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

When you need to upgrade your windows, our list of the top window installation companies can help you find the provider for you.

We analyzed all the top-rated window companies in Gilroy 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 renovations or have old windows, windows play a crucial role in conserving your home's electricity. The Department of Energy estimates that heat or cool air lost through traditional or outdated windows could make up nearly 30% of residential energy climate use. In Gilroy, where the electric bills are an average of $35 per month, that’s almost $$126 per year wasted.

Replacement windows improve your home’s insulation, not only making you more comfortable during the summer and winter, but also saving you money and helping the environment.

So if you’re constructing a new home, renovating or changing out old windows in Gilroy, this is the best place to get started.

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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 Gilroy

The EcoWatch Reviews team evaluated dozens of installers across the country to find the top window installation companies for our readers. The installers in this article passed our review standards for energy-efficient offerings as well as customer service, price, 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. This company has been in business since 1995 and currently serves 200 locations nationwide.

It 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

Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.

How much does Window World cost in Gilroy?

Even though pricing is not readily available on Window World’s website, it's known for offering some of the most affordable window installations around. If you’d like to know for sure, you can get 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 is a family-owned and -operated window replacement company, which primarily serves the West Coast. This company has been in business since 1962 and currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties.

It 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

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. Not all of Milgard’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.

How much does Milgard Windows & Doors cost in Gilroy?

Even though pricing is not readily available on Milgard’s website, it offers different kinds of windows at varying price points. If you’d like to know for sure, you can get 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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has been in business since 1995 and currently serves nearly every state except Mississippi and West Virginia.

It 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

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. Not all of Andersen’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.

How much does Renewal by Andersen cost in Gilroy?

Even though pricing is not readily available on Andersen’s website, 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 to know for sure, you can get a quote on the company’s website.

One thing to note is that the following companies are national, which means the quality of the service may vary depending on your local team. We have tried to stay unbiased and transparent by listing pros and cons for each company.

More Window Companies in Gilroy

Renewal by Andersen of San Francisco

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

Services Offered

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

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

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

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

Services Offered

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

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

Services Offered

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

Glasswork By Design

Salinas, CA
4.9
★★★★★

    Services Offered

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

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

    American Window Specialist

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

    Services Offered

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

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

    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

    Bay Builders and Remodeling Inc.

    San Jose, CA
    4.9
    ★★★★★
    • Pros icon Educational Website
    • Pros icon Free assessment
    • 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

    Alexander Company

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

    Services Offered

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

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

    Integrity Windows & Doors

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

    Services Offered

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

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

    R & M Quality Windows & Doors

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

    Services Offered

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

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

    Custom Exteriors, Inc

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

    Services Offered

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

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

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

    American Glass Co

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

    Services Offered

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

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

    Reborn Cabinets Inc.

    Livermore, CA
    4.6
    ★★★★★
    • 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 Glass Showers
    • Service icon Double-Hung
    • Service icon Bay Windows

    Website: https://www.reborncabinets.com/location/livermore/
    Address: 1306 Stealth St a, Livermore, CA 94551
    Phone: (408) 359-4093

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

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

    Cal Comfort Windows & Doors

    Modesto, CA
    4.6
    ★★★★★
    • Pros icon Timely Service
    • Pros icon Price Transparency

    Services Offered

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

    Website: http://www.calcomfortwindows.com/
    Address: 1050 Kansas Ave, Modesto, CA 95351
    Phone: (209) 527-1310

    Lighthouse Windows

    Santa Cruz, CA
    4.5
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Free assessment

    Services Offered

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

    Website: https://www.lighthouse-windows.com/
    Address: 317 Potrero St Ste E, Santa Cruz, CA 95060
    Phone: (831) 426-2601

    North Glass Windows & Doors

    Ben Lomond, CA
    4.5
    ★★★★★
    • Pros icon Free assessment
    • Pros icon Good Customer Service
    • Pros icon Price Transparency

    Services Offered

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

    Website: http://www.northglass.net/
    Address: 105 Main St, Ben Lomond, CA 95005
    Phone: (831) 336-2288
    Gilroy Window Cost Calculator

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

    Energy-efficient windows can benefit you in several ways. Here are a few reasons you may want to consider making the switch:

    • Save money on electricity bills: The Department of Energy estimates that heat gained or lost via windows accounts for about 25-30% of energy use in your home. Switching to energy-efficient windows can help reduce that amount, which helps you save more on your bills.
    • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
    • Reduce your carbon footprint: In Gilroy, you can lower your indirect greenhouse gas emissions by about 117 pounds per year once you install energy-efficient windows.
    • Protect your investment: If you have an older home, your windows are most likely in need of replacement. Updating your windows can make your home more comfortable and also help raise the value of your home if you decide to sell.

    Estimated Cost of Window Replacement in Gilroy

    Windows come in different styles, shapes and purposes, so costs and services will differ greatly based on your project. Below, we describe the average cost and services that you’ll find from window replacement companies.

    How Much Do New Windows Cost?

    On average, Gilroy homeowners can expect their window replacements to range from $250 to $1,200. The average cost sits at about $600. How much it will cost varies depending on several factors, like size, material, type, number of windows, the location of your home and more.

    It’s also worth noting that energy-efficient windows will almost always cost more initially, but Energy Star predicts that switching out the windows on your Gilroy home can mean an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 each year for double-pane windows. The amount of money you’ll save by installing energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.

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

    What Services do Window Installers Offer?

    There are generally two types of window replacement services: full-frame and pocket installations.

    Full-frame installations are usually recommended when you want a new style or your window has a lot of rot or deterioration. With this service, your installers will replace the full window, including the sill, trim and frame. A pocket installation entails replacing a window without replacing the frame. This means instead of taking out the whole window and rebuilding it, the contractor will just put 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 need, you can consult with your installer and get their recommendation. The decision mostly depends on the age of your window frames 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 Gilroy

    The EcoWatch Reviews team is different from other reviewers because we look at these companies through a sustainability lens. Along with energy efficiency, we reviewed each installer and ranked them using the following methodology:

    Service Area

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

    Work Quality

    We’re certain that you’re not looking for a company to do a shoddy job installing windows. We’ve vetted each company included in our guide to make sure its contractors are well-qualified and that the company has gotten lots of positive customer feedback to vouch for its service.

    Customer Reviews

    Customer feedback is another very important review factor. If most customers don’t have positive things to say about their service from a certain company, you won’t see it featured on EcoWatch.

    Cost

    This one is a give-and-take: similar to most 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 offer a range of price and financing options so they’re accessible to most homeowners.

    Warranty

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

    Years of Experience

    Last but not least, we like to see companies that have been in the industry for a while. Window installers that have more experience earn higher rankings by our standards. We like to see at least ten years of experience.

    Gilroy, CA Window Replacement FAQs

    What is the average cost to install new windows?

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

    What are the kinds of windows?

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

    When do I have to use a window installation company?

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

    How often should you replace windows?

    Windows have a typical lifespan of about 20 to 30 years. If your windows are older than that, then they should probably be replaced. Other than that, if your windows have damage anywhere on them, or they have become difficult to operate, they may need to be replaced.