29 Best Window Replacement Companies in Discovery Bay, CA (Mar 2023)
Window Companies Near Me
Thinking about improving your home's energy efficiency? The best window replacement companies can help.
We analyzed all the top window installers in Discovery Bay and selected the top 29 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 March 14, 2023
Why you can trust EcoWatch
The EcoWatch team is all about helping Discovery Bay homeowners make their homes more eco-friendly. Damaged or outdated windows can cost you in electric bills. In fact, the Department of Energy estimates that about 30% of your house's heat or cool air could be lost through your windows.
Replacement windows improve your home's insulation, not only making you and your family more comfortable during the summer and winter, but also saving you some money and helping the environment.
We've put together this guide on the top installation companies to help you in your search, so you can not only enjoy brand new windows, but also save money on your electricity bills.
Best Overall
Renewal by Andersen
- Member of US Green Building Council
- Manufactures products in-house
- Award-winning company
- More expensive than competition
Best Affordability
Window World
- Large serice area
- Lifetime warranty
- Low prices relative to competitors
- Quality of service will depend on your area
Excellent Reputation
Milgard Windows & Doors
- EnergyStar Partner
- Wide network of installers
- Lifetime warranty available
- Entails hiring third-party contractors
Best Window Replacement Companies in Discovery Bay
The EcoWatch Reviews team evaluated dozens of installers in Discovery Bay to find the best window companies for our readers. The providers mentioned in this article scored best in our review categories, which include energy-efficient offerings, customer service, local expertise, price, availability and more.

Renewal by Andersen
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Member of US Green Building Council
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Manufactures products in-house
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Award-winning company
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More expensive than competition
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has about 27 years of experience in the window installation industry. The company has hundreds of positive reviews from customers on online review websites.
You may want to consider choosing Andersen if you're interested in a installer 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 WindowsRenewal by Andersen offers some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you 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 Discovery Bay?Andersen does not outline 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. You can request a free quote on its website for more information about pricing.

Window World
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Large serice area
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Lifetime warranty
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Low prices relative to competitors
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Quality of service will depend on your area
Window World provides windows expertise in Discovery Bay. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has around 27 years of experience in the window replacement industry.
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 provider for you.
Energy Efficiency of Window World WindowsWindow World appeals 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 Discovery Bay?Prices aren't mentioned on Window World's website, but it's known for offering some of the most affordable window installations around. If you'd like more accurate information, you can get a quote on the company's website.

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 has the best local installation in Discovery Bay. It's a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has around 60 years of experience in the window replacement business. Its reputation is backed by many positive reviews from customers online.
You may want to consider opting for 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 Discovery Bay?Although prices are not available on Milgard's website, it offers different kinds of windows at varying price points. You can ask for a free quote on its website for more information about pricing.

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 offers the best warranty in Discovery Bay. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has been in the window industry for around 20 years. Its reputation is backed by many positive reviews on customer review websites.
If you're looking for a company that has an industry-leading warranty covering products, parts and workmanship for life, this may be the perfect company for you.
Energy Efficiency of Universal Windows Direct WindowsUniversal Windows Direct has some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for high-quality Energy Star windows when inquiring. The 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.
How much does Universal Windows Direct cost in Discovery Bay?Universal doesn't have any prices listed on its 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. For more accurate information on the cost, you can inquire about a quote from the company.
One thing to note is that the following companies are national, meaning the quality of customer service may vary depending on your local team. We have tried to remain unbiased and transparent by listing both pros and cons for each company.
More Window Replacement Companies in Discovery Bay
The Glass Guru
Lodi, CA-
Helps Educate Customers
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Locally Recognized for Quality
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Timely Service
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Reliable Service
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
The Glass Guru
Antioch, CA-
Award-Winning
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Reliable Service
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Free Quotes
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No-Hassle Pricing
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-
Consistent Workmanship
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Price Transparency
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Good Customer Service
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Reliable Appointment Windows
Services Offered
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Custom Windows
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Commercial Windows
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Double-Hung
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Stained Glass
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Sliding Glass
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Bay & Bow Windows
The Glass Guru
Fairfield, CA-
Reliable Service
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No-Hassle Pricing
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Helps Educate Customers
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Free Quotes
Services Offered
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Residential Windows
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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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Business Windows
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Double-Hung
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Sliding Glass
Window Replacement San Leandro
San Leandro, CA-
Helps Educate Customers
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Consistent Workmanship
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Price Transparency
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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 Windows
Best Exteriors
San Leandro, CA-
Educational Website
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Price Transparency
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Good Customer Service
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Dependable 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-
Dependable Service
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Price Transparency
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Reliable Appointment Windows
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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 Livermore
Livermore, CA-
Good Customer Service
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Price Transparency
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Educational Website
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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 Window Designs
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Double-Hung
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Sliding Glass
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Bay Windows
Window Replacement Pleasanton
Pleasanton, CA-
Consistent Workmanship
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No-Hassle Pricing
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No-fee Quotes
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Timely 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 Redwood City
Pleasanton, CA-
Dependable Service
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Price Transparency
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Timely Service
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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 Window Designs
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Double-Hung
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Sliding Glass
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Bay Windows
Window Replacement Fremont
Fremont, CA-
Price Transparency
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Reliable Service
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Free Quotes
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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 Window Designs
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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-
Arrives on Time
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Price Transparency
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Excellent Customer Service
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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 Concord
Concord, CA-
Educational Website
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No-fee Quotes
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Timely Service
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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 Union City
Union City, CA-
Arrives on Time
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Price Transparency
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Excellent Customer 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 Windows
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Double-Hung
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Sliding Glass
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Bay Windows
Andersen Windows & Doors
Lodi, CA-
Helps Educate Customers
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No-Hassle Pricing
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Free Quotes
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Good Customer Service
Services Offered
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Architectural Glass
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Doors
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Custom Windows
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Aluminum Window Frames
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Full-Service Installations
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Business Windows
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Double-Hung
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Stained Glass
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Sliding Glass
Window Replacement Hayward
Hayward, CA-
Reliable Service
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Good Customer Service
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Arrives on Time
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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
Bestoff Windows & Construction
Concord, CA-
Excellent Customer Service
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No-Hassle Pricing
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Reliable Service
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No-fee Quotes
Services Offered
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Fast Delivery
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Contra Costa Plate & Mirror Co
Pacheco, CA-
No-Hassle Pricing
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Dependable Service
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Excellent Customer Service
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Free Quotes
Services Offered
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Residential Windows
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Architectural Glass
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Glass Showers
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Tempered Glass
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Custom Windows
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Business Windows
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Double-Hung
Epic Home Upgrades and Construction
San Leandro, CA-
Consistent Workmanship
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Award-Winning
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No-fee Quotes
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No-Hassle Pricing
Services Offered
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Sliding Glass
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Custom Window Designs
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Energy-Efficient Options
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Double-Hung
R & M Quality Windows & Doors
Newark, CA-
Educational Website
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No-fee Quotes
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Excellent Customer Service
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Consistent Workmanship
Services Offered
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Residential Windows
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Custom Windows
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Full-Service Installations
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Double-Hung
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Sliding Glass
Stockton Window Replacement
Stockton, CA-
Consistent Workmanship
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Helps Educate Customers
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No-Hassle Pricing
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Excellent Customer Service
Services Offered
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Fast Delivery
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Custom Windows
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Lafayette Glass Company
Lafayette, CA-
Consistent Workmanship
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No-fee Quotes
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Helps Educate Customers
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Price Transparency
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Sliding Glass
Window Replacement Stockton
Stockton, CA-
Arrives on Time
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Price Transparency
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Dependable Service
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Excellent Customer Service
Services Offered
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Fast Delivery
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Custom Window Designs
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Danville Glass Company
Danville, CA-
Dependable Service
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Free Quotes
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Reliable Appointment Windows
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Price Transparency
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Sliding Glass
Landmark Exteriors
Livermore, CA-
Good Customer Service
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No-Hassle Pricing
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Reliable Service
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Arrives on Time
Services Offered
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Residential Windows
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Custom Window Designs
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Aames Windows & Doors Inc
Alamo, CA-
Reliable Appointment Windows
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Good Customer Service
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Price Transparency
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Free Quotes
Services Offered
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Fast Delivery
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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
Custom Exchange Windows
Pleasanton, CA-
Price Transparency
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Good Customer Service
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Helps Educate Customers
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Dependable Service
Services Offered
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Custom Window Designs
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Energy-Efficient Options
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Sliding Glass
APW Window Replacement
Pleasanton, CA-
Good Customer Service
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Reliable Service
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Free Quotes
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Price Transparency
Services Offered
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Residential Windows
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Architectural Glass
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Custom Windows
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Commercial Windows
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Double-Hung
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Sliding Glass
Brentwood Glass Shower and Window Company
Brentwood, CA-
Educational Website
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Locally Recognized for Quality
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No-fee Quotes
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Excellent Customer Service
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Sliding Glass
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Glass Showers
How Installing Energy-Efficient Windows in Discovery Bay Saves You Money
Energy-efficient windows can benefit you in several ways. Here are a few reasons you may want to think about making the switch:
- Save money on electricity bills: The Department of Energy estimates that heat gained or lost via windows makes up around 25-30% of energy use in your home. Upgrading to energy-efficient windows can help reduce that amount, which helps you save more on your bills.
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes usually have windows that are outdated, leaky or potentially even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.
- Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help prevent your floors, carpets and furniture from fading by filtering out UV rays.
- Decrease your carbon footprint: By using less energy once switching to Energy Star certified windows, you'll also be lowering your indirect greenhouse gas emissions by about 12%, according to Energy Star.
Estimated Cost of Window Replacement in Discovery Bay
Let's go over the cost of replacing your windows and the types of services offered by installers.
How Much Do New Windows Cost?
According to our market research, the average cost of replacing a single window is around $600. However, window replacement costs can range from $200 to $1,200 per window. But costs will differ considerably depending on the current condition of your home, the quality of your products, the number of windows you need and your location. A lot of window companies also offer door installations and other add-ons like baths, shutters, coating and more. Additional services will increase your overall project costs.
It's important to keep in mind that windows with higher 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 Discovery Bay homeowners $579+ a year when replacing single-pane windows.
We advise requesting free quotes from several window installation companies to find the right windows and the company that works best for you.
What Services do Window Installers Offer?
The first question to ask yourself when planning to replace your windows is: Do you need a full-frame installation or a pocket installation?
A full-frame installation is a total window replacement. It involves taking out the old window, the sill, and the exterior and interior trim. It can also involve extra materials, including 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 surrounding the window after a full-frame installation. Pocket installations (also known as retrofits) are when you replace a window while leaving the existing frame. Pocket installations are on the simpler end and won't carry as large a bill, but you can't do this type of installment if you have any pre-existing rot or water damage.
If you're not sure which type of window installation service you should get, your installer can advise you. Generally, the decision is based on factors such as the age and condition of the home, the type of building material, budget and time restrictions.
Best Overall
Renewal by Andersen
- Member of US Green Building Council
- Manufactures products in-house
- Award-winning company
- More expensive than competition
Best Affordability
Window World
- Large serice area
- Lifetime warranty
- Low prices relative to competitors
- Quality of service will depend on your area
Excellent Reputation
Milgard Windows & Doors
- EnergyStar Partner
- Wide network of installers
- Lifetime warranty available
- Entails hiring third-party contractors
How We Choose the Best Window Installers in Discovery Bay
EcoWatch differs from most reviewers because we examine these companies through a sustainability lens. Along with energy efficiency, we analyzed each installer and ranked them based on the following methodology:
Service Area
Since this is a guide for Discovery Bay, we gave more points to companies that cover the city. There are certainly other reputable providers that didn't make our list because of the low odds that they would serve the average homeowner in Discovery Bay.
Work Quality
When picking new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand you choose. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed patterns in recent customer feedback to determine the companies with the highest rates of customer satisfaction, weighted by sample size. 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, cost, quality of parts, professionalism, quality of installation and more.
Cost
This one is a give-and-take: similar to other services, cheap window companies may not provide the highest quality service. Still, we want to make sure we're highlighting companies that offer a wide range of price and financing options so they're accessible to most homeowners.
Warranty
As discussed, windows are a considerable investment, so you'll want to be certain that investment is well protected. Window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Because of Discovery Bay's climate, homeowners will want to mitigate water damage, low efficiency and rot. We factored in local experience to reflect the ability of Discovery Bay window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Discovery Bay, CA Window Replacement FAQs
How much should a window install cost?
The national average cost of installing one window is around $600 but can range from $200 to $1,200, depending on a variety of factors. The price is usually dependent on the size of the window, the location of your property 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. If you want to be sure you'll have the most energy-efficient windows, look for models with the blue Energy Star certification attached to them — that means they're certified energy-efficient by the U.S. Department of Energy.
Do you really have to use a window installation company?
You should hire a window installation professional whenever you want to replace your windows. Installing windows is a complicated process that can take a lot of time, so it's best left to the professionals.
What time of year is a good time to replace my windows?
Though you can install windows any time of year, warmer weather is typically better for replacing windows. In addition, it shouldn't be raining, because rain can make the installation more difficult.
Should I replace all my windows at once?
If your windows are greater than 20 years old, you most likely need to replace all of them. At that point, they are typically less efficient, draftier and/or more damaged than new windows. Replacing your windows all at the same time will involve less paperwork and less time.