20 Best Window Companies in Foster City, CA (2025 Reviews)
Thinking of improving your property’s insulation? The top window replacement companies can help.
We analyzed all the top-rated window companies in Foster City 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
Although green energy sources like wind and solar are important when it comes to reducing your carbon footprint, improving your house’s energy efficiency can also have a large impact on home energy conservation. During the summer months, the last thing you want is your cool air to leak out of your drafty windows.
That’s also bad news for the environment, as the additional energy required by old windows increases your carbon footprint.
Unlike other review sites, EcoWatch ranks window replacement companies based on energy efficiency while also considering cost, customer satisfaction and service area.
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 Foster City
The EcoWatch team assessed many window installation companies in Foster City to find the top ones for our readers. We assessed the companies on energy-efficient offerings, coverage area, price, customer service, local experience 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 offers windows expertise in Foster City. Window World has over 27 years of industry experience, and it currently provides services to 200 locations nationwide. Its reputation is backed by a considerable amount of positive reviews on customer review websites.
You may want to consider choosing Window World 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.
Energy Efficiency of Window World WindowsThere are a wide range of window types available from Window World, 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 Foster City?Window World does not list prices on its website, but it's known for offering some of the most affordable window installations around. For more accurate information on pricing, you can ask for a quote from the company.

Milgard Windows & Doors
EnergyStar Partner
Wide network of installers
Lifetime warranty available
Entails hiring third-party contractors
Limited additional services
Milgard Windows & Doors offers the best local installation in Foster City. Milgard has over 60 years of industry experience, and it currently provides services to Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties. Its reputation is backed by a considerable amount of positive reviews on customer review websites.
You may want to consider choosing Milgard 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.
Energy Efficiency of Milgard Windows & Doors WindowsThere are a wide range of window types available from Milgard Windows & Doors, 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 Foster City?Milgard does not list prices on its website, but it offers different kinds of windows at varying price points. For more accurate information on pricing, you can ask for a quote from the company.

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 offers the best availability in Foster City. Andersen has over 27 years of industry experience, and it currently provides services to nearly every state except Mississippi and West Virginia. Its reputation is backed by a considerable amount of positive reviews on customer review websites.
You may want to consider choosing Andersen 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.
Energy Efficiency of Renewal by Andersen WindowsThere are a wide range of window types available from Renewal by Andersen, 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 Foster City?Andersen does not list prices 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. For more accurate information on pricing, you can ask for a quote from the company.
Please note that the following companies are national, which means the quality of the service may vary depending on your local crew. We have tried to be unbiased and transparent by including pros and cons for each provider.
More Window Companies in Foster City
Renewal by Andersen of San Francisco
Hayward, CAPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Bay Windows
Skylights
Window Replacement/Installation
Double-Hung
Glass Doors
Mr Window Replacement
Fremont, CAGood Customer Service
Free assessment
Services Offered
Vinyl Frames
Window Replacement/Installation
Bay Windows
Cal Coast Window & Door
Pleasanton, CAFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Energy-Efficient Options
Bay Windows
Glass Doors
Window Replacement/Installation
Quality Windows & Doors
Pleasanton, CAFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Glass Doors
Window Replacement/Installation
GENERAL B CONTRACTOR
San Jose, CAFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
Golden Heights Remodeling INC
Concord, CAFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Bay Windows
Alexander Company
Burlingame, CAGood Customer Service
Price Transparency
Free assessment
Services Offered
Bay Windows
Window Replacement/Installation
Window Repair
Skylights
Glass Doors
Bay Builders and Remodeling Inc.
San Jose, CAEducational Website
Free assessment
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Bay Windows
Sivan Windows and Doors - San Jose Window and Door Replacement Company
San Jose, CAGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
American Window Specialist
Campbell, CAFree assessment
Services Offered
Vinyl Frames
Window Repair
Bay Windows
Window Replacement/Installation
Double-Hung
Glass Doors
Window Factory
Greenbrae, CAEducational Website
Good Customer Service
Free assessment
Services Offered
Bay Windows
Metal Frames
Fiberglass Frames
Vinyl Frames
Glass Doors
Window Replacement/Installation
Wood Frames
The Glass Guru
Fairfield, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Screen Repair
Mirrors
Wood Frames
Glass Repair
Vinyl Frames
Metal Frames
Glass Showers
Custom Glass
Skylights
Fiberglass Frames
Window Replacement/Installation
Window Repair
Storm/Impact Windows
Triple Pane Glass
Tempered Glass
Energy-Efficient Options
Glass Doors
R & M Quality Windows & Doors
Newark, CAGood Customer Service
Educational Website
Timely Service
Price Transparency
Free assessment
Services Offered
Bay Windows
Glass Doors
Window Replacement/Installation
Custom Exteriors, Inc
Pleasanton, CAPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Bay Windows
Energy-Efficient Options
Custom Window Designs
Integrity Windows & Doors
San Jose, CAPrice Transparency
Good Customer Service
Services Offered
Vinyl Frames
Metal Frames
Fiberglass Frames
Window Replacement/Installation
Wood Frames
Glass Doors
Bay Windows
American Vision Windows
Santa Clara, CAPrice Transparency
Educational Website
Free assessment
Services Offered
Fiberglass Frames
Vinyl Frames
Double-Hung
Glass Doors
Window Replacement/Installation
Energy-Efficient Options
Wood Frames
East County Glass & Window, Inc.
Pittsburg, CAEducational Website
Services Offered
Window Replacement/Installation
Mirrors
Glass Doors
Glass Showers
Bay Windows
American Window Systems, Inc.
Napa, CAPrice Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Skylights
Window Replacement/Installation
Glass Doctor of The Bay Area
Hayward, CAPrice Transparency
Educational Website
Good Customer Service
Services Offered
Window Repair
Custom Glass
Glass Showers
Bay Windows
Glass Repair
Window Replacement/Installation
Energy-Efficient Options
Mirrors
Best Exteriors
Oakland, CAFree assessment
Price Transparency
Timely Service
Good Customer Service
Educational Website
Services Offered
Energy-Efficient Options
Fiberglass Frames
Window Replacement/Installation
Double-Hung
Glass Doors
Wood Frames
Bay Windows
Vinyl Frames
Calculate how much you can expect to pay for window installation and replacement in Foster City, 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 Foster City Saves You Money
Energy-efficient windows can provide benefits in more than one way. Here are a few reasons you may want to take the plunge and make the switch:
- Save on power bills: Upgrading to energy-efficient windows reduces your energy bills by about 12% because you need less energy.
- Protect your valuables from fading: When you switch to energy-efficient windows with low-emissivity coatings, your floors, carpets and furniture will fade less because of their ability to filter out harmful UV rays.
- Decrease your carbon footprint: You can reduce your carbon footprint by about 12% when you install Energy Star certified windows. In Foster City, that’s about 117 pounds per year on average.
- Protect your investment: When your home is on the older side, your windows could also be outdated or leaky. Keeping your windows up to date is an important part of maintaining your property and its real estate value.
Estimated Cost of Window Replacement in Foster City
Windows come in varying shapes and sizes, so costs and services will differ greatly. Here are the typical costs and the primary services that you’ll find from window installation companies.
How Much Do New Windows Cost?
Though the national average cost to replace a single window is about $600, it can range anywhere from $200 to $1,200. But costs will differ significantly based on the current condition of your home, the quality of your products, your location and the number of windows you need. Many window companies also offer door installations and other add-ons like coating, shutters, baths and more. Additional services will increase your overall project costs.
Keep in mind that energy-efficient windows may cost more, but Energy Star estimates the upgrade will save you between $101 and $583 per year when you replace single-pane windows and between $27 and $197 per year when you replace double-pane, clear glass windows. Your savings will vary depending on your local climate, energy rates and individual home characteristics.
Getting free quotes from multiple companies is the best way to figure out which one will work best for your budget.
What Services do Window Installers Offer?
The first step when planning a window installation is to decide whether you want a full-frame or pocket installation.
Full-frame installations require replacing the full window — the sill, frame, trim and all. These are most common when you want a new style for your windows or when it has significant rot or deterioration. Full-frame installations are more time-consuming and will increase overall costs. Pocket installations (or retrofits) entail replacing a window within its existing frame, which makes pocket installations more simple and affordable. However, if the frame has any damage or rot, you will most likely need a full-frame installation instead.
If you’re not sure which type of window installation service you should get, your installer should be able to advise you. Generally, the decision is influenced by factors such as the age and condition of the home, the type of building material, budget and time restrictions.
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 Foster City
In our search to find the most reliable, eco-friendly window installers in Foster City, EcoWatch chose the above companies as the top window installation companies in the city. We’ve assessed the best window installation companies in Foster City mainly based on their energy efficient offerings, as it’s what’s best for the environment and for you as a homeowner. Energy-efficient windows have been shown to reduce your electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
This one is self-explanatory, but we’ve chosen to highlight window installers that serve the Foster City area so you can find the right window installation company near you.
Work Quality
When choosing new windows, the quality and range of services often plays just as important of a role in overall efficiency and performance as the brand you opt for. We do give window installers higher marks if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed patterns in recent online reviews to find the companies with the highest rates of customer satisfaction. Customer satisfaction might be the factor we place the most value on, as it reflects the quality of services across most other categories, including warranty, quality of parts, quality of installation, cost, professionalism and more.
Cost
Cheaper windows certainly don’t mean better windows, but we know many of our readers want to keep costs as low as possible. When analyzing the prices of providers, we gave higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
Protecting your investment in new windows is important. That’s why window installation companies that offer lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Foster City’s climate, homeowners will want to mitigate rot, water damage and low efficiency. We factored in local experience to reflect the ability of Foster City window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Foster City, CA Window Replacement FAQs
How much should window installation cost?
The typical cost to install one window can range between $450 and $650. There are several factors that affect the price, such as your property’s location, styles and sizes of windows, the number of windows, the materials used in designing the windows, how energy-efficient the windows are and local labor costs.
What are the different kinds of windows?
The most common kinds of windows for homes include: double-hung and single-hung windows, transom windows, slider windows, awning windows, bay windows, casement windows and picture windows.
Can you replace your own windows?
If you’re handy and have the time and patience to do the job right, you may be able to install your own windows. But if you don’t have the time or skills, we recommend hiring a professional.
How often do you need to replace windows?
Windows usually last around 20 to 30 years, but anytime you see damage on your windows, it’s a good idea to have an expert take a look at them to see if they need any repairs or replacements.