20 Best Window Companies in Harwinton, CT (2023 Reviews)
Thinking about replacing your home's windows? We've got you covered in this guide to the top window installation companies.
We analyzed all the top-rated window companies in Harwinton and selected the best 20 based on:
-
Customer reviews
-
Window installation expertise
-
Popularity with home-owners like you
Please enter a valid 5-digit zip code!

Updated September 15, 2023
Why you can trust EcoWatch
The EcoWatch Reviews team is all about helping Harwinton homeowners make their homes more eco-friendly. Damaged or outdated windows can cost you in energy bills.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.
Replacement windows improve the insulation in your home, not only making you more comfortable during extreme temperatures, but also saving you some money and helping the environment.
We've compiled this guide on the best installation companies to help you in your search, so you can not only enjoy brand new windows, but also save money on your power bills.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Harwinton
The EcoWatch team assessed dozens of installers across the country to find the best window replacement companies for our readers. The companies we've mentioned in this article passed our review standards for energy-efficient offerings as well as local expertise, price, customer service and beyond.

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 offers windows expertise in Harwinton. Window World has around 27 years of experience in the window replacement business. Many positive reviews from customers online back the company's reputation.
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 windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in Harwinton?While pricing information is not available on Window World’s website, it's known for offering some of the most affordable window installations around. You can inquire about a free quote on its website for more information about the cost.

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 offers the best availability in Harwinton. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has 27 years of experience in the windows industry, and it has proved to be one of the most respected companies in Harwinton.
It has established itself as a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen 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 make sure to ask your Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Harwinton?Although pricing is not 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. The best way to get more accurate information is to request a free quote from the company.

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 has the best window installation for businesses in Harwinton. This company has 23 years of experience in the window installation 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 WindowsThere are a wide range of window types that Aeroseal Windows offers, some of which are Energy Star products. The company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more.
How much does Aeroseal Windows cost in Harwinton?Aeroseal does not display prices on its website, but it provides high-quality windows at a competitive price point. You can ask for a free quote on its website for more information about the cost.

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 offers the best residential windows in Harwinton. Window Nation has around 16 years of experience in the window replacement business. Many positive reviews from customers online back the company's reputation.
Window Nation may be the company for you if you want one 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 windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window Nation cost in Harwinton?While pricing information 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. You can inquire about a free quote on its website for more information about the cost.
We strive to be unbiased and transparent by mentioning pros and cons for each company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Companies in Harwinton
Renewal by Andersen - Southern New England
Windsor Locks, CT-
Price Transparency
-
Good Customer Service
-
Free assessment
-
Educational Website
Services Offered
-
Commercial Windows
-
Stained Glass
-
Custom Window Designs
-
Window Replacement
-
Sliding Glass
-
Double-Hung
-
Glass Showers
-
Residential Windows
Window World of Hartford
Manchester, CT-
Good Customer Service
-
Price Transparency
-
Timely Service
-
Educational Website
-
Free assessment
Services Offered
-
Window Replacement
-
Custom Window Designs
-
Double-Hung
-
Fast Delivery
-
Bay Windows
-
Sliding Glass
-
Commercial Windows
-
Window Repair
-
Residential Windows
Window Nation
Wallingford, CT-
Price Transparency
-
Good Customer Service
-
Educational Website
-
Free assessment
Services Offered
-
Window Replacement
-
Bay Windows
-
Custom Window Designs
-
Stained Glass
-
Residential Windows
-
Double-Hung
-
Energy-Efficient Options
-
Sliding Glass
Crown Home Improvement LLC
Torrington, CT-
Timely Service
-
Price Transparency
-
Good Customer Service
-
Educational Website
Services Offered
-
Residential Windows
-
Fast Delivery
-
Window Replacement
-
Commercial Windows
-
Custom Window Designs
Sullivan's Premier Glass
Winsted, CTServices Offered
-
Residential Windows
-
Custom Window Designs
-
Window Replacement
-
Window Repair
-
Commercial Windows
-
Full-Service Installations
-
Glass Showers
J.C. Tonnotti Window Company
Southington, CT-
Timely Service
-
Good Customer Service
-
Educational Website
Services Offered
-
Residential Windows
-
Commercial Windows
-
Aluminum Window Frames
-
Custom Window Designs
-
Energy-Efficient Options
-
Window Replacement
Home Services at The Home Depot
Waterbury, CT-
Price Transparency
-
Free assessment
-
Good Customer Service
-
Educational Website
Services Offered
-
Fast Delivery
-
Window Replacement
-
Stained Glass
-
Double-Hung
-
Residential Windows
-
Glass Showers
-
Commercial Windows
-
Custom Window Designs
Yargueta Construction
Newington, CT-
Timely Service
-
Educational Website
-
Free assessment
-
Price Transparency
-
Good Customer Service
Services Offered
-
Double-Hung
-
Residential Windows
-
Full-Service Installations
-
Commercial Windows
-
Glass Showers
-
Custom Window Designs
-
Window Replacement
Town & Country Glass Shop llc
Woodbury, CT-
Price Transparency
-
Free assessment
-
Good Customer Service
-
Educational Website
Services Offered
-
Window Replacement
-
Custom Window Designs
-
Glass Showers
-
Residential Windows
Hometech Sunrooms & Remodeling
Southington, CT-
Price Transparency
-
Free assessment
-
Good Customer Service
Services Offered
-
Full-Service Installations
-
Custom Window Designs
-
Window Replacement
-
Fast Delivery
-
Glass Showers
-
Residential Windows
Coastal Construction Group LLC
Cheshire, CT-
Price Transparency
-
Good Customer Service
-
Timely Service
-
Free assessment
-
Educational Website
Services Offered
-
Stained Glass
-
Fast Delivery
-
Window Replacement
-
Residential Windows
-
Custom Window Designs
-
Double-Hung
-
Glass Showers
Highland Window Company, LLC
West Hartford, CT-
Good Customer Service
-
Free assessment
Services Offered
-
Residential Windows
-
Window Replacement
-
Double-Hung
Finestra Windows & Installation
West Hartford, CT-
Educational Website
-
Price Transparency
-
Free assessment
Services Offered
-
Residential Windows
-
Double-Hung
-
Glass Showers
-
Custom Window Designs
-
Window Replacement
-
Tempered Glass
Nu-Face Home Improvements
Berlin, CT-
Good Customer Service
-
Price Transparency
-
Free assessment
-
Educational Website
Services Offered
-
Custom Window Designs
-
Window Replacement
-
Double-Hung
-
Commercial Windows
-
Residential Windows
-
Glass Showers
-
Fast Delivery
-
Energy-Efficient Options
A-1 Windows & Doors LLC
Simsbury, CT-
Free assessment
-
Price Transparency
-
Good Customer Service
-
Timely Service
Services Offered
-
Residential Windows
-
Commercial Windows
-
Window Replacement
-
Window Repair
-
Custom Window Designs
Innerglass Window Systems
Herman Dr, CT-
Free assessment
-
Price Transparency
Services Offered
-
Tempered Glass
-
Stained Glass
-
Commercial Windows
-
Window Replacement
-
Custom Window Designs
-
Residential Windows
-
Energy-Efficient Options
Harris Home Improvement
Granby, CT-
Educational Website
-
Free assessment
-
Good Customer Service
-
Timely Service
-
Price Transparency
Services Offered
-
Double-Hung
-
Custom Window Designs
-
Glass Showers
-
Commercial Windows
-
Window Repair
-
Residential Windows
-
Window Replacement
-
Fast Delivery
Peoples Products - HR40 Windows
Newington, CT-
Free assessment
-
Price Transparency
-
Good Customer Service
-
Educational Website
Services Offered
-
Window Replacement
-
Aluminum Window Frames
-
Energy-Efficient Options
-
Custom Window Designs
-
Commercial Windows
-
Residential Windows
-
Fast Delivery
Mainville Windows & Doors
Newington, CT-
Price Transparency
-
Free assessment
Services Offered
-
Residential Windows
-
Aluminum Window Frames
-
Glass Showers
-
Custom Window Designs
-
Sliding Glass
-
Window Replacement
-
Commercial Windows
-
Bay Windows
ProEdge Remodeling by Custom Built
Windsor, CT-
Good Customer Service
-
Educational Website
-
Price Transparency
-
Free assessment
Services Offered
-
Energy-Efficient Options
-
Custom Window Designs
-
Commercial Windows
-
Bay Windows
-
Residential Windows
-
Sliding Glass
-
Fast Delivery
-
Double-Hung
-
Window Replacement
Calculate how much you can expect to pay for window installation and replacement in Harwinton, 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 Harwinton Saves You Money
By switching to energy-efficient windows, you can take advantage of several benefits, such as:
- Save money on energy bills: According to the Department of Energy, heat gained or lost through windows makes up around 25-30% of household energy use. Switching to energy-efficient models can help decrease that amount, therefore saving you about 12% more on your bills.
- Protect your investment: Keeping your windows up to date is an important part of maintaining your property and its real estate value, especially if you have an older home.
- Better temperature control in your home: Energy-efficient windows can cut back on the amount of heat lost through your windows when heating your home.
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which filter out harmful UV rays, reducing fading of your furniture, carpet and other valuables.
Estimated Cost of Window Replacement in Harwinton
When looking into window installation, each company provides varying services and costs. Let's look at some typical costs and services.
How Much Do New Windows Cost?
Though the typical of installing one window is around $600, it can range from $200 to $1,200. But costs will differ considerably based on the number of windows you need, the quality of your products, the current condition of your home and your location. Many window companies also offer replacement door installations and other add-ons like shutters, baths, coating and more. Additional services will increase your overall project costs.
It's also worth keeping in mind that energy-efficient windows will typically cost more upfront, but Energy Star estimates that switching out the windows on your Harwinton home translates to an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. The amount of money you'll save by installing energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.
Costs will also vary depending on the material of your frame. Aluminum frames cost the least. They're sturdy, light and easy to maintain, but provide poor insulation. Vinyl frames are somewhat expensive and provide good insulation. Composite frames made using 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?
There are generally two kinds of window replacement services: full-frame and pocket installations.
Full-frame installations are usually recommended when you want a new style or your window has significant rot. With this service, your professionals will replace the complete window, including the sill, frame and trim. Pocket installations (or retrofits) involve installing a new window within the existing frame, which makes pocket installations less labor-intensive and costly. However, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.
Your window installer should be able to help you choose which type of installation you should get.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Harwinton
In our search to make your home improvements easier and more eco-friendly in Harwinton, the EcoWatch Reviews team evaluated dozens of companies before settling on these. Along with energy efficiency, we reviewed several window installers in Harwinton and ranked them based on the following methodology:
Service Area
Because this is a guide for Harwinton, we only included companies that provide services to the city. There are other reputable providers that didn't make the list because they wouldn't be able to serve homeowners in Harwinton.
Work Quality
When choosing new windows, the quality and range of services often plays just as important of a role in overall efficiency and performance as the brand you choose. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
Another self-explanatory yet super important review factor is customer feedback. If most customers don't have good feedback about their experience with a certain company, you won't see it featured on EcoWatch.
Cost
This one is a give-and-take: as with most services, cheap window installers may not provide the most quality service. Still, we want to ensure we're highlighting companies that provide a spectrum of price and financing options so they're accessible to most homeowners.
Warranty
Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies that have lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have been in the industry for a while. Window installation companies that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.
Harwinton, CT Window Replacement FAQs
What is the typical cost to replace windows in a home?
The national average cost of installing one window is around $600 but can range between $200 and $1,200, depending on a few different factors. The price is generally dependent on 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?
The most common types of windows for homes include: double-hung and single-hung windows, transom windows, picture windows, casement windows, awning windows, slider windows and bay windows.
What do window installers do?
Window installation companies will do the entire process — from replacing your old windows with brand new ones to cleaning up afterward. In addition, many companies offer window manufacturing, customization and repairs.
How long does window installation usually take?
Each window takes about 30 minutes to install depending on the type of window. However, the window installation can take two days or more if you have a lot of windows that need to be installed.