20 Best Window Companies in Stamford, CT (2025 Reviews)
Are you looking to upgrade your windows? Our list of the top window installation companies can help you narrow down which one to choose.
We analyzed all the top-rated window companies in Stamford 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 guide on the top window installation companies in Stamford may not seem like the most compelling article on EcoWatch, but trust us, windows have a more direct impact on your life than you might think. Poor windows can cut your home’s energy efficiency by up to 30%, according to the Department of Energy. In Stamford, that’s around $441 per year that you could save on your electricity bills by making the switch.
Installing efficient windows on your home can help you save money each month on your energy bills — and you can help the environment, too.
We’ve put together a 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 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 Stamford
The EcoWatch team researched many window installation companies across Stamford to narrow our list down to the best ones. The companies we’ve mentioned 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 Stamford. Window World has over 27 years of experience in the industry, and it currently provides services to 200 locations nationwide. Hundreds of positive reviews on customer review websites back the provider's reputation.
It has established itself as 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 available from Window World, 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 Stamford?Window World does not outline prices on its website, but it's known for offering some of the most affordable window installations around. For more detailed information on pricing, you can request a quote from the company.

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 Stamford. Andersen has over 27 years of experience in the industry, and it currently provides services to nearly every state except Mississippi and West Virginia. Hundreds of positive reviews on customer review websites back the provider's reputation.
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 WindowsThere are a wide variety of window types available from Renewal by Andersen, 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 Stamford?Andersen does not outline prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. For more detailed information on pricing, you can request a 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 provides the best window installation for businesses in Stamford. Aeroseal has over 23 years of experience in the industry, and it currently provides services to 13 states and Washington D.C. Hundreds of positive reviews on customer review websites back the provider'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 variety of window types available from Aeroseal Windows, 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 Stamford?Aeroseal does not outline prices on its website, but it provides high-quality windows at a competitive price point. For more detailed information on pricing, you can request a quote from the company.

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 Stamford. Window Nation has over 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. Hundreds of positive reviews on customer review websites 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 WindowsThere are a wide variety of window types available from Window Nation, some of which are Energy Star products. 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 Stamford?Window Nation does not outline prices on its 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. For more detailed information on pricing, you can request a quote from the company.
Please note that the companies in this section are national, which means the quality of the service may depend on your local crew. We have tried to stay unbiased and transparent by mentioning pros and cons for each provider.
More Window Companies in Stamford
Renewal by Andersen of Long Island
Farmingdale, NYGood Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Glass Doors
Skylights
Double-Hung
Bay Windows
Window Replacement/Installation
Power Home Remodeling
Melville, NYGood Customer Service
Timely Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Greenwich Windows Replacement
Greenwich, CTPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Double-Hung
Bay Windows
Window Replacement/Installation
United Home Experts
Norwalk, CTFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Fiberglass Frames
M & R Windows
Bronx, NYTimely Service
Price Transparency
Services Offered
Window Replacement/Installation
Doors & Windows
Albertson, NYPrice Transparency
Educational Website
Online product shopping
Good Customer Service
Free in-home or virtual consultation
Sunday availability
Free assessment
Services Offered
Window Replacement/Installation
Double-Hung
Wood Frames
Bay Windows
Vinyl Frames
Window Depot USA of Southern CT
Trumbull, CTFree assessment
Good Customer Service
Price Transparency
Timely Service
Educational Website
Services Offered
Glass Doors
Energy-Efficient Options
Window Replacement/Installation
Vinyl Frames
Triple Pane Glass
Double-Hung
Bay Windows
Edge Remodeling, Inc.
Franklin Square, NYLabor warranties available
Family-owned and operated
Price Transparency
Free same-day estimates
Good Customer Service
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
Educational Website
Price Transparency
Free assessment
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Skylights
Bert Falsetti's Home Improvement LLC
Shelton, CTServices Offered
Energy-Efficient Options
Vinyl Frames
Double-Hung
Window Replacement/Installation
Cityproof Soundproof Windows
Long Island City, NYOver 50,000 installations completed
Free assessment
Timely Service
Educational Website
No-construction services available
Price Transparency
Good Customer Service
Trademark soundproof Citiwindows
Services Offered
Custom Window Designs
Window Replacement/Installation
Energy-Efficient Options
Flawless Glass & Mirror LLC
Holbrook, NYGood Customer Service
Free assessment
Free in-home consultation
Customized glass options
Price Transparency
Owner-operated small business
Educational Website
Services Offered
Mirrors
Window Replacement/Installation
Glass Showers
HDL Construction LLC — Windows replacement, Roofing, Roof service, Siding replacement, Chimney, Deck, Masonry
Hasbrouck Heights, NJ24-hour emergency service
Good Customer Service
Price Transparency
Free in-home consultation
Free assessment
Educational Website
Saturday and Sunday availability
Services Offered
Window Replacement/Installation
Putnam Windows Inc.
Cold Spring, NYPrice Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Vinyl Frames
Wood Frames
Glass Doors
F5 Remodeling
Rutherford, NJGood Customer Service
Full-service installation
Minority-owned and operated
Price Transparency
Family-owned and operated
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Frank Conforti Contracting
North Haledon, NJEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Window Repair
Skylights
Energy-Efficient Options
Bloomfield Window and Door Company
Bloomfield, NJFree assessment
Services Offered
Screen Repair
Window Replacement/Installation
Ben Window & Glass
Brooklyn, NYWide selection
Educational Website
Price Transparency
Foggy window repair
Weekend availability
Free assessment
Services Offered
Window Repair
Window Replacement/Installation
MK Window Treatments
Greenwich, CTGood Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Stamford, 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 Stamford Saves You Money
Upgrading to energy-efficient windows can help improve the comfort of your home and help you save on power bills. Here's more information on how switching out your windows could help you:
- Save money on energy bills: Upgrading to energy-efficient windows lowers your energy bills by about 12% because you use less energy.
- Reduce your carbon footprint: In Stamford, you can lower your indirect greenhouse gas emissions by about 147 pounds per year once you install energy-efficient windows.
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only insulate your home better, but also filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
- Protect your investment: When your home is on the older side, your windows could also be outdated or damaged. Keeping your windows up to date is an important part of maintaining your property and its value.
Estimated Cost of Window Replacement in Stamford
When researching window installation, each company offers varying services and costs. Let’s look at some typical costs and services.
How Much Do New Windows Cost?
Generally, homeowners in Stamford can expect that most window installations will cost between $250 and $1,200, with the most common installations sitting at around $600. But prices vary considerably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also provide door installations, which will make your project cost more.
It’s also worth keeping in mind that energy-efficient windows will usually cost more upfront, but Energy Star predicts that switching out the windows on your Stamford home translates to 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. The amount of money you’ll save by upgrading to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
Something else that influences the total cost is the material of the frame you pick. Aluminum frames are usually the least pricey and are sturdy and light, but they offer poor insulation. On the other hand, wood frames are the most expensive, as they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation as well and cost somewhere between the other two.
What Services do Window Installers Offer?
Generally, there are two kinds of window replacement services companies offer: full-frame and pocket installations.
A full-frame installation replaces the complete window, including the windowsill, frame, trim and the window panes. As this kind of installation is more involved, it will be more expensive than a pocket installation. Pocket installations are simpler and won’t cost as much because they entail merely replacing the window within its existing frame. But if the frame has any damage or rot, you may have to get a full-frame installation instead.
Your window installation company can recommend the best type for your project. In Stamford, the choice will mostly depend on how much damage there is currently 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 Stamford
EcoWatch reviews differ from most reviews because we’re examining these companies through a sustainability lens. Along with energy efficiency, we assessed each installer and assigned rankings based on the following methodology:
Service Area
Because this is a guide for Stamford, we paid more attention to companies that cover the city. There are other reputable providers that didn’t make the list because they wouldn’t be able to serve homeowners in Stamford.
Work Quality
We’re certain that you’re not looking for a company to do a shoddy job installing windows. We’ve vetted each company on this list to ensure its contractors are well-qualified and that the company has gotten tons of positive customer feedback to vouch for its service.
Customer Reviews
Another self-explanatory yet super important review factor is customer feedback. If the majority of customers don’t have nice feedback about their service from a certain installer, it won’t be featured on EcoWatch.
Cost
Cheaper windows don’t necessarily mean better windows, but we know many of our readers would like to keep costs low when possible. When analyzing providers’ prices, we awarded higher points to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
As discussed previously, windows are a substantial investment, so you’ll want to make sure that investment is well protected. Window installation companies that give you 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 proven 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.
Stamford, CT Window Replacement FAQs
What is the average cost to install new windows?
The average cost of installing one window can range between $450 and $650. There are many factors that influence the cost, such as the materials used in designing the windows, your property’s location, styles and sizes of windows, how energy-efficient the windows are, local labor costs and the number of windows.
What are the most common types of replacement windows?
There are several different types of windows you can get for your home, including awning windows, picture windows, bay windows, slider windows, transom windows, double-hung and single-hung windows and casement windows.
Can I replace my own windows?
Even though you can 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 won’t have to spend the time and effort to do it yourself.
Should I replace my windows all at once?
If you’re upgrading your windows to get more efficient windows, replacing all of your windows at once is the only way to see a noticeable difference. On the other hand, if you have only a few windows that are broken or leaky, you can replace just those.