20 Best Window Companies in Willimantic, CT (2025 Reviews)
Thinking about replacing your windows? We’ve got all the information you need in this list of the best window installation companies.
We analyzed all the top-rated window companies in Willimantic and selected the best 20 based on:
Customer reviews
Window installation expertise
Popularity with home-owners like you
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Why you can trust EcoWatch
A review of the top window replacement companies in Willimantic may not seem like the most interesting article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might think. According to the Department of Energy, heat gained or lost through outdated, drafty windows could make up 25-30% of heating and cooling costs.
Installing upgraded, efficient windows on your house can help you save money every month on your power bills — and you can help the environment, too.
We’ve made a list of the best installation companies to help you in your research, so you can not only take advantage of brand-new windows, but also save money on your electricity bills.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Window Installation & Replacement Companies in Willimantic
The EcoWatch team assessed several window installation companies across Willimantic to narrow our list down to the top ones. We assessed the companies based on energy-efficient offerings, local experience, price, customer service, coverage area and more.

Window World
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
Quality of service will depend on your area
Window World provides windows expertise in Willimantic. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has around 27 years of experience in the window installation business. The company has a lot of glowing 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, this may be the perfect company for you.
Energy Efficiency of Window World WindowsWindow World is an Energy Star partner and has 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 Window World representative when inquiring about services.
How much does Window World cost in Willimantic?While pricing is not readily available on Window World’s website, it's known for offering some of the most affordable window installations around. Getting a free quote on its website is the best way to get more accurate information.

Renewal by Andersen
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
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 around 27 years of experience in the window installation business. The company has a lot of glowing reviews from customers online.
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, this may be the perfect company for you.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen is an Energy Star partner and has 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 Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Willimantic?While pricing is not readily available on Andersen’s website, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. Getting a free quote on its website is the best way to get more accurate information.

Aeroseal Windows
Many years of experience
Great industry reputation
Low number of customer complaints
Manufactures products in-house
Custom Designs
No lifetime warranty
Not ideal for residential installations
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 experience in the window installation business. The company has a lot of glowing reviews from customers online.
If you’re looking for a company that installs windows and doors at businesses across the Eastern U.S, this may be the perfect company for you.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows is an Energy Star partner and has 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 Willimantic?While pricing is not readily available on Aeroseal’s website, it provides high-quality windows at a competitive price point. Getting a free quote on its website is the best way to get more accurate information.

Window Nation
Award-winning company
Manufactures products in-house
Custom designs
Wide variety of products and services
Installation not covered by warranty
Limited service area
Window Nation provides 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 around 16 years of experience in the window installation business. The company has a lot of glowing reviews from customers online.
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 perfect company for you.
Energy Efficiency of Window Nation WindowsWindow Nation is an Energy Star partner and has 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 Window Nation representative when inquiring about services.
How much does Window Nation cost in Willimantic?While pricing is not readily 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. Getting a free quote on its website is the best way to get more accurate information.
We have tried to stay unbiased and transparent by describing pros and cons for each provider. Additionally, any partnerships do not influence our reviews.
More Window Companies in Willimantic
Renewal by Andersen Window Replacement
Middletown, CTGood Customer Service
Free assessment
Price Transparency
Services Offered
Vinyl Frames
Glass Doors
Double-Hung
Bay Windows
Energy-Efficient Options
Window Replacement/Installation
Custom Window Designs
Power Home Remodeling
Trumbull, CTPrice Transparency
Good Customer Service
Timely Service
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Window Nation
Wallingford, CTFree assessment
Price Transparency
Educational Website
Services Offered
Bay Windows
Double-Hung
Custom Window Designs
Energy-Efficient Options
Glass Doors
Window Replacement/Installation
DaBella
Westborough, MATransferable warranties
Alside® vinyl windows
Timely Service
family_owned
Good Customer Service
Services Offered
Vinyl Frames
Window Replacement/Installation
Glass Doors
Double-Hung
Big Dawg Home Improvements
South Windsor, CTTimely Service
Price Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Skylights
Window Repair
Energy-Efficient Options
Budget Blinds of Enfield and Hartford
Somers, CTFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Custom Window Designs
Paramount Gallery
West Hartford, CTPrice Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Custom Window Designs
Calvary Remodeling
Mystic, CTPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Kubala Home Improvement
Ludlow, MAPrice Transparency
Free assessment
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
ZN Construction
Canton, CTFree assessment
Good Customer Service
Timely Service
Educational Website
Price Transparency
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Closet & Storage Systems
Auburn, MAEducational Website
Free assessment
Good Customer Service
Price Transparency
Services Offered
Mirrors
Glass Showers
Window Replacement/Installation
Couto Construction
Warwick, RIFree assessment
Timely Service
Educational Website
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Window Repair
Energy-Efficient Options
H & J Homes Solutions LLC
Shrewsbury, MAPrice Transparency
Good Customer Service
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
N.E. Building & Restoration LLC
Attleboro, MAGood Customer Service
Price Transparency
Free assessment
Services Offered
Vinyl Frames
Window Replacement/Installation
Bert Falsetti's Home Improvement LLC
Shelton, CTServices Offered
Double-Hung
Vinyl Frames
Energy-Efficient Options
Window Replacement/Installation
Rogers Insulation Specialists
Framingham, MAFree assessment
Good Customer Service
Timely Service
Price Transparency
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Triple Pane Glass
Window Depot USA of Southern CT
Trumbull, CTGood Customer Service
Price Transparency
Free assessment
Timely Service
Educational Website
Services Offered
Glass Doors
Triple Pane Glass
Energy-Efficient Options
Window Replacement/Installation
Vinyl Frames
Bay Windows
Double-Hung
Advanced Window Systems LLC
Cromwell, CTEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Glass Showers
Double-Hung
Bay Windows
Glass Doors
Window Replacement/Installation
CARRIER ROOFING SIDING & WINDOWS
Webster, MAPrice Transparency
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Nu-Face Home Improvements
Berlin, CTPrice Transparency
Educational Website
Timely Service
Free assessment
Good Customer Service
Services Offered
Glass Doors
Double-Hung
Window Replacement/Installation
Glass Showers
Energy-Efficient Options
Calculate how much you can expect to pay for window installation and replacement in Willimantic, CT using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in Willimantic Saves You Money
By switching to energy-efficient windows, you can benefit in several ways, including:
- Reduce your carbon footprint: Because energy-efficient windows improve the insulation in your house, you can reduce your carbon footprint by about 12%, according to Energy Star.
- Protect your investment: Keeping your windows up to date is an important part of maintaining your property and its value, particularly if you have an older home.
- Protect your valuables: The low-emissivity coatings on many energy-efficient windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.
- Save on electricity bills: The Department of Energy estimates that heat gained or lost through windows makes up about 25-30% of energy use in your home. Switching to energy-efficient windows can help decrease that number, which helps you save $457 a year on your bills.
Estimated Cost of Window Replacement in Willimantic
Each window replacement company offers varying services and has varying price points based on a few factors.
How Much Do New Windows Cost?
Typically, Willimantic homeowners can expect their window replacements to range from $250 to $1,200. The average cost is at approximately $600. How much it will cost varies depending on several factors, including the location of your home, material, size, type, number of windows and more.
Bear in mind that energy-efficient windows may come at a higher price point, but Energy Star predicts the upgrade will save you between $101 and $583 per year when installing single-pane windows and between $27 and $197 per year when installing double-pane, clear glass windows. Your exact savings will vary based on your local climate, energy rates and individual home characteristics.
Costs will also vary depending on the material you choose for your window frames. Aluminum frames cost the least. They’re sturdy, light and maintenance-free, but offer poor insulation. Vinyl frames are somewhat expensive and provide good insulation. Composite frames made from wood fibers encased in plastic also offer 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?
In general, there are two types of window installation services you can get: full-frame and pocket installations.
Full-frame installations are necessary when you want a new style or your window has a lot of rot. With this service, your installers will replace the complete window, including the trim, frame and sill. A pocket installation means replacing a window within the existing frame, which tends to be cheaper than a full-frame installation.
If you’re hiring a reputable window installation company, your company can advise you on the best type for your project. In Willimantic, the decision will mostly be influenced by the efficiency of your home and how old your existing frames are.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
How We Choose the Best Window Installers in Willimantic
In our search to make your home improvements easier and more eco-friendly in Willimantic, the EcoWatch team chose the above companies as the top window installation companies in the city. Along with energy efficiency, we reviewed each installer and assigned rankings using the following methodology:
Service Area
Because 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 they wouldn’t be able to serve homeowners in Willimantic.
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 featured in our guide to make sure its technicians are well-qualified and that the company has gotten tons of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed trends in recent customer feedback to determine the companies with the most customer satisfaction. Customer satisfaction might be the factor we place the most value on, as it reflects the quality of services across most other categories, including quality of parts, cost, professionalism, warranty, quality of installation and more.
Cost
This one is a give-and-take: as with most services, cheap window installation companies are not going to provide the highest quality service. Still, we want to ensure we’re highlighting companies that offer a range of price and financing options so they’re accessible to most homeowners.
Warranty
As discussed previously, windows are a significant investment, so you’ll want to be certain that investment is well protected. Window installation companies that have lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Because of Willimantic’s climate, homeowners will want to mitigate water damage, rot and low efficiency. We factored in local experience to reflect the ability of Willimantic window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Willimantic, CT Window Replacement FAQs
What is the typical cost to replace windows in a home?
The national average cost to install one window is about $600 but can range from $200 to $1,200, based on a few different factors. The price is often influenced by the 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 most common types of replacement windows?
The most common types of windows for homes are awning windows, picture windows, double-hung and single-hung windows, bay windows, casement windows, slider windows and transom windows.
Can you replace your own windows?
Even though it is possible to install your own windows, doing so requires a lot of time and experience with home improvement projects. Hiring a professional can help ensure that the installation is done properly and that you can avoid spending the time and effort of doing it yourself.
Should I replace all my windows at the same time?
If your windows are more than 20 years old, it’s probably time to replace all of them. By that point, they are typically less efficient, leakier and/or more damaged than new windows. Doing your windows all at the same time will involve less paperwork and less time.
How long does it usually take to install windows?
Each window takes around 30 minutes to install depending on the kind of window. However, the window installation can be a two-day job — or more — if you need to have a lot of windows installed.