24 Best Window Replacement Companies in Castro Valley, CA (Feb 2023)
Window Companies Near Me
Are you thinking of upgrading your windows? Our guide to the top window installation companies can help you pick the right one for you.
We analyzed all the top window installers in Castro Valley and selected the top 24 based on:
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Customer reviews
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Window replacement expertise
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Popularity with home-owners like you
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Updated January 12, 2023
Why you can trust EcoWatch
Although eco-friendly energy sources like wind and solar are important when it comes to reducing your carbon footprint, improving your home's energy efficiency can also have a considerable impact on home energy conservation. Traditional or damaged windows could lead to having higher energy bills during the winter or summer months.
That's also bad for the environment because the extra energy required by drafty windows increases your carbon footprint.
We've made this list of the top installation companies to help you in your research, so you can not only enjoy brand new windows, but also save money on your energy bills.
Best Overall
Renewal by Andersen
- Great industry reputation
- Award-winning company
- Manufactures products in-house
- More expensive than competition
Excellent Reputation
Milgard Windows & Doors
- EnergyStar Partner
- Wide network of installers
- Lifetime warranty available
- Entails hiring third-party contractors
Best Affordability
Window World
- EnergyStar Partner
- Low prices relative to competitors
- Large serice area
- Quality of service will depend on your area
Best Window Replacement Companies in Castro Valley
The EcoWatch Reviews team assessed many installers in Castro Valley to find the best ones for our readers. The providers we've included in this article scored best in our categories: energy-efficient offerings, customer service, price, availability and more.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Manufactures products in-house
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More expensive than competition
Renewal by Andersen offers the best availability in Castro Valley. This company has been in business since 1995 and currently provides services to nearly every state except Mississippi and West Virginia. Hundreds of positive reviews on customer review websites back the provider's reputation.
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, Andersen may be the provider for you.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to ask for Energy Star windows when inquiring. 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 Castro Valley?Andersen does not mention 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. The best way to know for sure is to get a free quote from the company.

Milgard Windows & Doors
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EnergyStar Partner
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Wide network of installers
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Lifetime warranty available
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Entails hiring third-party contractors
Milgard Windows & Doors provides the best local installation in Castro Valley. Milgard has over 60 years of experience in the industry, and it currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties. The company has a lot of glowing reviews from customers online.
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 variety 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 Castro Valley?Milgard doesn't have any pricing 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 pricing information.

Window World
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EnergyStar Partner
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Low prices relative to competitors
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Large serice area
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Quality of service will depend on your area
Window World has windows expertise in Castro Valley. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This company has been operating since 1995 and currently services 200 locations nationwide. The provider has hundreds 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 perfect provider for you.
Energy Efficiency of Window World WindowsWindow World caters to eco-conscious consumers by providing energy-efficient window offerings. 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 Castro Valley?Window World doesn't have any prices listed on its website, but it's known for offering some of the most affordable window installations around. If you'd like more accurate information, you can request a quote on the company's website.

Universal Windows Direct
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Makes charitable contributions
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Manufactures products in-house
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Wide variety of products and services
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Lifetime warranty
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Limited service area
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Some installations carried out by third-party contractors
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Quality of service will depend on your area
Universal Windows Direct is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This provider has 20 years of experience in the windows business, and it has proved to be one of the best companies in the business.
Universal may be the company for you if you're interested in one that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThe company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products. Not all of Universal's windows are Energy Star certified, so be sure to mention that you'd like Energy Star windows when inquiring.
How much does Universal Windows Direct cost in Castro Valley?Prices aren't available on Universal's website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. The best way to know for sure is to get a free quote from the company.
We have tried to stay unbiased and transparent by including pros and cons for every provider. Additionally, any partnerships do not affect our rankings.
More Window Replacement Companies in Castro Valley
The Glass Guru
Antioch, CA-
Free Quotes
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Good Customer Service
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Locally Recognized for Quality
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Consistent Workmanship
Services Offered
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Glass Showers
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Tempered Glass
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Custom Window Designs
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Aluminum Window Frames
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Full-Service Installations
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Commercial Windows
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Double-Hung
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Sliding Glass
Renewal by Andersen of San Francisco
Hayward, CA-
Free Quotes
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Excellent Customer Service
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Consistent Workmanship
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Educational Website
Services Offered
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Custom Window Designs
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Business Windows
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Double-Hung
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Stained Glass
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Sliding Glass
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Bay Windows
Quality First Home Improvement, Inc.
Campbell, CA-
Price Transparency
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Educational Website
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Excellent Customer Service
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No-fee Quotes
Services Offered
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Residential Windows
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Glass Showers
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Energy-Efficient Options
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Custom Windows
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Double-Hung
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Sliding Glass
Global Glass Enterprise Inc.
San Jose, CA-
No-Hassle Pricing
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Free Quotes
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Educational Website
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Excellent Customer Service
Services Offered
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Residential Windows
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Architectural Glass
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Energy-Efficient Options
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Tempered Glass
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Custom Window Designs
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Aluminum Window Frames
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Business Windows
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Double-Hung
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Sliding Glass
Window Replacement San Leandro
San Leandro, CA-
Price Transparency
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Arrives on Time
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Good Customer Service
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No-fee Quotes
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Best Exteriors
San Leandro, CA-
No-fee Quotes
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Educational Website
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Good Customer Service
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Arrives on Time
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Berkeley
Berkeley, CA-
Free Quotes
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Dependable Service
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Helps Educate Customers
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Price Transparency
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Best Exteriors
Oakland, CA-
Excellent Customer Service
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Free Quotes
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Reliable Appointment Windows
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Educational Website
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay Windows
Window Replacement Vallejo
Vallejo, CA-
No-Hassle Pricing
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Dependable Service
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No-fee Quotes
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Good Customer Service
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Dublin
Dublin, CA-
No-fee Quotes
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Reliable Appointment Windows
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Reliable Service
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Price Transparency
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Livermore
Livermore, CA-
Consistent Workmanship
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Timely Service
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No-Hassle Pricing
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No-fee Quotes
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Pleasanton
Pleasanton, CA-
Consistent Workmanship
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Reliable Appointment Windows
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No-Hassle Pricing
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Good Customer Service
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay Windows
Window Replacement San Francisco
San Francisco, CA-
Helps Educate Customers
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Free Quotes
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No-Hassle Pricing
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Excellent Customer Service
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Oakland
Oakland, CA-
Dependable Service
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No-fee Quotes
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Helps Educate Customers
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Excellent Customer Service
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay Windows
Window Replacement Alameda
Alameda, CA-
Educational Website
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Price Transparency
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Reliable Service
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Free Quotes
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Redwood City
Pleasanton, CA-
Free Quotes
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Reliable Appointment Windows
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Excellent Customer Service
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No-Hassle Pricing
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Roxy Glass
Morton Ave, CA-
Educational Website
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Good Customer Service
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No-fee Quotes
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Price Transparency
Services Offered
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Residential Windows
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Glass Showers
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Energy-Efficient Options
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Tempered Glass
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Custom Window Designs
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Aluminum Window Frames
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Business Windows
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Double-Hung
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Sliding Glass
Window Replacement Fremont
Fremont, CA-
Helps Educate Customers
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Price Transparency
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Timely Service
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Excellent Customer Service
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Walnut Creek
Walnut Creek, CA-
Reliable Appointment Windows
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Helps Educate Customers
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Consistent Workmanship
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No-fee Quotes
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay Windows
Window Replacement Concord
Concord, CA-
Dependable Service
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Free Quotes
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Reliable Appointment Windows
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No-Hassle Pricing
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement Union City
Union City, CA-
Educational Website
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Reliable Appointment Windows
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No-fee Quotes
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Good Customer Service
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window Replacement San Mateo
San Mateo, CA-
Educational Website
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No-fee Quotes
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Consistent Workmanship
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No-Hassle Pricing
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay Windows
Best Exteriors
Oakland, CA-
Reliable Service
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No-fee Quotes
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Good Customer Service
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Price Transparency
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Windows
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Double-Hung
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Sliding Glass
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Bay Windows
Window Replacement Hayward
Hayward, CA-
Educational Website
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Excellent Customer Service
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Timely Service
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Free Quotes
Services Offered
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Architectural Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Bay Windows
How Installing Energy-Efficient Windows in Castro Valley Saves You Money
Switching to energy-efficient windows can help improve the comfort of your home and help you save on electricity bills. Here are more ways switching out your windows could help you:
- 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 filter out damaging UV rays, reducing fading of your furniture, carpet and other valuables.
- Save on energy bills: Installing energy-efficient windows lowers your energy bills by about 12% since you need less energy.
- Decrease your carbon footprint: Since energy-efficient windows improve the insulation in your home, you can cut your indirect greenhouse gas emissions by about 12%, according to Energy Star.
Estimated Cost of Window Replacement in Castro Valley
When considering window installation, each company offers different services and prices. Let's look at some average costs and services.
How Much Do New Windows Cost?
The typical cost to install one window is about $600 but can range from $200 to $1,200. But prices vary remarkably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also offer door installations, which have a higher price tag.
It's also worth noting that energy-efficient windows will typically cost more initially, but Energy Star predicts that upgrading the windows on your Castro Valley home translates to an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. The amount of money you'll save by switching to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
How much your window installation costs will also vary depending on the type of window material you choose for the frames. Wood windows are usually the most expensive, though it depends if 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?
The first step when considering a window installation is to figure out whether you need 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 a great amount of deterioration. Full-frame installations are more time-consuming and will increase overall costs. Pocket installations are simpler and won't cost as much, as they entail merely replacing the window within its existing frame. But if the frame has any damage or deterioration, you should opt for a full-frame installation instead.
Your window installation company can help you decide which type of installation you need.
Best Overall
Renewal by Andersen
- Great industry reputation
- Award-winning company
- Manufactures products in-house
- More expensive than competition
Excellent Reputation
Milgard Windows & Doors
- EnergyStar Partner
- Wide network of installers
- Lifetime warranty available
- Entails hiring third-party contractors
Best Affordability
Window World
- EnergyStar Partner
- Low prices relative to competitors
- Large serice area
- Quality of service will depend on your area
How We Choose the Best Window Installers in Castro Valley
In our search to find the most reliable, eco-friendly window installers in Castro Valley, the EcoWatch Reviews team evaluated dozens of companies before deciding on these. Along with energy efficiency, we assessed each installer and assigned rankings based on 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 a quality window installation company near you.
Work Quality
We're willing to bet that you're looking for a company to do a great job installing windows. We've vetted each company featured in our guide to ensure its technicians are well-qualified and that the company has gotten tons of positive customer feedback to vouch for its service.
Customer Reviews
Another self-explanatory yet super important review factor is customer feedback. If most customers don't have good things to say about their service from a certain company, it won't be featured on EcoWatch.
Cost
This one is a give-and-take: similar to most services, cheap window companies may not provide the most quality service. Still, we want to ensure we're highlighting companies that provide 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. For that reason, window installation companies with lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Due to Castro Valley's climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of Castro Valley window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Castro Valley, CA Window Replacement FAQs
How much does a window install cost?
The national average cost to install a window is around $600 but can range from $200 to $1,200, based on several factors. The price is often dependent on the location of your property, the size of the window and the type and material of the window. Also, remember that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.
Which kind of window is the best?
Generally, double-pane windows will be more efficient than single-pane windows and windows that don't open are more efficient than windows that do. To be sure you're getting the most energy-efficient windows, look for models that have the blue Energy Star certification — that means they're certified energy-efficient by the U.S. Department of Energy.
Can I replace my own windows?
If you're handy and have experience with similar home improvement projects, it's possible to install your own windows. But if you don't have the time or skills, we recommend hiring a professional.
How long does it typically take to install windows?
Because a window takes about 30 minutes to install, around 16 windows can be installed during an 8-hour work day.
Should I replace my windows all at the same time?
If you want to get more efficient windows and save money on energy costs, replacing all the windows together is the only way to gain that benefit. On the other hand, if you have just one or two windows that are damaged or leaky, you can replace just those.