20 Best Window Companies in Guilford, CT (2024 Reviews)

Are you thinking of upgrading your windows? Our guide to the top window installation companies can help you pick the right one for you.

We analyzed all the top-rated window companies in Guilford 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.

The EcoWatch team is all about helping Guilford homeowners find eco-conscious solutions for their homes. Traditional or damaged windows could lead to having higher electricity bills during the winter or summer months.

That’s not great for either your bank account or the environment, but one of the top window installation companies can help you with that.

Because windows have such a large impact on your home, picking the right company for you is a big decision to make. That’s why the EcoWatch team has made this list of the top window installation companies, so you can more easily make an informed decision.

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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 Guilford

The EcoWatch team evaluated many window installation companies across Guilford to narrow our list down to the top ones. We assessed the installers based on their energy-efficient offerings, coverage area, local experience, customer service, price and more.

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 Guilford. This company has been in business since 1995 and currently serves 200 locations nationwide.

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

Window World is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Window World representative when inquiring about services.

How much does Window World cost in Guilford?

Prices are not available on Window World’s website because the cost of window replacement depends 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. If you’d like more accurate pricing information, you can ask for a quote on the company’s website.

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 Guilford. This company has been in business since 1995 and currently serves nearly every state except Mississippi and West Virginia.

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

Renewal by Andersen is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Andersen representative when inquiring about services.

How much does Renewal by Andersen cost in Guilford?

Prices are not available on Andersen’s website because the cost of window replacement depends 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. If you’d like more accurate pricing information, you can ask for a quote on the company’s website.

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 Guilford. This company has been in business since 1999 and currently serves 13 states and Washington D.C.

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

Aeroseal Windows is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Aeroseal representative when inquiring about services.

How much does Aeroseal Windows cost in Guilford?

Prices are not available on Aeroseal’s website because the cost of window replacement depends on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. If you’d like more accurate pricing information, you can ask for a quote on the company’s website.

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 Guilford. This company has been in business since 2006 and currently serves residents within 75 miles of its showrooms, which are in 13 states.

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

Window Nation is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Window Nation representative when inquiring about services.

How much does Window Nation cost in Guilford?

Prices are not available on Window Nation’s website because the cost of window replacement depends 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. If you’d like more accurate pricing information, you can ask for a quote on the company’s website.

We try to stay unbiased and transparent by describing pros and cons for each company we review. Additionally, our rankings are not affected by any partnerships.

More Window Companies in Guilford

Renewal by Andersen - Branford

Branford, CT
4.9
★★★★★
  • 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 Glass Doors
  • Service icon Skylights
  • Service icon Double-Hung
  • Service icon Bay Windows

Website: http://www.renewalbyandersen.com/window-company/865-southern-connecticut.aspx
Address: 38 N Harbor St, Branford, CT 06405
Phone: (203) 274-8950

Power Home Remodeling

Trumbull, CT
4.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service

Services Offered

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

Website: https://powerhrg.com/
Address: 60 Commerce Dr Suite 150, Trumbull, CT 06611
Phone: (203) 659-4843

Window Nation

Wallingford, CT
4.7
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows

Website: https://www.windownation.com/hartford-ct-showroom/
Address: 1070 N Farms Rd Unit 1, Wallingford, CT 06492
Phone: (475) 253-0015

Bert Falsetti's Home Improvement LLC

Shelton, CT
5.0
★★★★★

    Services Offered

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

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

    Window Depot USA of Southern CT

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

    Services Offered

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

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

    Paramount Gallery

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

    Services Offered

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

    Website: http://paramountgallery.us/
    Address: 121 Talcott Rd, West Hartford, CT 06110
    Phone: (860) 231-7884

    ZN Construction

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

    Services Offered

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

    Website: http://znconstructionct.com/
    Address: 5 Albany Turnpike Unit B6, Canton, CT 06019
    Phone: (860) 318-6340

    Big Dawg Home Improvements

    South Windsor, CT
    5.0
    ★★★★★
    • Pros icon Free assessment
    • Pros icon Timely Service
    • Pros icon Price Transparency
    • Pros icon Good Customer Service

    Services Offered

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

    Website: http://bigdawghomeimprovements.com/
    Address: 658 Foster St, South Windsor, CT 06074
    Phone: (860) 477-6673

    Calvary Remodeling

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

    Services Offered

    • Service icon Window Replacement/Installation

    Website: https://www.calvaryremodeling.com/
    Address: 34 Greenmanville Ave, Mystic, CT 06355
    Phone: (203) 666-9326

    United Home Experts

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

    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

    Flawless Glass & Mirror LLC

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

    Services Offered

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

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

    Budget Blinds of Enfield and Hartford

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

    Services Offered

    • Service icon Custom Window Designs
    • Service icon Window Replacement/Installation

    Website: https://www.budgetblinds.com/Enfield/
    Address: 21 S Rd, Somers, CT 06071
    Phone: (860) 265-3900

    Greenwich Windows Replacement

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

    Services Offered

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

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

    Kubala Home Improvement

    Ludlow, MA
    5.0
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Educational Website
    • Pros icon Free assessment

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Glass Doors

    Website: https://kubalawindows.com/
    Address: 34 Hubbard St, Ludlow, MA 01056
    Phone: (413) 216-9175

    Bencar Building Systems LLC

    Wallingford, CT
    4.9
    ★★★★★
    • Pros icon Good Customer Service

    Services Offered

    • Service icon Window Replacement/Installation

    Website: https://www.bencarbuildingsystems.com/
    Address: 210 N Plains Industrial Rd, Wallingford, CT 06492
    Phone: (203) 269-9204

    Advanced Window Systems LLC

    Cromwell, CT
    4.9
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Price Transparency
    • Pros icon Educational Website
    • Pros icon Free assessment

    Services Offered

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

    Website: https://www.advancedwindowsystems.com/
    Address: 14 Alcap Ridge, Cromwell, CT 06416
    Phone: (860) 718-4586

    Nu-Face Home Improvements

    Berlin, CT
    4.9
    ★★★★★
    • Pros icon Educational Website
    • Pros icon Timely Service
    • Pros icon Price Transparency
    • Pros icon Good Customer Service
    • Pros icon Free assessment

    Services Offered

    • Service icon Glass Showers
    • Service icon Energy-Efficient Options
    • Service icon Window Replacement/Installation
    • Service icon Glass Doors
    • Service icon Double-Hung

    Website: https://nufacect.com/
    Address: 855 Berlin Turnpike, Berlin, CT 06037
    Phone: (860) 681-3002

    Smithtown Window Replacement and Doors

    Smithtown, NY
    4.9
    ★★★★★
    • Pros icon Educational Website
    • Pros icon Price Transparency
    • Pros icon Weekend availability
    • Pros icon Good Customer Service
    • Pros icon Free assessment
    • Pros icon Energy-efficient windows and doors
    • Pros icon Family-owned and operated

    Services Offered

    • Service icon Fiberglass Frames
    • Service icon Storm/Impact Windows
    • Service icon Vinyl Frames
    • Service icon Tempered Glass
    • Service icon Triple Pane Glass
    • Service icon Window Replacement/Installation
    • Service icon Bay Windows
    • Service icon Glass Showers
    • Service icon Custom Window Designs
    • Service icon Energy-Efficient Options
    • Service icon Window Repair
    • Service icon Double-Hung
    • Service icon Glass Doors
    • Service icon Wood Frames
    • Service icon Metal Frames

    Website: https://smithtownwindowsdoors.com/
    Address: 43 Landing Ave, Smithtown, NY 11787
    Phone: (631) 646-2386

    Mr. Handyman of Huntington and Smithtown

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

    Services Offered

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

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

    Homestead Window Treatments

    Huntington Station, NY
    4.9
    ★★★★★
    • Pros icon Educational Website
    • Pros icon Online appointment scheduling
    • Pros icon Price Transparency
    • Pros icon Saturday availability
    • Pros icon Good Customer Service
    • Pros icon Free assessment
    • Pros icon Family-owned and operated

    Services Offered

    • Service icon Custom Window Designs
    • Service icon Window Replacement/Installation

    Website: https://homesteadwindowtreatments.com/
    Address: 11 Walt Whitman Rd, Huntington Station, NY 11746
    Phone: (631) 380-4992
    Guilford Window Cost Calculator

    Calculate how much you can expect to pay for window installation and replacement in Guilford, 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 Guilford 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 upgrading your windows could help you:

    • Save on power bills: Upgrading to energy-efficient windows reduces your energy bills by about 12% because you need less energy.
    • Decrease your carbon footprint: Reducing the amount of energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by about 147 pounds.
    • Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help reduce damage from the sun's UV rays to your floors, carpets and furniture.
    • Protect your investment: Upgrading and repairing your windows is an important part of maintaining your property and its value, particularly if you have an older home.

    Estimated Cost of Window Replacement in Guilford

    When researching window installation, each company offers varying services and costs. Let’s look at some average costs and services.

    How Much Do New Windows Cost?

    According to our market research, the national average cost of replacing a single window is about $600. However, window replacement costs can range from $200 to $1,200 per window. Costs will vary considerably based on your location, the quality of your products, the current condition of your home and the number of windows you need. 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.

    With windows, efficiency is one of the most important factors for many homeowners. Efficient windows may cost more upfront, but by increasing the efficiency of your home — particularly during the summer and winter — they can give you decades of energy savings. According to Energy Star, buying certified energy-efficient windows can save Guilford homeowners $420+ a year after replacing single-pane windows.

    Costs will also vary based on the material of your frame. Aluminum frames are the least expensive. They’re sturdy, light and maintenance-free, but offer poor insulation. Vinyl frames are somewhat expensive and offer good insulation. Composite frames made from wood fibers encased in plastic also offer good insulation and are moderately expensive. Wood frames cost the most and are the most in-demand. They’re also aesthetically pleasing and offer decent insulation for your home.

    What Services do Window Installers Offer?

    The first thing to ask yourself when planning a window installation is: Should you get a full-frame installation or a 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 damage. Full-frame installations are more comprehensive and will increase overall costs. Pocket installations (or retrofits) involve replacing a window within the existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any damage or rot, you will most likely need a full-frame installation instead.

    If you’re still debating which type of installation to get, you can consult with your provider and get their advice. The choice mostly is influenced by how old the frames are and if there’s any damage.

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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 Guilford

    EcoWatch reviews are different from other reviews because we assess these companies through a sustainability lens. Along with energy efficiency, we assessed several window installers in Guilford and assigned rankings using the following methodology:

    Service Area

    This one is self-explanatory, but we’ve chosen to highlight window installers that serve Guilford so you can find the best window installation company near you.

    Work Quality

    When selecting new windows, the quality and range of services can often play just as important of a role in overall efficiency and performance as the type of window you choose. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.

    Customer Reviews

    We analyzed trends in recent customer feedback to find the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction may be the factor we place the most value on, as it reflects the quality of services across most other categories, including professionalism, cost, quality of parts, warranty, quality of installation and more.

    Cost

    Cheaper windows certainly don’t 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 scores to companies with reasonable prices and accessible financing rather than “cheaper” services.

    Warranty

    Protecting your investment in new windows is important. That’s why window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

    Years of Experience

    Due to Guilford’s climate, homeowners need to be wary of low efficiency, water damage and rot. We factored in local experience to reflect the ability of Guilford window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.

    Guilford, CT Window Replacement FAQs

    How much should a window install cost?

    The average cost of installing one window can range from $450 to $650. There are several factors that affect how much it costs, including local labor costs, how energy-efficient the windows are, the number of windows, your property’s location, the materials used in designing the windows and styles and sizes of windows.

    What are the kinds of windows?

    There are various types of windows you can get for your house, including casement windows, bay windows, picture windows, awning windows, slider windows, double-hung and single-hung windows and transom windows.

    When should I use a window installation company?

    Unless you’re handy and have the time to replace your own windows, we recommend hiring a professional installer. The process of installing windows is complex and can take anywhere from four to six hours for a single window. Although it’s tempting to try to save some money by doing it yourself, hiring a company is a faster, more efficient and safer alternative.

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

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

    Should I replace my windows all at the same time?

    If you’re upgrading your windows to save on your energy bills, replacing all the windows at once is the only way to gain that benefit. On the other hand, if you have just one or two windows that are broken or drafty, you can replace just those.