24 Best Window Replacement Companies in Newtown, CT (2023 Reviews)
Window Companies Near Me
When the time comes to upgrade your windows, our list of the best window installation companies can help you find the provider for you.
We analyzed all the top window installers in Newtown and selected the top 24 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
A review of the best window replacement companies in Newtown may not seem like the most riveting article on EcoWatch, but trust us, windows impact your life more than you might think. The Department of Energy estimates that heat gained or lost through outdated or drafty windows could account for about 30% of heating and cooling usage. In Newtown, where the electric bills are an average of $39 per month, that's almost $$140 per year wasted.
That's also bad for the environment, as the extra energy required by leaky windows increases your carbon footprint.
So if you're building a new home, renovating or updating your windows in Newtown, you've found the best place to get started.
Best Affordability
Window World
- Large serice area
- EnergyStar Partner
- Great industry reputation
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Manufactures products in-house
- Member of US Green Building Council
- Great industry reputation
- No lifetime warranty
Best for Businesses
Aeroseal Windows
- Low number of customer complaints
- Custom Designs
- Manufactures products in-house
- Not ideal for residential installations
Best Window Replacement Companies in Newtown
The EcoWatch Reviews team assessed several window providers across Newtown to narrow our list down to the top ones. The companies in this article scored best in our categories: energy-efficient offerings, availability, customer service, price and more.

Window World
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Large serice area
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EnergyStar Partner
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Great industry reputation
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Quality of service will depend on your area
Window World has windows expertise in Newtown. This window installation company has been operating since 1995 and currently services 200 locations nationwide.
Window World may be the company for you if you want one 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 WindowsIts high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World's offerings are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.
How much does Window World cost in Newtown?Window World does not detail prices on its website, but it's known for offering some of the most affordable window installations around. If you'd like more accurate pricing information, you can request a quote on the company's website.

Renewal by Andersen
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Manufactures products in-house
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Member of US Green Building Council
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Great industry reputation
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No lifetime warranty
Renewal by Andersen has the best availability in Newtown. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has been in business since 1995 and currently serves nearly every state except Mississippi and West Virginia. Its reputation is backed by several positive reviews from customers online.
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 has 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. 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 Newtown?Prices aren't listed on Andersen's 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 pricing.

Aeroseal Windows
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Low number of customer complaints
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Custom Designs
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Manufactures products in-house
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Not ideal for residential installations
Aeroseal Windows offers the best window installation for businesses in Newtown. 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. Hundreds of positive reviews from customers online back the company's reputation.
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 is an Energy Star partner with a variety of energy-efficient windows. Note that not all of the company's windows are Energy Star certified, so be sure to mention that you want energy-efficient windows to your Aeroseal representative when inquiring about services.
How much does Aeroseal Windows cost in Newtown?Though pricing is not available on Aeroseal's website, it provides high-quality windows at a competitive price point. You can request a free quote on its website for more information about pricing.

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 Newtown. Window Nation has around 16 years of experience in the industry, and it currently provides services to residents within 75 miles of its showrooms, which are in 13 states. Its reputation is backed by hundreds of positive reviews on customer review websites.
You may want to consider picking Window Nation if you're interested in 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 has 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 Newtown?Pricing information is not available on Window Nation's website since the cost of window installment 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. Receiving a free quote on its website is the best way to know for sure.
We've recommended companies with good reputations, but keep in mind some national companies have independently owned locations in Newtown, so the quality of service may differ depending on your local crew. We have tried to be unbiased and transparent by describing pros and cons for every company we reviewed.
More Window Replacement Companies in Newtown
Renewal by Andersen - Branford
Branford, CT-
Price Transparency
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Timely Service
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Reliable Service
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Award-Winning
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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Double-Hung
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Stained Glass
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Sliding Glass
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Bay Windows
TL Home Improvement LLC
Shelton, CT-
Award-Winning
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Reliable Service
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Good Customer Service
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Free Quotes
Services Offered
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Residential Windows
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Fast Delivery
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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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Full-Service Installations
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Double-Hung
Renewal by Andersen
Stamford, CT-
Good Customer Service
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Price Transparency
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No-fee Quotes
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Arrives on Time
Services Offered
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Custom Windows
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Commercial 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
Nu-Face Home Improvements
Plantsville, CT-
Reliable Service
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Timely Service
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Good Customer Service
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Educational Website
Services Offered
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Residential Windows
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Glass Showers
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Energy-Efficient Options
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Custom Window Designs
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Double-Hung
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Sliding Glass
ATM Mirror & Glass
Buchanan, NY-
Award-Winning
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Helps Educate Customers
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Good 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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Glass Showers
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Fast Delivery
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Energy-Efficient Options
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Doors
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Custom Window Designs
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Aluminum Window Frames
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Commercial Windows
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Sliding Glass
Mr. Handyman of Upper Fairfield County
Fairfield, CT-
Helps Educate Customers
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Reliable Service
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Arrives on Time
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Price Transparency
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Business Windows
Giant Siding and Windows
White Plains, NY-
Timely Service
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Excellent Customer Service
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Educational Website
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Consistent Workmanship
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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Sliding Glass
The Window People
Stamford, CT-
Reliable Service
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Helps Educate Customers
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No-Hassle Pricing
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Good Customer Service
Services Offered
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Residential Windows
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Architectural Glass
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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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Business Windows
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Double-Hung
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Sliding Glass
Advanced Window Systems LLC
Cromwell, CT-
No-fee Quotes
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Timely Service
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Good Customer Service
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Consistent Workmanship
Services Offered
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Glass Showers
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Energy-Efficient Options
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Eastern Glass & Shower Door
Milford, CT-
Price Transparency
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Free Quotes
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Helps Educate Customers
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Excellent Customer Service
Services Offered
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Doors
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Full-Service Installations
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Custom Windows
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Tempered Glass
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Residential Windows
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Business Windows
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Aluminum Window Frames
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Sliding Glass
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Glass Showers
Mainville Windows & Doors
Newington, CT-
Timely Service
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No-Hassle Pricing
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Helps Educate Customers
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No-fee Quotes
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
V. Nanfito Roofing & Siding
Meriden, CT-
Excellent Customer Service
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Free Quotes
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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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Commercial Windows
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Full-Service Installations
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Custom Windows
Mr. Handyman of Guilford, North and East Haven
East Haven, CT-
Price Transparency
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Good Customer Service
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Dependable Service
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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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Commercial Windows
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Double-Hung
Torrington Replacement Windows
Torrington, CT-
Price Transparency
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Helps Educate Customers
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Good Customer Service
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Free Quotes
Services Offered
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Architectural Glass
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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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Double-Hung
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Sliding Glass
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Bay Windows
Plymouth Glass & Mirror, Inc.
Thomaston, CT-
Helps Educate Customers
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Excellent Customer Service
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Free Quotes
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No-Hassle Pricing
Services Offered
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Glass Showers
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Residential Windows
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Architectural Glass
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Doors
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Custom Windows
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Commercial Windows
Villwell Builders, LLC
Waterbury, CT-
Educational Website
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Good Customer Service
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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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Business Windows
Window King of Connecticut
Stamford, CT-
Arrives on Time
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Free Quotes
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Helps Educate Customers
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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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Aluminum Window Frames
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Business Windows
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Double-Hung
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Sliding Glass
Wallingford Glass
Wallingford, CT-
Price Transparency
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Consistent Workmanship
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Excellent Customer Service
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No-fee Quotes
Services Offered
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Residential Windows
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Tempered Glass
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Doors
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Custom Windows
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Business Windows
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Double-Hung
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Stained Glass
Ring's End
Branford, CT-
No-Hassle Pricing
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Educational Website
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Good Customer Service
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Free Quotes
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Commercial Windows
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Aluminum Window Frames
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Architectural Glass
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Fast Delivery
Ring's End
South Salem, NY-
Free Quotes
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No-Hassle Pricing
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Educational Website
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Good Customer Service
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Business Windows
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Aluminum Window Frames
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Architectural Glass
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Fast Delivery
Fiderio & Sons
Meriden, CT-
Consistent Workmanship
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Helps Educate Customers
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Excellent Customer Service
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Price Transparency
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
J C Tonnotti Window Co
Southington, CT-
Price Transparency
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Free Quotes
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Good Customer Service
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Timely Service
Services Offered
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Custom Windows
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Aluminum Window Frames
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Sliding Glass
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Double-Hung
Window Nation
Wallingford, CT-
No-fee Quotes
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Helps Educate Customers
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Good Customer Service
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Dependable Service
Services Offered
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Sliding Glass
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Custom Window Designs
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Energy-Efficient Options
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Double-Hung
Franzoso Contracting
Croton-On-Hudson, NY-
Reliable Appointment Windows
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No-Hassle Pricing
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Educational Website
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Good Customer Service
Services Offered
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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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Energy-Efficient Options
How Installing Energy-Efficient Windows in Newtown Saves You Money
When you upgrade to energy-efficient windows, you may see a few perks, such as:
- Protect your valuables: Many Energy Star certified 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: When you have an older home, your windows could also be outdated or drafty. Upgrading and repairing your windows is an important part of maintaining your property and its value.
- Reduce your carbon footprint: Decreasing the amount of energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by 147 pounds per year on average.
- Save money on electricity bills: The Department of Energy estimates that heat gained or lost via windows makes up about 25-30% of household energy use. Upgrading to energy-efficient windows can help lower that number, which helps you save some money on your bills.
Estimated Cost of Window Replacement in Newtown
Each window installation company offers varying services and has different price points based on a few factors.
How Much Do New Windows Cost?
According to our market research, the typical cost of replacing a single window is about $600. However, window replacement costs can range from $200 to $1,200 per window. Costs will vary significantly based on the number of windows you need, the current condition of your home, your location and the quality of your products. A lot of window companies also offer replacement door installations and other add-ons like baths, shutters, coating and more. Additional services will increase your overall project costs.
It's important to bear 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 certified energy-efficient windows can save Newtown homeowners $441+ a year when replacing single-pane windows.
We advise getting free quotes from multiple window installation companies to find the one that works best for you.
What Services do Window Installers Offer?
In regard to window installations, there are generally two types that your installer will have: full-frame and pocket installations.
Full-frame installations require replacing the full window — the sill, frame, trim and all. These are typically done when you want to change the style of your window or when it has a great amount of deterioration. Full-frame installations are more involved and will increase overall costs. A pocket installation means replacing a window within the existing frame, which is usually less expensive than a full-frame installation.
Your window replacement company will be able to help you choose what's best for your needs. In Newtown, the decision will mostly be based on how old your windows are and if there's any damage. Wood can decay if not properly maintained over the years, so it's good to have a professional check on your frames and window sills.
Best Affordability
Window World
- Large serice area
- EnergyStar Partner
- Great industry reputation
- Quality of service will depend on your area
Best Overall
Renewal by Andersen
- Manufactures products in-house
- Member of US Green Building Council
- Great industry reputation
- No lifetime warranty
Best for Businesses
Aeroseal Windows
- Low number of customer complaints
- Custom Designs
- Manufactures products in-house
- Not ideal for residential installations
How We Choose the Best Window Installers in Newtown
EcoWatch reviews are different from most reviews because we examine these companies through a sustainability lens. We've reviewed the top window installers in Newtown mainly based on their energy efficient offerings, as it's the most sustainable option and the best one for homeowners. Energy-efficient windows can cut your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
Since this is a guide for Newtown, we gave more points to companies that serve the city. There are certainly other reputable providers that didn't make our list because they wouldn't be able to serve homeowners in Newtown.
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 in our guide to make sure its technicians are well-qualified and that the company has gotten lots of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed trends in recent customer feedback to find the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction may be the factor we place the most value on, as it indicates the quality of services across most other categories, including quality of installation, cost, warranty, quality of parts, professionalism and more.
Cost
Cheaper windows don't necessarily mean better windows, but we know many of our readers want to keep costs as low as possible. When analyzing providers' prices, we awarded 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 make sure that investment is well protected. Window installation companies that offer lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have a good track record in the industry. Window installers that have more experience earn higher rankings by our standards. We like to see at least ten years of experience.
Newtown, CT Window Replacement FAQs
How much does a window install cost?
The average cost of replacing one window can range between $450 and $650. There are several factors that influence the price, such as the number of windows, local labor costs, the materials used in designing the windows, how energy-efficient the windows are, your property's location and styles and sizes of windows.
What type of window is the most energy-efficient?
Generally, double-pane windows are more efficient than single-pane windows and windows that don't open will be more efficient than windows that do. If you want to be sure you're getting the most energy-efficient windows, look for models with the blue Energy Star certification attached to them — they're certified energy-efficient by the U.S. Department of Energy.
Can I install my own windows?
If you're handy and have experience with similar home improvement projects, you may be able to install your own windows. But if you don't have the time or skills, we don't recommend doing it on your own.
What time of year is a good time to replace my windows?
Replacement windows can be installed during any season, but warmer weather is typically better. No matter 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 isn't necessarily a big factor. Most importantly, the weather should be dry.
How often do you need to replace 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 any damage on them, or they have become difficult to operate, they may be in need of replacement.