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
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated January 24, 2025

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

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.

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Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • 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 logo
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon 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 Windows

There 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 logo
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon 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 Windows

There 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 logo
Best for Businesses

Aeroseal Windows

★★★★★
BBB Rating: A+
Locations: Regional
Founded: 1999
Pros:
  • Pros icon Many years of experience
  • Pros icon Great industry reputation
  • Pros icon Low number of customer complaints
  • Pros icon Manufactures products in-house
  • Pros icon Custom Designs
Cons:
  • Pros icon No lifetime warranty
  • Pros icon 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 Windows

There 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 logo
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon 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 Windows

There 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, NY
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Doors
  • Service icon Skylights
  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation

Website: https://www.renewalbyandersen.com/window-company/800-long-island-ny/retailer
Address: 2029 New Hwy, Farmingdale, NY 11735
Phone: (631) 843-1713

Power Home Remodeling

Melville, NY
4.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options

Website: https://powerhrg.com/
Address: 1660 Walt Whitman Rd #140, Melville, NY 11747
Phone: (631) 339-7268

Greenwich Windows Replacement

Greenwich, CT
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation

Website: http://www.greenwichwr.com/
Address: 777 West Putnam Avenue, Greenwich, CT 06830
Phone: (203) 424-3446

United Home Experts

Norwalk, CT
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Fiberglass Frames

Website: https://unitedhomeexperts.com/united-home-experts-norwalk-ct-06854-siding-roofing-windows-doors/
Address: 50 Washington St, Norwalk, CT 06854
Phone: (203) 718-0597

M & R Windows

Bronx, NY
5.0
★★★★★
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation

Website: http://mandrwindows.com/
Address: 4510 Bullard Ave, Bronx, NY 10470
Phone: (718) 652-1300

Doors & Windows

Albertson, NY
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Online product shopping
  • Pros icon Good Customer Service
  • Pros icon Free in-home or virtual consultation
  • Pros icon Sunday availability
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Wood Frames
  • Service icon Bay Windows
  • Service icon Vinyl Frames

Website: http://usdoorswindows.com/
Address: 830 Willis Ave, Albertson, NY 11507
Phone: (516) 517-4328

Window Depot USA of Southern CT

Trumbull, CT
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames
  • Service icon Triple Pane Glass
  • Service icon Double-Hung
  • Service icon Bay Windows

Website: http://windowdepotsouthernct.com/
Address: 5726 Main St STe 2a, Trumbull, CT 06611
Phone: (203) 309-6027

Edge Remodeling, Inc.

Franklin Square, NY
5.0
★★★★★
  • Pros icon Labor warranties available
  • Pros icon Family-owned and operated
  • Pros icon Price Transparency
  • Pros icon Free same-day estimates
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: http://edgeremodelinginc.com/
Address: 1102 Hempstead Turnpike, Franklin Square, NY 11010
Phone: (516) 860-8630

Parco Home Improvement Corp.

Franklin Square, NY
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Vinyl Frames
  • Service icon Window Replacement/Installation

Website: http://www.kpsearch.com/DF/Parco/all.asp
Address: 424 Dogwood Ave, Franklin Square, NY 11010
Phone: (516) 560-7626

Aspen Home Remodeling, LLC.

Oradell, NJ
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Skylights

Website: https://www.aspenhomeremodelingllc.com/
Address: 700 Kinderkamack Rd #101, Oradell, NJ 07649
Phone: (201) 994-5354

Bert Falsetti's Home Improvement LLC

Shelton, CT
5.0
★★★★★

    Services Offered

    • Service icon Energy-Efficient Options
    • Service icon Vinyl Frames
    • Service icon Double-Hung
    • Service icon Window Replacement/Installation

    Website: http://bertfalsettillc.wix.com/falsetti
    Address: 56 Woodfield Dr, Shelton, CT 06484
    Phone: (203) 258-5177

    Cityproof Soundproof Windows

    Long Island City, NY
    5.0
    ★★★★★
    • Pros icon Over 50,000 installations completed
    • Pros icon Free assessment
    • Pros icon Timely Service
    • Pros icon Educational Website
    • Pros icon No-construction services available
    • Pros icon Price Transparency
    • Pros icon Good Customer Service
    • Pros icon Trademark soundproof Citiwindows

    Services Offered

    • Service icon Custom Window Designs
    • Service icon Window Replacement/Installation
    • Service icon Energy-Efficient Options

    Website: https://www.cityproof.com/
    Address: 10-11 43rd Ave, Long Island City, NY 11101
    Phone: (718) 786-1600

    Flawless Glass & Mirror LLC

    Holbrook, NY
    5.0
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Free assessment
    • Pros icon Free in-home consultation
    • Pros icon Customized glass options
    • Pros icon Price Transparency
    • Pros icon Owner-operated small business
    • Pros icon Educational Website

    Services Offered

    • Service icon Mirrors
    • Service icon Window Replacement/Installation
    • Service icon Glass Showers

    Website: http://flawlessglassandmirror.com/
    Address: 1350 Lincoln Ave # 10, Holbrook, NY 11741
    Phone: (631) 275-0485

    HDL Construction LLC — Windows replacement, Roofing, Roof service, Siding replacement, Chimney, Deck, Masonry

    Hasbrouck Heights, NJ
    5.0
    ★★★★★
    • Pros icon 24-hour emergency service
    • Pros icon Good Customer Service
    • Pros icon Price Transparency
    • Pros icon Free in-home consultation
    • Pros icon Free assessment
    • Pros icon Educational Website
    • Pros icon Saturday and Sunday availability

    Services Offered

    • Service icon Window Replacement/Installation

    Website: http://www.hdlconstructionnj.com/
    Address: 184 Boulevard Apt A, Hasbrouck Heights, NJ 07604
    Phone: (201) 375-5437

    Putnam Windows Inc.

    Cold Spring, NY
    5.0
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Good Customer Service
    • Pros icon Free assessment
    • Pros icon Educational Website

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Vinyl Frames
    • Service icon Wood Frames
    • Service icon Glass Doors

    Website: http://putnamwindows.com/
    Address: 2560 US-9, Cold Spring, NY 10516
    Phone: (845) 265-4382

    F5 Remodeling

    Rutherford, NJ
    5.0
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Full-service installation
    • Pros icon Minority-owned and operated
    • Pros icon Price Transparency
    • Pros icon Family-owned and operated
    • Pros icon Free assessment
    • Pros icon Educational Website

    Services Offered

    • Service icon Window Replacement/Installation

    Website: https://f5remodeling.com/
    Address: 8 Station Square #2, Rutherford, NJ 07070
    Phone: (551) 271-0650

    Frank Conforti Contracting

    North Haledon, NJ
    5.0
    ★★★★★
    • Pros icon Educational Website
    • Pros icon Price Transparency
    • Pros icon Free assessment
    • Pros icon Good Customer Service

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Window Repair
    • Service icon Skylights
    • Service icon Energy-Efficient Options

    Website: https://confortiroofingnj.com/
    Address: 84 Walray Ave, North Haledon, NJ 07508
    Phone: (973) 519-2126

    Bloomfield Window and Door Company

    Bloomfield, NJ
    5.0
    ★★★★★
    • Pros icon Free assessment

    Services Offered

    • Service icon Screen Repair
    • Service icon Window Replacement/Installation

    Website: http://www.bloomfieldwindowanddoor.com/
    Address: 452 Broad St, Bloomfield, NJ 07003
    Phone: (201) 889-5864

    Ben Window & Glass

    Brooklyn, NY
    5.0
    ★★★★★
    • Pros icon Wide selection
    • Pros icon Educational Website
    • Pros icon Price Transparency
    • Pros icon Foggy window repair
    • Pros icon Weekend availability
    • Pros icon Free assessment

    Services Offered

    • Service icon Window Repair
    • Service icon Window Replacement/Installation

    Website: https://benwindowglass.com/
    Address: 431 Bay Ridge Pkwy, Brooklyn, NY 11209
    Phone: (347) 799-0912

    MK Window Treatments

    Greenwich, CT
    4.9
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Free assessment

    Services Offered

    • Service icon Window Replacement/Installation

    Website: http://www.mkwindowtreatments.com/
    Address: 270 Mason St, Greenwich, CT 06830
    Phone: (203) 900-1500
    Stamford Window Cost Calculator

    Calculate how much you can expect to pay for window installation and replacement in Stamford, CT using our customized window cost calculator.

    Estimated Window Cost:
    161 homeowners have requested a free estimate in the last 3 days.

    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.

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    Best Availability

    Renewal by Andersen

    ★★★★★
    4.5
    • Great Industry Reputation
    • Award-winning Company
    • Member of US Green Building Council
    • Manufactures products in-house
    Save $375 Off Each Window
    Get Estimate

    Power Home

    ★★★★★
    4.5
    • Uses eco-friendly materials
    • Well-trained, certified installers
    • Lifetime or lengthy warranty
    Next-Day Appointments Available
    Get Estimate

    Best for Residential Windows

    Window Nation

    ★★★★★
    4.0
    • 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.