26 Best Window Replacement Companies in Killingly, CT (2023 Reviews)
Window Companies Near Me
Are you thinking about replacing your windows? Our guide to the best window installation companies can help you narrow down which one to choose.
We analyzed all the top window installers in Killingly and selected the top 26 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 guide on the top window replacement companies in Killingly may not seem like the most captivating article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might think. Drafty, leaky windows can cost you in electric bills. In fact, the Department of Energy estimates that 25-30% of your home's heat or cool air could be lost through your windows.
Installing new, efficient windows on your home can help you save money each month on your electricity bills — and you can help the environment as well.
As windows are so important for your home, choosing the best company for you is a big choice to make. That's why the EcoWatch team has created this list of the best window replacement companies, so you can make an informed decision more easily.
Best Affordability
Window World
- Great industry reputation
- Lifetime warranty
- Low prices relative to competitors
- 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
- More expensive than competition
Best for Businesses
Aeroseal Windows
- Many years of experience
- Manufactures products in-house
- Great industry reputation
- No lifetime warranty
Best Window Replacement Companies in Killingly
The EcoWatch Reviews team evaluated dozens of window installation companies across Killingly to narrow our list down to the best ones. We assessed the providers based on their energy-efficient offerings, customer service, price, coverage area, local experience and more.

Window World
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Great industry reputation
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Lifetime warranty
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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 Killingly. This window installation company has been operating since 1995 and currently provides services to 200 locations nationwide. Its reputation is backed by several positive reviews on customer review websites.
You may want to consider picking Window World 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.
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 Killingly?Window World does not display prices on its website, but it's known for offering some of the most affordable window installations around. Requesting a free quote on its website is the best way to get more accurate information.

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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More expensive than competition
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window replacement industry.
You may want to consider choosing Andersen if you're interested in a installer 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 WindowsThere are a wide variety of window types that Renewal by Andersen offers, some of which are Energy Star products. 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 Killingly?Prices are not available on Andersen's website because 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 anywhere between $750 to $1,250 per window for an installation with Andersen. Receiving a free quote on its website is the best way to get more accurate information.

Aeroseal Windows
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Many years of experience
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Manufactures products in-house
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Great industry reputation
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No lifetime warranty
Aeroseal Windows has the best window installation for businesses in Killingly. This window installation company has been operating since 1999 and currently serves 13 states and Washington D.C. Hundreds of positive reviews on customer review websites back the company's reputation.
It installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsThe 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. Not all of Aeroseal's windows are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.
How much does Aeroseal Windows cost in Killingly?Aeroseal does not mention prices on its website, but it provides high-quality windows at a competitive price point. The best way to get more accurate information is to receive a free quote from the company.

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 provides the best residential windows in Killingly. Window Nation has been in the window installation business for around 16 years. Many positive reviews from customers online back the provider's reputation.
It has established itself as a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.
Energy Efficiency of Window Nation WindowsEach 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. Not all of Window Nation's offerings are Energy Star certified, so be sure to mention that you're interested in Energy Star windows when inquiring.
How much does Window Nation cost in Killingly?Even though pricing is not available on Window Nation's website, 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 more accurate information, you can ask for a quote on the company's website.
Please note that the companies in this section are national, which means the quality of the service may depend on your local team. We have tried to stay unbiased and transparent by listing pros and cons for every company.
More Window Replacement Companies in Killingly
Northeast Home & Energy
North Grafton, MA-
Good Customer Service
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Educational Website
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Free Quotes
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Timely Service
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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Commercial Windows
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Double-Hung
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Sliding Glass
United Better Homes
Central Falls, RI-
No-Hassle Pricing
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Free Quotes
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Locally Recognized for Quality
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Excellent Customer Service
Services Offered
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Residential Windows
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Custom Window Designs
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Full-Service Installations
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Commercial Windows
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Sliding Glass
NEWPRO
Wrentham, MA-
No-Hassle Pricing
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Good Customer Service
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Locally Recognized for Quality
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Reliable Service
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
Shine Construction Inc
Uxbridge, MA-
Educational Website
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Excellent Customer Service
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No-fee Quotes
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Arrives on Time
Services Offered
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Residential Windows
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Custom Window Designs
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Full-Service Installations
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Commercial Windows
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Double-Hung
Shine Construction Inc
Uxbridge, MA-
No-Hassle Pricing
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Excellent Customer Service
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Helps Educate Customers
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Consistent Workmanship
Services Offered
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Residential Windows
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Custom Windows
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Full-Service Installations
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Commercial Windows
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Double-Hung
Krystal Glass & Door Co
Smithfield, RI-
Price Transparency
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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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Residential Windows
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Architectural Glass
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Glass Showers
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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
The Window Source RI
Smithfield, RI-
No-fee Quotes
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Helps Educate Customers
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Reliable Appointment Windows
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Dependable Service
Services Offered
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Architectural Glass
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Tempered Glass
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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
Guaranteed Building Maintenance
Sturbridge, MA-
Arrives on Time
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No-Hassle Pricing
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Helps Educate Customers
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Locally Recognized for Quality
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-
Helps Educate Customers
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Price Transparency
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Good Customer Service
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Locally Recognized for Quality
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 Windows
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Commercial Windows
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Sliding Glass
Window World of Boston
Shrewsbury, MA-
Locally Recognized for Quality
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Arrives on Time
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Educational Website
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Free Quotes
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
Mr. Handyman of Norwich, New London and Glastonbury
Norwich, CT-
Helps Educate Customers
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No-Hassle Pricing
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Dependable Service
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Free Quotes
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
Thomas Garbati Builders, LLC
Waterford, CT-
Locally Recognized for Quality
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No-Hassle Pricing
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Reliable Appointment Windows
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Consistent Workmanship
Services Offered
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Custom Windows
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Residential Windows
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Double-Hung
Guaranty Glass and Mirror
Spencer, MA-
Price Transparency
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Free Quotes
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Good Customer Service
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Dependable Service
Services Offered
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Residential Windows
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Architectural Glass
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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
Window World of Rhode Island
Warwick, RI-
Price Transparency
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Good Customer Service
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Free Quotes
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Educational Website
Services Offered
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Custom Windows
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Architectural Glass
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Sliding Glass
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Double-Hung
Henderson Roofing
Westerly, RI-
Dependable Service
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Helps Educate Customers
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Excellent Customer Service
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Free Quotes
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-
Reliable Appointment Windows
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Good Customer Service
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Consistent Workmanship
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Helps Educate Customers
Services Offered
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Custom Window Designs
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Residential Windows
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Business Windows
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Sliding Glass
The Siding Store, Inc
Plainfield, 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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Custom Window Designs
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Residential Windows
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Energy-Efficient Options
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Sliding Glass
GA Siding, Windows & Roofing
Oxford, MA-
Timely Service
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Free Quotes
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Excellent Customer Service
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Price Transparency
Services Offered
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Custom Window Designs
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Residential Windows
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Business Windows
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Sliding Glass
Jancon Exteriors
Franklin, MA-
Educational Website
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No-Hassle Pricing
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Excellent Customer Service
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Locally Recognized for Quality
Services Offered
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Double-Hung
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Residential Windows
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Full-Service Installations
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Custom Windows
Glass America
7+ years in business · Westerly, RI-
Excellent Customer Service
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Helps Educate Customers
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No-fee Quotes
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Reliable Appointment Windows
Services Offered
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Custom Windows
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Business Windows
Lockheed Architectural Solutions, Inc.
Pascoag, RI-
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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Architectural Glass
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Doors
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Custom Window Designs
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Business Windows
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Double-Hung
Renewal by Andersen of Rhode Island
Smithfield, RI-
Reliable Service
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Free Quotes
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Excellent Customer Service
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Price Transparency
Services Offered
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Energy-Efficient Options
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Custom Window Designs
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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
Christopher Home Improvement
Norwich, CT-
No-fee Quotes
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Excellent Customer Service
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No-Hassle Pricing
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Dependable Service
Services Offered
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Custom Windows
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Residential Windows
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Business Windows
Igor's Construction
Worcester, MA-
Award-Winning
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No-fee Quotes
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Dependable Service
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Price Transparency
Services Offered
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Custom Windows
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Residential Windows
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Aluminum Window Frames
Providence Glass & Mirror, LLC
Providence, RI-
Price Transparency
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Good Customer Service
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Helps Educate Customers
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No-fee Quotes
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
Marshall Building & Remodeling
Riverside, RI-
Locally Recognized for Quality
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Free Quotes
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Good Customer Service
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No-Hassle Pricing
Services Offered
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Custom Windows
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Residential Windows
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Energy-Efficient Options
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Double-Hung
How Installing Energy-Efficient Windows in Killingly Saves You Money
There are several perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the change include the following:
- Save money on electricity bills: Once you switch to energy-efficient windows, you can expect a reduction in your bills by about 12% because you'll use less energy to heat or cool your house.
- Decrease your carbon footprint: By using less energy once switching to Energy Star certified windows, you'll also be cutting your carbon dioxide emissions by about 12%, according to Energy Star.
- Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
- Protect your investment: If your home is on the older side, your windows are most likely outdated. Upgrading your windows can improve the insulation in your home and also help increase the value of your property if you decide to sell.
Estimated Cost of Window Replacement in Killingly
Each window replacement company provides various services and has different price points based on several factors.
How Much Do New Windows Cost?
On average, Killingly homeowners can anticipate their window replacements to range from $250 to $1,200. The most common installations sit at around $600. How much it will cost varies depending on several factors, like material, type, number of windows, the location of your home, size and more.
It's important to remember that windows with higher efficiency may cost more initially but can save you hundreds of dollars via returns on your energy bills. Investing in certified energy-efficient windows can save Killingly homeowners $457+ a year when replacing single-pane windows.
Costs will also vary based on the material of your frame. Aluminum frames have the lowest price. They're sturdy, light and maintenance-free, but provide poor insulation. Vinyl frames are a bit more expensive and provide good insulation. Composite frames made from 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 step of a replacement is to think about whether you need a full-frame or pocket installation.
Full-frame installations require replacing the whole 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 significant damage. Full-frame installations are more comprehensive and will increase overall costs. Pocket installations (also known as retrofits) are when you replace a window without replacing the frame. Pocket installations are simpler and won't carry as large a bill, but you can't do this kind of installment if you have any pre-existing rot or water damage.
If you're not sure which kind of window installation service you should get, your installer can help you out. Generally, the choice depends on factors like the age and condition of the home, the type of building material, budget and time restrictions.
Best Affordability
Window World
- Great industry reputation
- Lifetime warranty
- Low prices relative to competitors
- 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
- More expensive than competition
Best for Businesses
Aeroseal Windows
- Many years of experience
- Manufactures products in-house
- Great industry reputation
- No lifetime warranty
How We Choose the Best Window Installers in Killingly
The EcoWatch Reviews team differs from other reviewers because we look at these companies through a sustainability lens. We have reviewed the best window installation companies in Killingly mainly based on their energy efficient offerings, as it's what's best for the environment and for you as a homeowner. Energy-efficient windows can reduce your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
This one is pretty self-explanatory, but we've chosen to highlight window installers that serve a wide variety of states and cities so you can find a quality window installation company near you.
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 installer included on this list to ensure its contractors are well-qualified and that the company has gotten a lot of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed patterns in recent customer feedback to determine the companies with the most consistent customer satisfaction. Customer satisfaction might be the factor we place the most value on, as it indicates the quality of services across nearly every category, 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 try to keep costs as low as possible. When analyzing providers' prices, 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 provide 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 installers that have more experience will earn higher rankings by our standards. We like to see at least ten years of experience.
Killingly, CT Window Replacement FAQs
What is the average cost to replace windows?
The national average cost of replacing a single window is around $600 but can range between $200 and $1,200, based on a variety of factors. The price is usually influenced by the type and material of the window, the location of your property and the size of the window. Also, remember that energy-efficient windows may cost more initially but can save you a decent amount of money a year in energy bills.
What are the kinds of windows?
There are various kinds of windows you can get for your home, including casement windows, bay windows, awning windows, double-hung and single-hung windows, picture windows, transom windows and slider windows.
What do window installers do?
Window installers cover the entire process — from replacing your old windows with new ones to cleaning up after the installation. In addition, many companies offer window manufacturing, customization and repairs.
What time of year should I replace my windows?
Though you can install windows any time of year, warmer weather is generally better for replacing windows. Additionally, the weather should be dry, since rain can make the installation more difficult.
Should I replace my windows all at once?
If you want to get more efficient windows and save money on your energy bills, replacing all the windows at the same time is the only way to gain that benefit. However, if you have only one or two windows that are damaged or drafty, you can replace just those.