20 Best Window Companies in Windsor, CA (2025 Reviews)

Looking to improve your property’s insulation? The best window replacement companies can help.

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

Whether you're updating for aesthetics or have old windows, windows play a vital role in conserving your home's energy. Poor windows can cut your home’s energy efficiency by up to 30%, according to the Department of Energy. In Windsor, that’s around $418 a year that you could save on your power bills after making the switch.

Thankfully, saving you money with efficient windows also helps our goals of reducing energy usage for the environment.

Unlike other sites, EcoWatch ranks window companies based on energy efficiency while also balancing cost, customer satisfaction and service area.

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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 Windsor

The EcoWatch team researched dozens of installers across the country to find the top window installation companies for our readers. The providers mentioned in this article scored best in our categories: energy-efficient offerings, price, customer service, availability 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 Windsor. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window installation industry for around 27 years.

Window World may be the company for you if you want one 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 caters to eco-conscious consumers by providing 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 Windsor?

Window World doesn’t have any prices displayed on its website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate information, you can receive a quote on the company’s website.

Milgard Windows & Doors logo
Excellent Reputation

Milgard Windows & Doors

★★★★★
BBB Rating: A
Locations: West Coast
Founded: 1962
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Wide network of installers
  • Pros icon Lifetime warranty available
Cons:
  • Pros icon Entails hiring third-party contractors
  • Pros icon Limited additional services

Milgard Windows & Doors provides the best local installation in Windsor. It's a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has been in the window installation industry for around 60 years.

Milgard may be the company for you if you want one that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience.

Energy Efficiency of Milgard Windows & Doors Windows

Milgard Windows & Doors caters to eco-conscious consumers by providing energy-efficient window offerings. The company manufactures its own products, which gives it the freedom to make custom windows based on the climate. The company designs its own vinyl compounds and profiles to ensure a heat-stable product that performs as advertised.

How much does Milgard Windows & Doors cost in Windsor?

Milgard doesn’t have any prices displayed on its website, but it offers different kinds of windows at varying price points. If you’d like more accurate information, you can receive 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 Windsor. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has been in the window installation industry for around 27 years.

Andersen may be the company for you if you want one 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 caters to eco-conscious consumers by providing 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 Windsor?

Andersen doesn’t have any prices displayed 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. If you’d like more accurate information, you can receive a quote on the company’s website.

One thing to note is that the following companies are national, meaning the quality of customer service may depend on your local team. We have tried to stay unbiased and transparent by describing both pros and cons for every provider.

More Window Companies in Windsor

Santa Rosa Window Tint

Santa Rosa, CA
5.0
★★★★★
  • 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: http://www.santarosawindowtint.com/
Address: 3721 Santa Rosa Ave b4, Santa Rosa, CA 95407
Phone: (707) 879-8468

Golden Heights Remodeling INC

Concord, CA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.goldenheightsremodeling.com/
Address: 1110 Burnett Ave # J, Concord, CA 94520
Phone: (800) 521-0950

Northwest Exteriors

Santa Rosa, CA
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service

Services Offered

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

Website: http://www.northwestexteriors.com/
Address: 3450 Airway Dr STE G, Santa Rosa, CA 95403
Phone: (707) 527-7770

Window Factory

Greenbrae, CA
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Wood Frames
  • Service icon Bay Windows
  • Service icon Fiberglass Frames
  • Service icon Vinyl Frames
  • Service icon Glass Doors
  • Service icon Metal Frames

Website: http://www.bayareawindowfactory.com/
Address: 2100 Redwood Hwy, Greenbrae, CA 94904
Phone: (415) 924-3300

The Glass Guru

Fairfield, CA
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Screen Repair
  • Service icon Vinyl Frames
  • Service icon Tempered Glass
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Glass Showers
  • Service icon Metal Frames
  • Service icon Mirrors
  • Service icon Storm/Impact Windows
  • Service icon Glass Repair
  • Service icon Wood Frames
  • Service icon Fiberglass Frames
  • Service icon Custom Glass
  • Service icon Triple Pane Glass
  • Service icon Skylights
  • Service icon Window Repair
  • Service icon Energy-Efficient Options

Website: https://www.theglassguru.com/fairfield-vacaville-ca/
Address: 1601 Enterprise Dr STE 14, Fairfield, CA 94533
Phone: (707) 348-9539

B & L Glass

Santa Rosa, CA
4.8
★★★★★
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Mirrors
  • Service icon Glass Repair
  • Service icon Custom Glass
  • Service icon Window Replacement/Installation
  • Service icon Glass Showers
  • Service icon Glass Doors
  • Service icon Skylights

Website: https://blglass.com/
Address: 3175 Cleveland Ave, Santa Rosa, CA 95403
Phone: (707) 546-4143

American Window Systems, Inc.

Napa, CA
4.7
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Skylights
  • Service icon Window Replacement/Installation

Website: https://www.amwinsys.com/
Address: 1729 Action Ave suite b, Napa, CA 94559
Phone: (707) 244-7260

Diablo Custom Screen & Glass

Concord, CA
4.6
★★★★★

    Services Offered

    • Service icon Custom Glass
    • Service icon Glass Showers
    • Service icon Bay Windows
    • Service icon Window Replacement/Installation

    Website: http://www.diabloscreen.com/
    Address: 1065 Shary Cir, Concord, CA 94518
    Phone: (925) 689-1100

    Best Exteriors

    Oakland, CA
    4.6
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Free assessment
    • Pros icon Timely Service
    • Pros icon Educational Website
    • Pros icon Good Customer Service

    Services Offered

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

    Website: https://bestexteriors.com/
    Address: 1999 Harrison St #10219, Oakland, CA 94612
    Phone: (510) 327-0277

    Lafayette Glass Company

    Lafayette, CA
    4.6
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Free assessment
    • Pros icon Timely Service

    Services Offered

    • Service icon Custom Glass
    • Service icon Glass Doors
    • Service icon Glass Showers
    • Service icon Mirrors
    • Service icon Energy-Efficient Options
    • Service icon Window Replacement/Installation
    • Service icon Window Repair

    Website: http://www.lafayetteglasscompany.com/
    Address: 3375 Mount Diablo Blvd, Lafayette, CA 94549
    Phone: (925) 284-9510

    Ace Glass Company

    San Francisco, CA
    4.5
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Free assessment

    Services Offered

    • Service icon Storm/Impact Windows
    • Service icon Tempered Glass
    • Service icon Mirrors
    • Service icon Window Repair
    • Service icon Glass Repair
    • Service icon Bay Windows
    • Service icon Glass Doors
    • Service icon Glass Showers
    • Service icon Window Replacement/Installation

    Website: http://sfaceglass.com/
    Address: 381 11th St, San Francisco, CA 94103
    Phone: (415) 395-0806

    Novato Glass Inc

    Novato, CA
    4.4
    ★★★★★
    • Pros icon Free assessment
    • Pros icon Good Customer Service
    • Pros icon Price Transparency

    Services Offered

    • Service icon Skylights
    • Service icon Window Replacement/Installation
    • Service icon Glass Doors
    • Service icon Glass Showers
    • Service icon Bay Windows
    • Service icon Custom Glass
    • Service icon Energy-Efficient Options
    • Service icon Mirrors

    Website: http://novatoglassinc.com/
    Address: 1020 Reichert Ave, Novato, CA 94945
    Phone: (415) 897-5117

    Jack Smith Glass & Sash Inc.

    Santa Rosa, CA
    4.0
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Educational Website
    • Pros icon Free assessment
    • Pros icon Price Transparency

    Services Offered

    • Service icon Glass Doors
    • Service icon Glass Showers
    • Service icon Window Repair
    • Service icon Custom Window Designs
    • Service icon Window Replacement/Installation
    • Service icon Wood Frames
    • Service icon Skylights
    • Service icon Mirrors

    Website: http://www.jacksmithglass.com/
    Address: 1050 N Dutton Ave, Santa Rosa, CA 95401
    Phone: (707) 544-0640

    Diablo Glass Inc.

    Concord, CA
    3.8
    ★★★★★

      Services Offered

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

      Website: http://www.diabloglassinc.com/
      Address: 1940 Concord Ave, Concord, CA 94520
      Phone: (925) 682-8271

      Sunset Glass Inc

      San Francisco, CA
      3.7
      ★★★★★
      • Pros icon Educational Website
      • Pros icon Free assessment

      Services Offered

      • Service icon Wood Frames
      • Service icon Mirrors
      • Service icon Vinyl Frames
      • Service icon Window Replacement/Installation
      • Service icon Fiberglass Frames
      • Service icon Tempered Glass
      • Service icon Glass Doors
      • Service icon Glass Showers
      • Service icon Metal Frames

      Website: http://www.sunsetglassinc.com/
      Address: 4301 Irving St, San Francisco, CA 94122
      Phone: (415) 664-1626

      GreenRun Construction - General Contractors

      Santa Rosa, CA
      3.5
      ★★★★★
      • Pros icon Price Transparency
      • Pros icon Educational Website
      • Pros icon Good Customer Service
      • Pros icon Free assessment

      Services Offered

      • Service icon Vinyl Frames
      • Service icon Bay Windows
      • Service icon Window Replacement/Installation
      • Service icon Glass Showers

      Website: http://www.greenrunusa.com/
      Address: 2175 Bluebell Dr Suite E, Santa Rosa, CA 95403
      Phone: (707) 812-7006

      Dan's Glass Inc

      Concord, CA
      3.5
      ★★★★★
      • Pros icon Price Transparency
      • Pros icon Educational Website
      • Pros icon Timely Service
      • Pros icon Good Customer Service

      Services Offered

      • Service icon Mirrors
      • Service icon Glass Showers
      • Service icon Glass Repair
      • Service icon Window Replacement/Installation
      • Service icon Glass Doors
      • Service icon Bay Windows
      • Service icon Window Repair

      Website: https://www.dansglassinc.com/
      Address: 1600 Concord Ave, Concord, CA 94520
      Phone: (925) 827-4173

      Vallejo Glass Inc.

      Vallejo, CA
      3.4
      ★★★★★

        Services Offered

        • Service icon Mirrors
        • Service icon Energy-Efficient Options
        • Service icon Metal Frames
        • Service icon Vinyl Frames
        • Service icon Glass Showers
        • Service icon Glass Repair
        • Service icon Bay Windows
        • Service icon Custom Glass
        • Service icon Glass Doors
        • Service icon Window Replacement/Installation

        Website: https://vallejoglass.com/
        Address: 205 Couch St, Vallejo, CA 94590
        Phone: (707) 644-4447

        Pella Windows & Doors of Northern California

        Rohnert Park, CA
        3.3
        ★★★★★
        • Pros icon Educational Website
        • Pros icon Price Transparency
        • Pros icon Good Customer Service
        • Pros icon Free assessment

        Services Offered

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

        Website: http://www.pellanorcal.com/
        Address: 5430 Commerce Blvd #1b, Rohnert Park, CA 94928
        Phone: (707) 394-5886

        Rojas Construction and Remodeling, Inc.

        Walnut Creek, CA
        3.3
        ★★★★★
        • Pros icon Price Transparency
        • Pros icon Good Customer Service
        • Pros icon Timely Service
        • Pros icon Free assessment

        Services Offered

        • Service icon Window Replacement/Installation

        Website: http://www.rojasremodel.com/
        Address: 2072 Essenay Ave, Walnut Creek, CA 94597
        Phone: (925) 584-6911
        Windsor Window Cost Calculator

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

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

        • Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
        • Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes usually have windows that are outdated, leaky or potentially even damaged in some way. Updating your windows could help increase the value of your property if you decide to sell.
        • Save money on electricity bills: According to the Department of Energy, heat gained or lost through windows makes up around 25-30% of household energy use. Replacing your windows with energy-efficient models can help lower how much energy is used in your home, therefore saving you about 12% more on your bills.
        • Reduce your carbon footprint: By using less energy after upgrading to energy-efficient windows, you’ll also be reducing your indirect greenhouse gas emissions by about 12%, according to Energy Star.

        Estimated Cost of Window Replacement in Windsor

        Let’s go over the cost of updating your windows and the kinds of services you may need for your home.

        How Much Do New Windows Cost?

        According to our market research, the average cost to replace a single window is around $600. However, window replacement costs can range from $200 to $1,200 per window. But costs will vary considerably depending on your location, the number of windows you need, the quality of your products and the current condition of your home. Many window companies also offer door installations and other add-ons like shutters, baths, coating and more. These extra services will increase overall project costs.

        It’s important to note that windows with higher efficiency may cost more initially but can save you hundreds of dollars by decreasing your energy bills. Investing in Energy Star certified windows can save Windsor homeowners $418+ a year when replacing single-pane windows.

        We advise getting free quotes from multiple window installers to find the one that works best for you.

        What Services do Window Installers Offer?

        The first thing to ask yourself when planning to replace your windows is: Should you get a full-frame installation or a pocket installation?

        Full-frame installations involve replacing the complete window, including the sill, frame and trim. Full-frame installations are necessary when you want a new style or your window has significant rot or deterioration. Because these installations are more involved, they will increase the overall cost. Pocket installations (or retrofits) involve installing a new window within the existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any rot or deterioration, you will most likely need a full-frame installation instead.

        If you’re still debating which type of installation you need, you can ask your installer and get their recommendation. The choice mostly depends on the age of your window frames and if there’s any damage present.

        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 Windsor

        In our search to find the most reliable, eco-friendly window installers in Windsor, the EcoWatch team landed on the above companies as the top window installation companies in the city. Along with energy efficiency, we evaluated window companies all across the state and ranked them using the following methodology:

        Service Area

        Because this is a guide for Windsor, we only included companies that serve the city. There are other reputable providers that didn’t make the list because of the low odds that they would serve the average homeowner in Windsor.

        Work Quality

        When installing new windows, the quality and variety of services often plays just as important of a role in overall efficiency and performance as the brand of window you get. We do give window installers higher marks if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

        Customer Reviews

        We analyzed patterns in recent online reviews to determine the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction might be the most important factor, as it indicates the quality of services across most other categories, including warranty, cost, quality of parts, quality of installation, professionalism and more.

        Cost

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

        Warranty

        As discussed, windows are a serious investment, so you’ll want to be certain that investment is protected. Window installation companies that provide lengthy warranties for products, parts and labor rank higher with EcoWatch.

        Years of Experience

        Lastly, we like to see companies that have been in the industry for a while. Window installation companies that have more years of experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.

        Windsor, CA Window Replacement FAQs

        What is the average cost to install new windows?

        The typical cost of installing a window ranges from $450 to $650. There are a variety of factors that affect how much it costs, which include the number of windows, how energy-efficient the windows are, your property’s location, the materials used in designing the windows, styles and sizes of windows and local labor costs.

        What are the most common types of replacement windows?

        The most common types of windows for homes include: double-hung and single-hung windows, casement windows, bay windows, awning windows, transom windows, slider windows and picture windows.

        Do I really need to use a window installation company?

        You should use a window installation professional whenever you want to upgrade your windows. Installing windows is a complicated process that can be difficult to do on your own, so it’s best left to the professionals.

        When is the best time of year to replace windows?

        Even though you can install windows any time of year, warmer weather is typically better for installing replacement windows. Additionally, the weather should be dry, because rain can make the installation harder.

        How long does window installation usually take?

        Each window takes around 30 minutes to install based on the kind of window. However, the window installation can be a two-day job — or more — if you have a lot of windows that have to be installed.