20 Best Window Companies in Castro Valley, CA (2025 Reviews)

If you’re looking to upgrade to new windows, our list of the best window installation companies can help.

We analyzed all the top-rated window companies in Castro Valley 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.

The EcoWatch team is all about finding solutions for eco-conscious homeowners in Castro Valley. If your windows are outdated or damaged, you could be losing 25-30% of your house’s heat or cool air right out of them.

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.

Efficient windows are particularly important in Castro Valley, where summers are long and hot. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $531 a year.

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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 Castro Valley

The EcoWatch Reviews team researched dozens of installers in Castro Valley to find the best window companies for our readers. The installers in this article scored the best in our review categories, such as energy-efficient offerings, customer service, price, availability, local expertise 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 provides windows expertise in Castro Valley. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This window installation company has been in business since 1995 and currently provides services to 200 locations nationwide. The company has a lot of glowing 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

Window World is an Energy Star partner and has a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Window World representative when inquiring about services.

How much does Window World cost in Castro Valley?

Window World doesn’t have any cost information available on its website, but it's known for offering some of the most affordable window installations around. Receiving 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 provides the best local installation in Castro Valley. It's a family-owned and -operated window replacement company, which primarily serves the West Coast. This window installation company has been in business since 1962 and currently provides services to Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties. The company has a lot of glowing 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

Milgard Windows & Doors is an Energy Star partner and has a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Milgard representative when inquiring about services.

How much does Milgard Windows & Doors cost in Castro Valley?

Milgard doesn’t have any cost information available on its website, but it offers different kinds of windows at varying price points. Receiving 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 provides the best availability in Castro Valley. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This window installation company has been in business since 1995 and currently provides services to nearly every state except Mississippi and West Virginia. The company has a lot of glowing 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

Renewal by Andersen is an Energy Star partner and has a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Andersen representative when inquiring about services.

How much does Renewal by Andersen cost in Castro Valley?

Andersen doesn’t have any cost information available 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. Receiving a free quote on its website is the best way to get more accurate information.

We aim to be unbiased and transparent by including pros and cons for each company we review. Additionally, our rankings are not influenced by any partnerships.

More Window Companies in Castro Valley

Renewal by Andersen of San Francisco

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

Services Offered

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

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

Mr Window Replacement

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

Services Offered

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

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

Cal Coast Window & Door

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

Services Offered

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

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

Quality Windows & Doors

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

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

Golden Heights Remodeling INC

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

GENERAL B CONTRACTOR

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

Santa Rosa Window Tint

Santa Rosa, 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

Website: http://www.santarosawindowtint.com/
Address: 3721 Santa Rosa Ave b4, Santa Rosa, CA 95407
Phone: (707) 879-8468

Alexander Company

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

Services Offered

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

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

Bay Builders and Remodeling Inc.

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

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

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

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

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

Window Factory

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

Services Offered

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

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

American Window Specialist

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

Services Offered

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

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

The Glass Guru

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

Services Offered

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

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

Services Offered

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

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

Services Offered

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

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

Integrity Windows & Doors

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

Services Offered

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

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

American Vision Windows

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

Services Offered

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

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 Mirrors
  • Service icon Glass Showers
  • Service icon Bay Windows
  • Service icon Glass Doors

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

American Window Systems, Inc.

Napa, CA
4.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Skylights
  • Service icon Window Replacement/Installation

Website: https://www.amwinsys.com/
Address: 1729 Action Ave suite b, Napa, CA 94559
Phone: (707) 244-7260

American Glass Co

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

Services Offered

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

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

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

Energy-efficient windows can offer benefits in several ways. Here are some reasons you may want to take the plunge and make the switch:

  • Reduce your carbon footprint: In Castro Valley, you can lower your indirect greenhouse gas emissions by about 117 pounds per year once you install energy-efficient windows.
  • Save on energy bills: The Department of Energy estimates that heat gained or lost via windows makes up around 25-30% of energy use in your home. Switching to energy-efficient windows can help lower that number, which helps you save $531 a year on your bills.
  • Protect your investment: Upgrading and repairing your windows is an important part of maintaining your property and its value, particularly if your home is on the older side.
  • Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.

Estimated Cost of Window Replacement in Castro Valley

Let’s take a look at the cost of replacing your windows and the kinds of services offered by installers.

How Much Do New Windows Cost?

Even though the average cost to install a single window is about $600, it can range anywhere from $200 to $1,200. These amounts are based on specific characteristics of your installation, such as type, material, number of windows, size, the location of your home and more.

With windows, efficiency is the most important factor for most homeowners. High efficiency windows may cost more upfront, but by increasing the efficiency of your home — particularly if you live in a hot climate — they can give you decades of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save Castro Valley homeowners $531+ a year after replacing single-pane windows.

The cost of your window installation will also vary depending on the kind of material you choose for the frames. Wood windows are generally the most expensive, but it depends on whether they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are shown to be more efficient.

What Services do Window Installers Offer?

There are generally two kinds of window installation services: full-frame and pocket installations.

A full-frame installation is a total window replacement. It involves removing the old window, the windowsill, and the exterior and interior trim. It can also involve extra materials, like insulation and drip edges, which raise the overall cost of the project. It’s also worth noting that it’s not uncommon for homeowners to have to touch up the paint around the window after a full-frame installation. A pocket installation involves replacing a window within the old frame. This means instead of taking out the whole unit and rebuilding it, the contractor will just slide the replacement window (also called a retrofit or insert window) into the frame.

Your window installer should be able to help you decide which type of installation you need.

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 Castro Valley

In our hunt to make your home improvements easier and more eco-friendly in Castro Valley, the EcoWatch team evaluated dozens of companies before settling on these. Along with energy efficiency, we evaluated each installer and assigned rankings using the following methodology:

Service Area

This one is pretty self-explanatory, but we’ve chosen to highlight window installation companies that serve a wide variety of states and cities so you can find the right window installation company near you.

Work Quality

When it comes to new windows, the quality and range of services can often play just as important of a role in insulation and performance as the brand you get. We do give window installers higher marks if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

Another self-explanatory yet very important review factor is customer feedback. If the majority of customers don’t have nice things to say about their service from a certain window installation company, it won’t be featured on EcoWatch.

Cost

Cheaper windows certainly don’t mean better windows, but we know many of our readers would like to keep costs as low as possible. When analyzing providers’ prices, we awarded higher points to companies with reasonable prices and accessible financing rather than “cheaper” services.

Warranty

As discussed previously, windows are a significant investment, so you’ll want to be certain that investment is well protected. Window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

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

Castro Valley, CA Window Replacement FAQs

How much should a window install cost?

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

What are the most common types of replacement windows?

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

What do window installers do?

Window installers visit your home to remove your old windows and replace them with new ones. Some companies install products sold by other companies, whereas others install their own windows. The installer will also clean up after the installation.

What time of year is the best time to replace my windows?

Replacement windows can be installed during any season, but autumn might be best. Regardless of when you install them, the contractors will take steps to make sure that too much hot or cold air doesn’t get into your house, so the temperature outside doesn’t necessarily matter that much. What’s most important is that the weather should be dry.