20 Best Window Companies in Stratford, CT (2025 Reviews)
If you’re thinking about upgrading to new windows, our list of the best window installation companies can help.
We analyzed all the top-rated window companies in Stratford 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
The EcoWatch team is all about finding solutions for eco-conscious homeowners in Stratford. If your windows are drafty or damaged, you could be sending 25-30% of your house’s heat or cool air right out of them.
Fortunately, helping you save money with upgraded windows also aligns with our goals of reducing energy usage for the environment.
We’ve made this guide on the best installation companies to help you in your research, so you can not only benefit from brand-new windows, but also save money on your power 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 Stratford
The EcoWatch team researched dozens of installers that service the Stratford area to find the top window installation companies that fit our standards. The providers in this article passed our review standards for energy-efficient offerings as well as customer service, local expertise, price 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 provides windows expertise in Stratford. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This company has 27 years of experience in the window installation industry, and it has proved to be one of the best companies in Stratford. Its reputation is backed by all the positive reviews on customer review websites.
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 provider for you.
Energy Efficiency of Window World WindowsWindow World is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Window World representative when inquiring about services.
How much does Window World cost in Stratford?Prices aren’t listed on Window World’s website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate information, you can ask for a quote on the company’s website.

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 Stratford. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has 27 years of experience in the window installation industry, and it has proved to be one of the best companies in Stratford. Its reputation is backed by all the positive reviews on customer review websites.
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 provider for you.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Stratford?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. If you’d like more accurate information, you can ask for a quote on the company’s website.

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 Stratford. 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 window installation industry, and it has proved to be one of the best companies in Stratford. Its reputation is backed by all the positive reviews on customer review websites.
If you’re looking for a company that installs windows and doors at businesses across the Eastern U.S, this may be the perfect provider for you.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Aeroseal representative when inquiring about services.
How much does Aeroseal Windows cost in Stratford?Prices aren’t listed on Aeroseal’s website, but it provides high-quality windows at a competitive price point. If you’d like more accurate information, you can ask for a quote on the company’s website.

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 Stratford. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. This company has 16 years of experience in the window installation industry, and it has proved to be one of the best companies in Stratford. Its reputation is backed by all the positive reviews on customer review websites.
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 provider for you.
Energy Efficiency of Window Nation WindowsWindow Nation is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Window Nation representative when inquiring about services.
How much does Window Nation cost in Stratford?Prices aren’t listed on Window Nation’s website, but based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. If you’d like more accurate information, you can ask for a quote on the company’s website.
We strive to stay 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 Stratford
Renewal by Andersen - Branford
Branford, CTGood Customer Service
Free assessment
Educational Website
Price Transparency
Services Offered
Glass Doors
Bay Windows
Window Replacement/Installation
Skylights
Double-Hung
Power Home Remodeling
Trumbull, CTTimely Service
Price Transparency
Good Customer Service
Free assessment
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Window Nation
Wallingford, CTEducational Website
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Custom Window Designs
Bay Windows
Glass Doors
Double-Hung
Window Depot USA of Southern CT
Trumbull, CTPrice Transparency
Timely Service
Free assessment
Good Customer Service
Educational Website
Services Offered
Triple Pane Glass
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Bay Windows
Double-Hung
Vinyl Frames
Bert Falsetti's Home Improvement LLC
Shelton, CTServices Offered
Vinyl Frames
Double-Hung
Window Replacement/Installation
Energy-Efficient Options
United Home Experts
Norwalk, CTGood Customer Service
Price Transparency
Free assessment
Educational Website
Services Offered
Fiberglass Frames
Window Replacement/Installation
Flawless Glass & Mirror LLC
Holbrook, NYCustomized glass options
Free assessment
Owner-operated small business
Good Customer Service
Educational Website
Price Transparency
Free in-home consultation
Services Offered
Mirrors
Glass Showers
Window Replacement/Installation
Greenwich Windows Replacement
Greenwich, CTGood Customer Service
Free assessment
Educational Website
Price Transparency
Services Offered
Bay Windows
Double-Hung
Window Replacement/Installation
Doors & Windows
Albertson, NYSunday availability
Online product shopping
Price Transparency
Free in-home or virtual consultation
Educational Website
Good Customer Service
Free assessment
Services Offered
Vinyl Frames
Window Replacement/Installation
Wood Frames
Bay Windows
Double-Hung
Paramount Gallery
West Hartford, CTPrice Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Custom Window Designs
Glass Doors
M & R Windows
Bronx, NYTimely Service
Price Transparency
Services Offered
Window Replacement/Installation
Putnam Windows Inc.
Cold Spring, NYGood Customer Service
Educational Website
Free assessment
Price Transparency
Services Offered
Wood Frames
Vinyl Frames
Window Replacement/Installation
Glass Doors
ZN Construction
Canton, CTPrice Transparency
Free assessment
Educational Website
Timely Service
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Edge Remodeling, Inc.
Franklin Square, NYLabor warranties available
Family-owned and operated
Free same-day estimates
Good Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Parco Home Improvement Corp.
Franklin Square, NYPrice Transparency
Free assessment
Services Offered
Energy-Efficient Options
Vinyl Frames
Window Replacement/Installation
Aspen Home Remodeling, LLC.
Oradell, NJGood Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Skylights
Window Replacement/Installation
Energy-Efficient Options
Cityproof Soundproof Windows
Long Island City, NYTimely Service
Price Transparency
Educational Website
Over 50,000 installations completed
Trademark soundproof Citiwindows
Good Customer Service
No-construction services available
Free assessment
Services Offered
Energy-Efficient Options
Custom Window Designs
Window Replacement/Installation
Big Dawg Home Improvements
South Windsor, CTPrice Transparency
Good Customer Service
Free assessment
Timely Service
Services Offered
Window Repair
Skylights
Window Replacement/Installation
Energy-Efficient Options
Smithtown Window Replacement and Doors
Smithtown, NYGood Customer Service
Energy-efficient windows and doors
Family-owned and operated
Weekend availability
Price Transparency
Free assessment
Educational Website
Services Offered
Double-Hung
Wood Frames
Metal Frames
Energy-Efficient Options
Glass Showers
Triple Pane Glass
Fiberglass Frames
Window Replacement/Installation
Window Repair
Bay Windows
Storm/Impact Windows
Glass Doors
Tempered Glass
Vinyl Frames
Custom Window Designs
Bencar Building Systems LLC
Wallingford, CTGood Customer Service
Services Offered
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Stratford, 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 Stratford Saves You Money
There are quite a few benefits of switching to energy-efficient windows. Some reasons you may want to consider making the switch are the following:
- Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out harmful 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 leaky. Upgrading your windows is an important part of maintaining your property and its value.
- Reduce your carbon footprint: Since energy-efficient windows improve the insulation in your house, you can cut your carbon footprint by about 12%, according to Energy Star.
- Save money on electricity bills: After you install 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 home.
Estimated Cost of Window Replacement in Stratford
Windows come in varying styles, purposes and shapes, so costs and services will vary tremendously based on several factors. Below, we detail the typical cost and services that you’ll find from window installers.
How Much Do New Windows Cost?
The typical cost to install a single window is about $600 but can range anywhere from $200 to $1,200. But costs will differ significantly depending on the number of windows you need, your location, the quality of your products and the current condition of your home. Many window companies also offer replacement door installations and other add-ons like shutters, coating, baths and more. Additional services will increase your overall project costs.
It’s also worth keeping in mind that energy-efficient windows will almost always cost more initially, but Energy Star estimates that upgrading the windows on your Stratford home can mean an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 each year for double-pane windows. How much you’ll save by switching to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
Getting free quotes from multiple installers is the best way to figure out which one will work best for your budget.
What Services do Window Installers Offer?
The first step of a window installation is to decide whether you need a full-frame or pocket installation.
A full-frame installation replaces the full window, including the windowsill, frame, trim and the window panes. Because this kind of installation requires more time, it will be more expensive than a pocket installation. Pocket installations (also known as retrofits) are when you replace a window while leaving the existing frame. Pocket installations are on the simpler end and won’t carry as large a bill, but you can’t do this type of installment if you have any pre-existing rot or water damage.
If you’re still trying to decide which type of installation you should get, you can talk to your provider and get their advice. The choice mostly depends on the age of your window frames and if there’s any damage.
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 Stratford
EcoWatch is different from other reviewers since we’re examining these companies through a sustainability lens. We’ve evaluated the top window installers in Stratford mostly based on their energy efficient offerings, as it’s the most sustainable option and the best one for homeowners. Energy-efficient windows can lower electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
Because this is a guide for Stratford, we only included companies that provide services to the city. There are certainly reputable providers that didn’t make the cut because of the low odds that they would serve the average homeowner in Stratford.
Work Quality
When choosing new windows, the quality and variety of services can often play just as important of a role in insulation and performance as the brand you choose. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
Customer feedback is another very important review factor. If the majority of customers don’t have nice feedback about their service from a certain window installation company, it won’t be featured on EcoWatch.
Cost
Cheaper windows don’t necessarily 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 points to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
Protecting your investment in new windows is important to many homeowners. That’s why window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Because of Stratford’s climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of Stratford window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Stratford, CT Window Replacement FAQs
How much does window installation cost?
The national average cost of replacing a single window is about $600 but can range between $200 and $1,200, based on several factors. The price is usually dependent on the type and material of the window, the size of the window and the location of your property. Also, keep in mind that energy-efficient windows may cost more initially but can save you hundreds of dollars a year in energy bills.
Which type of window is the best?
A window’s energy efficiency depends on a number of factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient since they are certified by the U.S. Department of Energy.
What services do window replacement companies do?
Window installation companies cover the entire process — from replacing your old windows with brand-new ones to cleaning up afterward. Additionally, many companies offer window manufacturing, customization and repairs.
How do you know it’s time to replace your windows?
Windows typically have a lifespan of about 20 to 30 years, but anytime you see damage on your windows, it’s a good time to have them checked by an expert to see if they need any repairs or replacements.
Should I replace all my windows at the same time?
If you want to get more efficient windows and save money on energy costs, replacing all your windows at the same time is the only way to gain that benefit. However, if you have only a few windows that are damaged or drafty, you can replace just those.