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

When the time comes to upgrade your windows, our reviews of the top window installation companies can help you find the right provider for you.

We analyzed all the top-rated window companies in Sunnyvale 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 doing home renovations or have windows that need repairs, windows play a vital role in conserving your home's energy. When it’s the middle of summer, your outdated and leaky windows could be making your home harder to cool and costing you more in power bills.

Installing upgraded, efficient windows on your property can help you save money every month on your electric bills — and you can help the environment, too.

We’ve compiled this list of 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 power 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 Sunnyvale

The EcoWatch Reviews team assessed several window installation companies across Sunnyvale to narrow our list down to the best ones. The providers mentioned in this article scored best in our review categories, such as energy-efficient offerings, local expertise, customer service, availability, 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 is the largest window replacement company in the country, known for its vinyl windows and affordability. This company has 27 years of experience in the window installation industry, and it has become one of the most respected companies in the business. The provider has hundreds 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, this may be the right provider for you.

Energy Efficiency of Window World Windows

There are a wide range of window types that Window World offers, 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 Sunnyvale?

Pricing information is not available on Window World’s website, as 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. Requesting a free quote on its website is the best way to get more accurate information.

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 is a family-owned and -operated window replacement company, which primarily serves the West Coast. This company has 60 years of experience in the window installation industry, and it has become one of the most respected companies in the business. The provider has hundreds of positive reviews from customers on online review websites.

If you’re looking for a company that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience, this may be the right provider for you.

Energy Efficiency of Milgard Windows & Doors Windows

There are a wide range of window types that Milgard Windows & Doors offers, some of which are Energy Star products. 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 Sunnyvale?

Pricing information is not available on Milgard’s website, as the cost of window replacement depends on how many and what type(s) of windows you need. However, it offers different kinds of windows at varying price points. Requesting a free quote on its website is the best way to get more accurate information.

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. This company has 27 years of experience in the window installation industry, and it has become one of the most respected companies in the business. The provider has hundreds 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, this may be the right provider for you.

Energy Efficiency of Renewal by Andersen Windows

There are a wide range of window types that Renewal by Andersen offers, 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 Sunnyvale?

Pricing information is not available on Andersen’s website, as 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. Requesting a free quote on its website is the best way to get more accurate information.

We aim to be unbiased and transparent by mentioning pros and cons for every company. Additionally, any partnerships do not affect our rankings.

More Window Companies in Sunnyvale

Renewal by Andersen of San Francisco

Hayward, CA
4.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.renewalbyandersen.com/window-company/890-san-francisco-ca/retailer
Address: 30806 Santana St, Hayward, CA 94544
Phone: (510) 803-3110

GENERAL B CONTRACTOR

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

Services Offered

  • Service icon Window Replacement/Installation

Website: http://www.generalbcontractor.com/
Address: 262 Hillsdale Ave, San Jose, CA 95136
Phone: (408) 999-1111

Mr Window Replacement

Fremont, CA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

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

Website: http://www.mrwindowreplacement.com/
Address: 4053 Nicolet Ave, Fremont, CA 94536
Phone: (707) 294-8507

Quality Windows & Doors

Pleasanton, CA
5.0
★★★★★
  • 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 Window Replacement/Installation

Website: https://www.qwdwindowsanddoors.com/
Address: 3732 Stanley Blvd Ste B, Pleasanton, CA 94566
Phone: (925) 484-1747

Cal Coast Window & Door

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

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Bay Windows
  • Service icon Glass Doors

Website: https://calcoastwindows.com/
Address: 5673 W Las Positas Blvd Suite 203, Pleasanton, CA 94588
Phone: (925) 398-8184

Golden Heights Remodeling INC

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

Bay Builders and Remodeling Inc.

San Jose, CA
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: http://baybuilders.com/
Address: 800 Charcot Ave #100, San Jose, CA 95131
Phone: (408) 583-6797

American Window Specialist

Campbell, CA
4.9
★★★★★
  • Pros icon Free assessment

Services Offered

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

Website: https://americanwindowspecialists.com/
Address: 1550 Dell Ave i, Campbell, CA 95008
Phone: (408) 484-7676

Sivan Windows and Doors - San Jose Window and Door Replacement Company

San Jose, CA
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

Website: https://sivanwindowsanddoors.com/contact-san-jose/
Address: 1650 Las Plumas Ave A, San Jose, CA 95133
Phone: (888) 582-7956

Alexander Company

Burlingame, CA
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

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

Website: https://alexanderco.com/
Address: 1322 Marsten Rd, Burlingame, CA 94010
Phone: (650) 288-0813

Window Factory

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

Services Offered

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

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

Glasswork By Design

Salinas, CA
4.9
★★★★★

    Services Offered

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

    Website: http://www.glassworkbydesign.net/
    Address: 131 E Alisal St, Salinas, CA 93901
    Phone: (831) 320-4293

    The Glass Guru

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

    Services Offered

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

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

    R & M Quality Windows & Doors

    Newark, CA
    4.8
    ★★★★★
    • Pros icon Timely Service
    • Pros icon Educational Website
    • Pros icon Good Customer Service
    • Pros icon Price Transparency
    • Pros icon Free assessment

    Services Offered

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

    Website: https://www.randmqualitywindowsanddoors.com/
    Address: 5588 Central Ave #A, Newark, CA 94560
    Phone: (510) 796-0100

    Integrity Windows & Doors

    San Jose, CA
    4.8
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Good Customer Service

    Services Offered

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

    Website: http://www.408windows.com/
    Address: 4238 Monterey Hwy B, San Jose, CA 95111
    Phone: (408) 225-2600

    Custom Exteriors, Inc

    Pleasanton, CA
    4.8
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Free assessment
    • Pros icon Educational Website
    • Pros icon Good Customer Service

    Services Offered

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

    Website: https://www.custom-exteriors.com/
    Address: 2142 Rheem Dr ste e, Pleasanton, CA 94588
    Phone: (888) 957-7800

    American Vision Windows

    Santa Clara, CA
    4.7
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Free assessment
    • Pros icon Educational Website

    Services Offered

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

    Website: https://www.americanvisionwindows.com/locations/san-jose/
    Address: 400 Mathew St, Santa Clara, CA 95050
    Phone: (408) 444-8941

    East County Glass & Window, Inc.

    Pittsburg, CA
    4.7
    ★★★★★
    • Pros icon Educational Website

    Services Offered

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

    Website: http://www.ecglass.com/
    Address: 441 E 10th St, Pittsburg, CA 94565
    Phone: (925) 432-1433

    American Glass Co

    Modesto, CA
    4.7
    ★★★★★
    • Pros icon Free assessment
    • Pros icon Price Transparency
    • Pros icon Good Customer Service

    Services Offered

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

    Website: https://www.americanglassinc.net/
    Address: 419 E Coolidge Ave, Modesto, CA 95350
    Phone: (209) 522-7007

    Glass Doctor of The Bay Area

    Hayward, CA
    4.6
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Educational Website
    • Pros icon Price Transparency

    Services Offered

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

    Website: https://glassdoctor.com/hayward
    Address: 773 Berry Ave, Hayward, CA 94544
    Phone: (510) 264-5277
    Sunnyvale Window Cost Calculator

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

    By upgrading to energy-efficient windows, you can enjoy several benefits, including:

    • Protect your valuables: The low-emissivity coatings on many energy-efficient windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.
    • Protect your investment: When your home is on the older side, your windows could also be outdated or leaky. Upgrading your windows is an important part of maintaining your property and its value.
    • Decrease your carbon footprint: You can reduce your indirect greenhouse gas emissions by about 12% when you install Energy Star certified windows. In Sunnyvale, that’s about 117 pounds per year on average.
    • Save money on energy bills: Switching to energy-efficient windows reduces your energy bills by about 12% because you need less energy.

    Estimated Cost of Window Replacement in Sunnyvale

    When considering window installation, each company offers different services and costs. Let’s take a look at some typical costs and services.

    How Much Do New Windows Cost?

    The national average cost to install one window is about $600 but can range anywhere from $200 to $1,200. How much it will cost varies based on several factors, such as the location of your home, material, size, number of windows, type and more.

    It’s important to bear in mind that windows with the best efficiency may cost more initially but can save you hundreds of dollars via returns on your energy bills. Investing in Energy Star certified windows can save Sunnyvale homeowners $562+ a year when replacing single-pane windows.

    We advise getting free quotes from multiple window installers to find the right windows and the company that works best for you.

    What Services do Window Installers Offer?

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

    Full-frame installations involve replacing the total window, including the sill, trim and frame. Full-frame installations are necessary when you want to change the style of your windows or your window has noticeable rot. These installations are more involved and will raise the total cost. A pocket installation entails installing a new window within the old frame. This means instead of taking out the whole window and rebuilding it, the contractor will just slide the replacement window (also called a retrofit or insert window) into the frame.

    If you’re still trying to decide which type of installation you should get, you can consult with your installer and get their advice. The choice mostly depends on the age of your window frames and if there’s any damage.

    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 Sunnyvale

    In our hunt to make your home improvements easier and more eco-friendly in Sunnyvale, EcoWatch landed on the above companies as the top window installation companies in the city. Along with energy efficiency, we assessed window companies all across the state and ranked them using the following methodology:

    Service Area

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

    Work Quality

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

    Customer Reviews

    Customer feedback is another very important review factor. If the majority of customers don’t have good feedback about their experience with a certain installer, it won’t be featured on EcoWatch.

    Cost

    This one is a give-and-take: as with other services, cheap window installers may not provide the highest 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

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

    Years of Experience

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

    Sunnyvale, CA Window Replacement FAQs

    How much does window installation cost?

    The typical cost of replacing a window can range from $450 to $650. There are a variety of factors that influence how much it costs, such as the number of windows, how energy-efficient the windows are, local labor costs, the materials used in designing the windows, styles and sizes of windows and your property’s location.

    What type of window is the best for energy efficiency?

    A window’s energy efficiency depends on a number of factors, including the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient and are certified by the U.S. Department of Energy.

    What do window installers do?

    Window installers will do the entire process — from replacing your old windows with new ones to cleaning up afterward. Additionally, some companies offer window manufacturing, customization and repairs.

    What time of year should I replace my windows?

    Replacement windows can be installed during any season, but warmer weather is typically better. Regardless of when you install them, the contractors will take steps to ensure that too much hot or cold air doesn’t get into your home, so the temperature outside isn’t necessarily a big factor. Most importantly, the weather should be dry.

    How often should you replace your windows?

    Windows have an average lifespan of about 20 to 30 years. If your windows are older than that, then they probably need to be replaced. Apart from that, if your windows have any damage on them, or they have become difficult to operate, they may be in need of replacement.