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
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Why you can trust EcoWatch
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 The Department of Energy estimates that heat or cool air lost through traditional or outdated windows could make up nearly 30% of residential energy climate use.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.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- 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
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
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 WindowsIts 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
EnergyStar Partner
Wide network of installers
Lifetime warranty available
Entails hiring third-party contractors
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 WindowsThe 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
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
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 WindowsA 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, CAFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Bay Windows
Glass Doors
Double-Hung
Window Replacement/Installation
Skylights
GENERAL B CONTRACTOR
San Jose, CAFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Mr Window Replacement
Fremont, CAFree assessment
Good Customer Service
Services Offered
Bay Windows
Vinyl Frames
Window Replacement/Installation
Quality Windows & Doors
Pleasanton, CAPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Cal Coast Window & Door
Pleasanton, CAFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Bay Windows
Glass Doors
Glasswork By Design
Salinas, CAServices Offered
Glass Doors
Mirrors
Glass Showers
Window Replacement/Installation
Window Repair
American Window Specialist
Campbell, CAFree assessment
Services Offered
Window Replacement/Installation
Window Repair
Bay Windows
Vinyl Frames
Double-Hung
Glass Doors
Sivan Windows and Doors - San Jose Window and Door Replacement Company
San Jose, CAGood Customer Service
Educational Website
Price Transparency
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Bay Builders and Remodeling Inc.
San Jose, CAEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Bay Windows
Alexander Company
Burlingame, CAGood Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Skylights
Glass Doors
Window Repair
Bay Windows
Integrity Windows & Doors
San Jose, CAPrice Transparency
Good Customer Service
Services Offered
Wood Frames
Bay Windows
Glass Doors
Fiberglass Frames
Window Replacement/Installation
Metal Frames
Vinyl Frames
R & M Quality Windows & Doors
Newark, CAGood Customer Service
Free assessment
Price Transparency
Timely Service
Educational Website
Services Offered
Window Replacement/Installation
Glass Doors
Bay Windows
Custom Exteriors, Inc
Pleasanton, CAPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
Glass Doors
Bay Windows
Energy-Efficient Options
Custom Window Designs
American Vision Windows
Santa Clara, CAPrice Transparency
Free assessment
Educational Website
Services Offered
Wood Frames
Glass Doors
Window Replacement/Installation
Double-Hung
Fiberglass Frames
Energy-Efficient Options
Vinyl Frames
American Glass Co
Modesto, CAPrice Transparency
Free assessment
Good Customer Service
Services Offered
Window Repair
Glass Doors
Mirrors
Window Replacement/Installation
Reborn Cabinets Inc.
Livermore, CAGood Customer Service
Free assessment
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Glass Showers
Double-Hung
Bay Windows
Glass Doctor of The Bay Area
Hayward, CAGood Customer Service
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Bay Windows
Glass Repair
Mirrors
Custom Glass
Window Repair
Glass Showers
Energy-Efficient Options
Cal Comfort Windows & Doors
Modesto, CATimely Service
Price Transparency
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Glass Doors
Lighthouse Windows
Santa Cruz, CAGood Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Bay Windows
Glass Doors
North Glass Windows & Doors
Ben Lomond, CAFree assessment
Good Customer Service
Price Transparency
Services Offered
Mirrors
Glass Showers
Window Replacement/Installation
Custom Glass
Window Repair
Skylights
Glass Doors
Glass Repair
Calculate how much you can expect to pay for window installation and replacement in Gilroy, CA using our customized window cost calculator.
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.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- 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.