not only take advantage of brand new windows, but also save money on your power bills.
Best Affordability
Window World
- EnergyStar Partner
- Large serice area
- Low prices relative to competitors
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Award-winning company
- Member of US Green Building Council
- Manufactures products in-house
- More expensive than competition
Best for Businesses
Aeroseal Windows
- Custom Designs
- Low number of customer complaints
- Great industry reputation
- No lifetime warranty
Best Window Replacement Companies in Willimantic
The EcoWatch team examined dozens of installers in Willimantic to find the top ones for our readers. The installers mentioned in this article scored best in our review categories, which include energy-efficient offerings, local expertise, price, customer service, availability and more.

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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Quality of service will depend on your area
Window World provides windows expertise in Willimantic. Window World has about 27 years of experience in the window replacement industry. The company has plenty of positive reviews from customers online.
If you're looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, Window World may be the right provider for you.
Energy Efficiency of Window World WindowsThere are a wide variety of window types that Window World offers, some of which are Energy Star products. 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 Willimantic?Pricing details are not available on Window World's website because the cost of window replacement varies greatly depending on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. You can ask for a free quote on its website for more information about pricing.

Renewal by Andersen
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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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More expensive than competition
Renewal by Andersen provides the best availability in Willimantic. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has over 27 years of experience in the windows industry, and it currently provides services to nearly every state except Mississippi and West Virginia. The company has many glowing reviews from customers online.
You may want to consider picking Andersen if you're looking for 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 offers some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for Energy Star windows when inquiring. 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 Willimantic?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 get more accurate information is to ask for a free quote from the company.

Aeroseal Windows
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Custom Designs
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Low number of customer complaints
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Great industry reputation
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No lifetime warranty
Aeroseal Windows provides the best window installation for businesses in Willimantic. 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. Aeroseal has around 23 years of industry experience, and it currently provides services to 13 states and Washington D.C. The company has many glowing reviews from customers on online review websites.
You may want to consider going with Aeroseal if you're looking for a company that installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company's windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Aeroseal representative when inquiring about services.
How much does Aeroseal Windows cost in Willimantic?Prices aren't mentioned on Aeroseal's website, but it provides high-quality windows at a competitive price point. Getting a free quote on its website is the best way to know for sure.

Window Nation
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Award-winning company
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Manufactures products in-house
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Custom designs
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Wide variety of products and services
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Installation not covered by warranty
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Limited service area
Window Nation has the best residential windows in Willimantic. 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 industry for about 16 years.
If you're looking for a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms, this may be the company for you.
Energy Efficiency of Window Nation WindowsWindow Nation has some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to ask for 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 Willimantic?Prices aren't mentioned on Window Nation's website, but 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. The best way to get more accurate information is to request a free quote from the company.
We aim to remain unbiased and transparent by describing pros and cons for every company. Additionally, any partnerships do not affect our rankings.
More Window Replacement Companies in Willimantic
Renewal by Andersen - Southern New England
Windsor Locks, CT-
Award-Winning
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Timely Service
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Educational Website
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Free Quotes
Services Offered
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Residential Windows
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Custom Windows
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Business Windows
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Double-Hung
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Stained Glass
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Sliding Glass
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Bay Windows
Advanced Window Systems LLC
Cromwell, CT-
Free Quotes
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Educational Website
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Excellent Customer Service
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Timely Service
Services Offered
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Glass Showers
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Energy-Efficient Options
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Mainville Windows & Doors
Newington, CT-
Free Quotes
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Excellent Customer Service
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No-Hassle Pricing
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Helps Educate Customers
Services Offered
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Residential Windows
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Custom Window Designs
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
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Sliding Glass
Guaranteed Building Maintenance
Sturbridge, MA-
Award-Winning
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Timely Service
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Educational Website
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Price Transparency
Services Offered
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Residential Windows
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Commercial Windows
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Sliding Glass
United Glass & Mirror Co
Bozrah, CT-
Excellent Customer Service
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Price Transparency
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Educational Website
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Award-Winning
Services Offered
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Residential Windows
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Architectural Glass
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Glass Showers
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Heavy Glass
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Tempered Glass
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Doors
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Custom Window Designs
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Commercial Windows
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Sliding Glass
Window World of Hartford
Manchester, CT-
Helps Educate Customers
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No-Hassle Pricing
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Locally Recognized for Quality
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No-fee Quotes
Services Offered
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Custom Windows
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Fast Delivery
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Sliding Glass
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Double-Hung
V. Nanfito Roofing & Siding
Meriden, CT-
Excellent Customer Service
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Educational Website
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Locally Recognized for Quality
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No-fee Quotes
Services Offered
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Residential Windows
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Commercial Windows
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Full-Service Installations
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Custom Window Designs
Mr. Handyman of Norwich, New London and Glastonbury
Norwich, CT-
Free Quotes
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Consistent Workmanship
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Price Transparency
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Reliable Appointment Windows
Services Offered
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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
Turner Home Improvement Contractors, LLC,
Glastonbury, CT-
Reliable Service
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No-fee Quotes
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Timely Service
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Price Transparency
Services Offered
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Residential Windows
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Commercial Windows
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Full-Service Installations
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Custom Window Designs
Peter L Brown
Granby, CT-
Helps Educate Customers
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No-fee Quotes
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No-Hassle Pricing
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Excellent Customer Service
Services Offered
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Energy-Efficient Options
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Custom Window Designs
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Capitol Glass Co Inc
West Hartford, CT-
No-fee Quotes
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Educational Website
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Excellent Customer Service
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Price Transparency
Services Offered
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Residential Windows
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Architectural Glass
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Doors
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Custom Window Designs
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Aluminum Window Frames
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Full-Service Installations
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Business Windows
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Sliding Glass
Clinton Glass
Clinton, CT-
Good Customer Service
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Educational Website
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No-fee Quotes
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Locally Recognized for Quality
Services Offered
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Residential Windows
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Glass Showers
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Fast Delivery
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Custom Windows
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Business Windows
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Sliding Glass
Thomas Garbati Builders, LLC
Waterford, CT-
Educational Website
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Good Customer Service
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Arrives on Time
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Reliable Service
Services Offered
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Custom Window Designs
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Residential Windows
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Double-Hung
Renewal by Andersen Windows Connecticut
Cromwell, CT-
Free Quotes
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Price Transparency
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Reliable Service
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Good Customer Service
Services Offered
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Full-Service Installations
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Double-Hung
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Sliding Glass
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Bay Windows
Cussons Sash
Glastonbury, CT-
Educational Website
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No-Hassle Pricing
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Free Quotes
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Good Customer Service
Services Offered
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Custom Windows
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Residential Windows
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Business Windows
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Sliding Glass
Fiderio & Sons
Meriden, CT-
Arrives on Time
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Excellent Customer Service
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Educational Website
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Reliable Service
Services Offered
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Custom Windows
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Aluminum Window Frames
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Full-Service Installations
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Double-Hung
Major Home Improvements LLC - Roofing
Springfield, MA-
Educational Website
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Excellent Customer Service
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Reliable Appointment Windows
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Reliable Service
Services Offered
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Custom Windows
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Residential Windows
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Aluminum Window Frames
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Double-Hung
Vovk Home Improvement Siding~Roof~Windows
Feeding Hills, MA-
Good Customer Service
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No-Hassle Pricing
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Consistent Workmanship
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Helps Educate Customers
Services Offered
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Sliding Glass
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Custom Windows
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Energy-Efficient Options
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Double-Hung
Window Nation
Wallingford, CT-
Consistent Workmanship
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Good Customer Service
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Locally Recognized for Quality
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No-Hassle Pricing
Services Offered
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Sliding Glass
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Custom Windows
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Energy-Efficient Options
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Double-Hung
Henderson Roofing
Westerly, RI-
Reliable Service
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Price Transparency
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Free Quotes
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Good Customer Service
Services Offered
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Custom Windows
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Residential Windows
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Full-Service Installations
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Commercial Windows
Window Wizards
Pawcatuck, CT-
Educational Website
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Price Transparency
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No-fee Quotes
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Consistent Workmanship
Services Offered
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Custom Windows
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Residential Windows
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Commercial Windows
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Sliding Glass
The Siding Store, Inc
Plainfield, CT-
Good Customer Service
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Dependable Service
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No-fee Quotes
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Reliable Appointment Windows
Services Offered
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Custom Window Designs
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Residential Windows
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Energy-Efficient Options
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Sliding Glass
How Installing Energy-Efficient Windows in Willimantic Saves You Money
Upgrading to energy-efficient windows can help improve the comfort of your home and help you save on energy bills. Here are more ways upgrading your windows could help you:
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only insulate your home better, but also filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes usually have windows that are outdated, drafty or maybe even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.
- Save money on electricity bills: According to the Department of Energy, heat gained or lost through windows accounts for around 25-30% of household energy use. Installing energy-efficient models can help decrease that number, therefore saving you about 12% more on your bills.
- Decrease your carbon footprint: By using less energy once upgrading to Energy Star certified windows, you'll also be cutting your carbon dioxide emissions by about 12%, according to Energy Star.
Estimated Cost of Window Replacement in Willimantic
Let's take a look at the cost of installing new windows and the kinds of services offered by installers.
How Much Do New Windows Cost?
According to our market research, the typical cost to install a single window is around $600. However, window installation costs can range from $200 to $1,200 for each window. But prices differ considerably based on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also provide door replacements, which have a higher price tag.
Whether or not you choose energy-efficient windows is another factor that will determine the cost. These will usually cost more than other windows, but on the other hand, you can save about $457 a year on your energy bills in Willimantic.
Costs will also vary depending on the material you pick for your window frames. Aluminum frames have the lowest price. They're sturdy, light and maintenance-free, but provide poor insulation. Vinyl frames are somewhat expensive and provide good insulation. Composite frames made with wood fibers encased in plastic also provide good insulation and are moderately expensive. Wood frames are the most expensive and are the most in-demand. They're also aesthetically pleasing and provide decent insulation for your home.
What Services do Window Installers Offer?
The first question to ask yourself when planning on installing new windows is: Should you get a full-frame installation or a pocket installation?
Full-frame installations entail replacing the full window, including the trim, frame and sill. Full-frame installations are necessary when you want to change the style of your windows or your window has considerable rot or deterioration. Because full-frame installations are more involved, they will raise the overall cost. A pocket installation involves replacing a window within the existing frame, which is usually less expensive than a full-frame installation.
Your window installation company will be able to help you decide what's best for your needs. In Willimantic, the decision will mostly be based on how old your home is and if there's any moisture damage. Wood can decay if it's not properly maintained over the years, so it's good to have a professional assess your frames and window sills.
Best Affordability
Window World
- EnergyStar Partner
- Large serice area
- Low prices relative to competitors
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Award-winning company
- Member of US Green Building Council
- Manufactures products in-house
- More expensive than competition
Best for Businesses
Aeroseal Windows
- Custom Designs
- Low number of customer complaints
- Great industry reputation
- No lifetime warranty
How We Choose the Best Window Installers in Willimantic
In our hunt to make your home improvements easier and more eco-friendly in Willimantic, the EcoWatch Reviews team evaluated dozens of companies before settling on these. We have decided to assess the best window installation companies in Willimantic mainly based on energy efficiency, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can lower 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 Willimantic, we paid more attention to companies that cover the city. There are other reputable providers that didn't make the cut because of the low odds that they would serve the average homeowner in Willimantic.
Work Quality
We're willing to bet that you're looking for professionals who do a great job installing windows. We've vetted each installer featured in our guide to make sure its technicians are well-qualified and that the company has gotten plenty of positive customer feedback to vouch for its service.
Customer Reviews
Customer feedback is another super important review factor. If most customers don't have good feedback about their service from a certain company, it won't be featured on EcoWatch.
Cost
Cheaper windows don't necessarily mean better windows, but we know many of our readers would like to keep costs as low as possible. When analyzing the prices of providers, we awarded higher scores to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
Protecting your investment in new windows is important. That's why window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have a proven track record in the industry. Window installers that have more experience will earn higher rankings by our standards. We like to see at least ten years of experience.
Willimantic, CT Window Replacement FAQs
What is the average cost to install windows?
The national average cost to replace one window is around $600 but can range from $200 to $1,200, depending on a variety of factors. The price is usually dependent on the location of your property, the size of the window 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 are the different kinds of windows?
The most common types of windows for homes include: transom windows, bay windows, slider windows, double-hung and single-hung windows, picture windows, casement windows and awning windows.
When should I use a window installation company?
You should use a window installation professional whenever you need to upgrade your windows. Installing windows is a involved process that can be difficult and time-consuming, so it's best handled by the professionals.
How long does window installation take?
Each window takes around 30 minutes to install based on the type of window. However, the window installation can be a two-day job — or more — if you have a lot of windows that need to be installed.
How do you know it's time to replace your windows?
Windows have an average lifespan of about 20 to 30 years. If your windows are older than that, they should probably be replaced. Other than that, if your windows have damage anywhere on them, or they have become difficult to operate, they may need to be replaced.