20 Best Window Companies in Darien, CT (2025 Reviews)

Thinking about upgrading your windows? We’ve got you covered in this guide to the top window installation companies.

We analyzed all the top-rated window companies in Darien 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 review of the top window installation companies in Darien may not seem like the most compelling article on the EcoWatch site, but trust us, windows impact your life more than you might think. When it’s the middle of winter, your outdated and drafty windows could be making your home more difficult to heat and costing you more in power bills.

Fortunately, saving you energy with upgraded windows also aligns with our goals of conserving energy and the resources it takes to make it.

We’ve compiled this list of the top installation companies to help you in your search, so you can not only benefit from brand-new windows, but also save money on your electricity bills.

Advertisement

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 Darien

The EcoWatch team researched dozens of window companies in Darien to find the best ones for our readers. The companies mentioned in this article passed our review standards for energy-efficient offerings as well as price, customer service, local expertise 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 is the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has over 27 years of experience in the windows industry, and it currently serves 200 locations nationwide. The company has a lot of positive reviews from customers on online 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, Window World may be the right company for you.

Energy Efficiency of Window World Windows

Window World’s commitment to sustainability can be seen in its energy-efficient window offerings. 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 Darien?

Pricing information is not available on Window World’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. For more detailed information on the cost, 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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has over 27 years of experience in the windows industry, and it currently serves nearly every state except Mississippi and West Virginia. The company has a lot of positive reviews from customers on online 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, Andersen may be the right company for you.

Energy Efficiency of Renewal by Andersen Windows

Renewal by Andersen’s commitment to sustainability can be seen in its energy-efficient window offerings. 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 Darien?

Pricing information is not available on Andersen’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, 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 the cost, 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 is 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 over 23 years of experience in the windows industry, and it currently serves 13 states and Washington D.C. The company has a lot of positive reviews from customers on online review websites.

If you’re looking for a company that installs windows and doors at businesses across the Eastern U.S, Aeroseal may be the right company for you.

Energy Efficiency of Aeroseal Windows Windows

Aeroseal Windows’s commitment to sustainability can be seen in its energy-efficient window offerings. 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 Darien?

Pricing information is not available on Aeroseal’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. For more detailed information on the cost, 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 is a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has over 16 years of experience in the windows industry, and it currently serves residents within 75 miles of its showrooms, which are in 13 states. The company has a lot of positive reviews from customers on online 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, Window Nation may be the right company for you.

Energy Efficiency of Window Nation Windows

Window Nation’s commitment to sustainability can be seen in its energy-efficient window offerings. 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 Darien?

Pricing information is not available on Window Nation’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, 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 the cost, you can request a quote from the company.

We’ve recommended providers with good reputations, but keep in mind these are national companies, so your service may differ depending on your local crew. We have tried to stay unbiased and transparent by describing pros and cons for every company we reviewed.

More Window Companies in Darien

Renewal by Andersen of Long Island

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

Services Offered

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

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 Price Transparency
  • Pros icon Free assessment
  • Pros icon Timely Service

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

United Home Experts

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

Services Offered

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

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

Greenwich Windows Replacement

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

Services Offered

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

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

Window Depot USA of Southern CT

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

Services Offered

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

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

Doors & Windows

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

Services Offered

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

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

M & R Windows

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

Services Offered

  • Service icon Window Replacement/Installation

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

Bert Falsetti's Home Improvement LLC

Shelton, CT
5.0
★★★★★

    Services Offered

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

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

    Edge Remodeling, Inc.

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

    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 Free assessment
    • Pros icon Price Transparency

    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

    Flawless Glass & Mirror LLC

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

    Services Offered

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

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

    Aspen Home Remodeling, LLC.

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

    Services Offered

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

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

    Cityproof Soundproof Windows

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

    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

    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 Free in-home consultation
    • Pros icon Good Customer Service
    • Pros icon Free assessment
    • Pros icon Price Transparency
    • Pros icon Saturday and Sunday availability
    • Pros icon Educational Website

    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 Free assessment
    • Pros icon Price Transparency
    • Pros icon Educational Website
    • Pros icon Good Customer Service

    Services Offered

    • Service icon Vinyl Frames
    • Service icon Window Replacement/Installation
    • 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 Family-owned and operated
    • Pros icon Full-service installation
    • Pros icon Minority-owned and operated
    • Pros icon Price Transparency
    • Pros icon Free assessment
    • Pros icon Good Customer Service
    • 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 Free assessment
    • Pros icon Price Transparency
    • Pros icon Educational Website
    • Pros icon Good Customer Service

    Services Offered

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

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

    Ben Window & Glass

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

    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 Free assessment
    • Pros icon Good Customer Service

    Services Offered

    • Service icon Window Replacement/Installation

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

    Mr. Handyman of Huntington and Smithtown

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

    Services Offered

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

    Website: https://www.mrhandyman.com/huntington-smithtown/
    Address: 514 Larkfield Rd Suite 8, East Northport, NY 11731
    Phone: (631) 257-3213
    Darien Window Cost Calculator

    Calculate how much you can expect to pay for window installation and replacement in Darien, 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 Darien Saves You Money

    There are quite a few perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the switch are the following:

    • 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.
    • Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
    • Reduce your carbon footprint: Because 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 power bills: According to the Department of Energy, heat gained or lost through windows makes up about 25-30% of residential energy use. Installing energy-efficient models can help reduce how much energy is used in your home, therefore saving you about 12% more on your bills.

    Estimated Cost of Window Replacement in Darien

    Windows come in different purposes, styles and shapes, so costs and services will vary remarkably depending on several factors. Below, we describe the average cost and services that you can get from window installation companies.

    How Much Do New Windows Cost?

    Even though the average cost to install one window is around $600, it can range anywhere from $200 to $1,200. These amounts vary depending on specific characteristics of your installation, such as number of windows, the location of your home, type, size, material and more.

    With windows, efficiency is one of the most important factors for many homeowners. High efficiency windows may cost more upfront, but by increasing the efficiency of your home — particularly during the summer and winter — they can provide many years of energy savings. According to Energy Star, buying certified energy-efficient windows can save Darien homeowners $441+ a year after replacing single-pane windows.

    We advise requesting free quotes from multiple window installation companies to find the one that works best for your budget.

    What Services do Window Installers Offer?

    The first step of a window replacement is to decide whether you want a full-frame or pocket installation.

    Full-frame installations require replacing the whole window — the sill, frame, trim and all. These are typically done when you want a different style for your windows or when it has a great amount of deterioration. Full-frame installations involve more time and labor and will increase overall costs. Pocket installations (also known as retrofits) are when you replace a window while leaving the old 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 hiring a reputable window installation company, your company will be able to advise you on the best type for your project. In Darien, the choice will mostly be based on the efficiency of your home and how old your existing frames are.

    Advertisement

    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 Darien

    In our search to find the most reliable, eco-friendly window installers in Darien, EcoWatch landed on the above companies as the top window installation companies in the city. We’ve reviewed the best window replacement companies in Darien mostly based on their energy efficient offerings, as it’s the most sustainable option and the best one for homeowners. Energy Star certified windows have been shown to cut your electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

    Service Area

    Since this is a guide for Darien, we gave more points to companies that provide services to the city. There are certainly other reputable providers that didn’t make the cut because they wouldn’t be able to serve homeowners in Darien.

    Work Quality

    When choosing new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand of window 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

    We analyzed trends in recent online reviews to find the companies with the most consistent customer satisfaction. Customer satisfaction may be the factor we place the most value on, as it indicates the quality of services across nearly every category, including professionalism, quality of parts, quality of installation, warranty, cost and more.

    Cost

    This one is a give-and-take: as with other services, cheap window installation companies may not provide the most quality service. On the other hand, we want to make sure we’re highlighting companies that provide a wide range of price and financing options so they’re accessible to most homeowners.

    Warranty

    As discussed previously, windows are a sizable investment, so you’ll want to make sure that investment is well protected. Window installation companies with lengthy warranties for products, parts and labor rank higher with EcoWatch.

    Years of Experience

    Lastly, we like to see companies that have a proven track record in the industry. 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.

    Darien, CT Window Replacement FAQs

    How much should a window install cost?

    The national average cost of installing a window is about $600 but can range between $200 and $1,200, based on a few different factors. The price is usually influenced by the type and material of the window, the size of the window and the location of your property. Also, bear in mind that energy-efficient windows may cost more initially but can save you a decent amount of money a year in energy bills.

    What kind of window is the most energy-efficient?

    A window’s energy efficiency is affected by a number of factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are typically the most energy-efficient and are certified by the U.S. Department of Energy.

    When do I have to use a window installation company?

    You should use a window installation professional whenever you want to upgrade your windows. Installing windows is a complex process that can be difficult and time-consuming, so it’s best handled by the professionals.

    How do you know it’s time to replace your windows?

    Windows generally last about 20 to 30 years, but anytime you notice damage on your windows, it’s a good idea to have them looked at by an expert to see if they need any repairs or replacements.

    How long does it generally take to install windows?

    Since the average installation time of a window is 30 minutes, about 16 windows can be installed during an 8-hour work day.