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
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Why you can trust EcoWatch
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 When it’s the middle of summer, your outdated and leaky windows could be making your home harder to cool and costing you more in power bills.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.
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 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
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 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 WindowsThere 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
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 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 WindowsThere 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
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 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 WindowsThere 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, CAFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Double-Hung
Bay Windows
Glass Doors
Skylights
Window Replacement/Installation
GENERAL B CONTRACTOR
San Jose, CAEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Mr Window Replacement
Fremont, CAFree assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Vinyl Frames
Bay Windows
Quality Windows & Doors
Pleasanton, CAGood Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
Cal Coast Window & Door
Pleasanton, CAFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Bay Windows
Glass Doors
Golden Heights Remodeling INC
Concord, CAFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Bay Windows
Window Replacement/Installation
Bay Builders and Remodeling Inc.
San Jose, CAFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Bay Windows
American Window Specialist
Campbell, CAFree assessment
Services Offered
Window Repair
Double-Hung
Bay Windows
Glass Doors
Window Replacement/Installation
Vinyl Frames
Sivan Windows and Doors - San Jose Window and Door Replacement Company
San Jose, CAPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Glass Doors
Window Replacement/Installation
Alexander Company
Burlingame, CAGood Customer Service
Price Transparency
Free assessment
Services Offered
Bay Windows
Window Repair
Skylights
Glass Doors
Window Replacement/Installation
Window Factory
Greenbrae, CAGood Customer Service
Free assessment
Educational Website
Services Offered
Metal Frames
Window Replacement/Installation
Fiberglass Frames
Vinyl Frames
Wood Frames
Glass Doors
Bay Windows
Glasswork By Design
Salinas, CAServices Offered
Window Repair
Glass Doors
Glass Showers
Mirrors
Window Replacement/Installation
The Glass Guru
Fairfield, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Glass Showers
Window Repair
Fiberglass Frames
Window Replacement/Installation
Mirrors
Glass Repair
Wood Frames
Triple Pane Glass
Energy-Efficient Options
Screen Repair
Metal Frames
Vinyl Frames
Custom Glass
Skylights
Storm/Impact Windows
Tempered Glass
Glass Doors
R & M Quality Windows & Doors
Newark, CATimely Service
Educational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Bay Windows
Glass Doors
Window Replacement/Installation
Integrity Windows & Doors
San Jose, CAPrice Transparency
Good Customer Service
Services Offered
Metal Frames
Glass Doors
Vinyl Frames
Window Replacement/Installation
Wood Frames
Fiberglass Frames
Bay Windows
Custom Exteriors, Inc
Pleasanton, CAPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Energy-Efficient Options
Glass Doors
Bay Windows
Custom Window Designs
Window Replacement/Installation
American Vision Windows
Santa Clara, CAPrice Transparency
Free assessment
Educational Website
Services Offered
Fiberglass Frames
Window Replacement/Installation
Energy-Efficient Options
Vinyl Frames
Double-Hung
Wood Frames
Glass Doors
East County Glass & Window, Inc.
Pittsburg, CAEducational Website
Services Offered
Window Replacement/Installation
Bay Windows
Mirrors
Glass Showers
Glass Doors
American Glass Co
Modesto, CAFree assessment
Price Transparency
Good Customer Service
Services Offered
Mirrors
Window Replacement/Installation
Glass Doors
Window Repair
Glass Doctor of The Bay Area
Hayward, CAGood Customer Service
Educational Website
Price Transparency
Services Offered
Custom Glass
Glass Showers
Window Replacement/Installation
Mirrors
Window Repair
Glass Repair
Bay Windows
Energy-Efficient Options
Calculate how much you can expect to pay for window installation and replacement in Sunnyvale, 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 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.
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 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.