20 Best Window Companies in Discovery Bay, CA (2023 Reviews)
Looking to improve your house's insulation? The best window replacement companies can help.
We analyzed all the top-rated window companies in Discovery Bay and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
Although green energy sources like wind and solar are important when it comes to decreasing your carbon footprint, improving your home's energy efficiency can also have a considerable impact on home energy conservation. According to the Department of Energy, heat or cool air lost through traditional, outdated windows could make up 25-30% of heating and cooling usage.
Replacement windows improve your home's insulation, not only making you more comfortable during extreme temperatures, but also saving you some money and helping the environment.
We've made a 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 power bills.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Discovery Bay
The EcoWatch team researched dozens of installers that serve the Discovery Bay area to find the top window installation companies by our standards. The companies in this article passed our review standards for energy-efficient offerings as well as local expertise, price, customer service and beyond.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World has windows expertise in Discovery Bay. Window World has been in the window installation business for about 27 years. The provider has plenty of positive reviews from customers on online review websites.
Window World may be the company for you if you're interested in one that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsWindow World carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality Energy Star windows when inquiring. 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?Window World doesn’t have any pricing information available on its website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate pricing 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
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Limited additional services
Milgard Windows & Doors is a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has around 60 years of experience in the window installation industry.
Milgard may be the company for you if you're looking for one 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?Prices are not available on Milgard’s website, as the cost of window replacement differs based on how many and what type(s) of windows you need. However, it offers different kinds of windows at varying price points. If you’d like to know for sure, you can get a quote on the company’s website.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen has the best availability in Discovery Bay. Andersen has been in the window installation business for about 27 years. The provider has plenty of positive reviews from customers on online review websites.
Andersen may be the company for you if you're interested in one 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 carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want high-quality 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 doesn’t have any pricing 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. If you’d like more accurate pricing information, you can get 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 company has 20 years of experience in the window installation industry, and it has proved to be one of the most reputable companies in Discovery Bay. The provider has plenty of positive reviews from customers on online review websites.
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 WindowsUniversal Windows Direct caters to eco-conscious consumers by providing energy-efficient window offerings. 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?Prices aren’t mentioned 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. You can inquire about a free quote on its website for more information about pricing.
We strive to remain unbiased and transparent by including pros and cons for each company we review. Additionally, our rankings are not affected by any partnerships.
More Window Companies in Discovery Bay
Renewal by Andersen of San Francisco
Hayward, CA-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Commercial Windows
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Stained Glass
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Glass Showers
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Custom Window Designs
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Residential Windows
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Sliding Glass
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Bay Windows
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Double-Hung
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Window Replacement
Window World of Greater Sacramento
Sacramento, CA-
Price Transparency
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Educational Website
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Good Customer Service
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Timely Service
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Free assessment
Services Offered
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Custom Window Designs
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Residential Windows
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Window Replacement
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Glass Showers
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Double-Hung
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Sliding Glass
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Fast Delivery
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Bay Windows
The Glass Guru
Antioch, CA-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
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Timely Service
Services Offered
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Window Replacement
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Sliding Glass
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Stained Glass
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Window Repair
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Commercial Windows
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Custom Window Designs
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Residential Windows
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Tempered Glass
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Full-Service Installations
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Double-Hung
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Glass Showers
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Aluminum Window Frames
Brentwood Glass Shower and Window Company
Brentwood, CA-
Timely Service
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Glass Showers
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Residential Windows
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Custom Window Designs
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Full-Service Installations
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Fast Delivery
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Window Replacement
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Double-Hung
Antioch Glass
Antioch, CA-
Educational Website
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Free assessment
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Good Customer Service
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Price Transparency
Services Offered
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Glass Showers
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Window Repair
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Commercial Windows
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Custom Window Designs
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Sliding Glass
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Residential Windows
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Tempered Glass
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Window Replacement
Stockton Window Replacement
Stockton, CA-
Educational Website
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Free assessment
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Timely Service
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Good Customer Service
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Price Transparency
Services Offered
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Residential Windows
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Double-Hung
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Fast Delivery
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Custom Window Designs
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Window Replacement
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Commercial Windows
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Bay Windows
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Sliding Glass
Home Services at The Home Depot
Tracy, CA-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Glass Showers
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Window Replacement
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Stained Glass
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Residential Windows
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Commercial Windows
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Custom Window Designs
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Fast Delivery
Window Replacement Stockton
Stockton, CA-
Good Customer Service
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Timely Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Double-Hung
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Sliding Glass
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Bay Windows
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Window Replacement
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Custom Window Designs
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Fast Delivery
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Commercial Windows
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Residential Windows
Tracy Glass Shop
Tracy, CA-
Good Customer Service
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Educational Website
Services Offered
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Commercial Windows
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Window Replacement
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Custom Window Designs
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Bay Windows
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Residential Windows
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Glass Showers
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Fast Delivery
Reborn Cabinets Inc.
Livermore, CA-
Free assessment
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Good Customer Service
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Price Transparency
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Educational Website
Services Offered
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Custom Window Designs
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Glass Showers
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Fast Delivery
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Residential Windows
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Commercial Windows
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Window Replacement
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Double-Hung
Sears Heating and Air Conditioning
Livermore, CA-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Custom Window Designs
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Glass Showers
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Residential Windows
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Window Replacement
Custom Exteriors, Inc
Pleasanton, CA-
Good Customer Service
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Price Transparency
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Educational Website
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Free assessment
Services Offered
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Full-Service Installations
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Fast Delivery
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Residential Windows
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Bay Windows
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Window Replacement
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Custom Window Designs
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Sliding Glass
Cal Coast Window & Door
Pleasanton, CA-
Educational Website
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Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Full-Service Installations
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Residential Windows
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Energy-Efficient Options
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Sliding Glass
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Window Replacement
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Custom Window Designs
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Bay Windows
APW Window Replacement
Pleasanton, CA-
Free assessment
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Good Customer Service
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Educational Website
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Price Transparency
Services Offered
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Commercial Windows
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Bay Windows
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Double-Hung
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Window Repair
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Residential Windows
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Custom Window Designs
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Window Replacement
Delta Glass Co
Stockton, CA-
Price Transparency
Services Offered
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Commercial Windows
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Glass Showers
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Custom Window Designs
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Window Replacement
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Residential Windows
Green Technology Windows and Doors
Manteca, CA-
Free assessment
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Price Transparency
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Good Customer Service
Services Offered
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Commercial Windows
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Residential Windows
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Window Replacement
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Bay Windows
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Custom Window Designs
Quality Windows & Doors
Pleasanton, CA-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Bay Windows
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Window Replacement
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Custom Window Designs
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Double-Hung
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Glass Showers
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Full-Service Installations
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Residential Windows
Windows & Beyond
Concord, CA-
Free assessment
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Educational Website
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Timely Service
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Good Customer Service
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Price Transparency
Services Offered
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Window Replacement
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Bay Windows
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Double-Hung
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Commercial Windows
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Energy-Efficient Options
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Residential Windows
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Glass Showers
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Custom Window Designs
Custom Exchange Windows
Pleasanton, CA-
Educational Website
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Free assessment
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Good Customer Service
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Price Transparency
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Timely Service
Services Offered
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Window Replacement
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Residential Windows
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Custom Window Designs
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Energy-Efficient Options
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Sliding Glass
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Bay Windows
Don's Mobile Glass, Inc.- Manteca
Manteca, CA-
Free assessment
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Good Customer Service
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Price Transparency
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Educational Website
Services Offered
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Double-Hung
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Window Replacement
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Custom Window Designs
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Glass Showers
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Residential Windows
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Commercial Windows
Calculate how much you can expect to pay for window installation and replacement in Discovery Bay, CA using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in Discovery Bay Saves You Money
Upgrading to energy-efficient windows can help improve the comfort of your home and help you save on electricity bills. Here are more details about how switching out your windows could help you:
- 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.
- Better temperature control in your home: When you reside in a city like Discovery Bay where the winters can be chilly, you usually need to rely on your heater to keep your house warm. Energy-efficient windows can lower the amount of heat lost through your windows when heating your home.
- Save on power bills: Switching to energy-efficient windows reduces your energy bills by about 12% because you need less energy.
- Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes tend to have windows that are outdated, leaky or potentially even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.
Estimated Cost of Window Replacement in Discovery Bay
When looking into window installation, each company offers varying services and prices. Let's take a look at some average costs and services.
How Much Do New Windows Cost?
Generally, homeowners in Discovery Bay can expect that most replacement window installations will range from $250 to $1,200, with the most common installations sitting at around $600. But costs 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 provide door installations and replacements, which will make your project cost more.
It's important to keep in mind that windows with the best efficiency may cost more initially but can save you hundreds of dollars by decreasing your energy bills. Investing in certified energy-efficient windows can save Discovery Bay homeowners $579+ a year when replacing single-pane windows.
Something else that influences the total cost is the material of the frame you choose. Aluminum frames are typically the least pricey and are sturdy and relatively maintenance-free, but they provide poor insulation. On the other hand, wood frames cost the most, as they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.
What Services do Window Installers Offer?
There are generally two kinds of window installation services: full-frame and pocket installations.
Full-frame installations involve replacing the full window, including the frame, trim and sill. You most likely need a full-frame installation when you want a new style or your window has considerable deterioration. Because full-frame installations are more involved, they will increase the overall cost. Pocket installations (or retrofits) involve replacing a window within its existing frame, which makes pocket installations less labor-intensive and costly. However, if the frame has any damage or rot, you will likely need a full-frame installation instead.
If you're not sure which type of window installation service you need, your installer should be able to advise you. Generally, the decision is based on factors like the age and condition of the home, the type of building material, budget and time restrictions.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Discovery Bay
EcoWatch is different from other reviewers, as we examine these companies through a sustainability lens. We have reviewed the top window replacement companies in Discovery Bay primarily based on their energy efficient offerings, as it's the most sustainable option and the best one for homeowners. Energy-efficient windows can lower electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
Since this is a guide for Discovery Bay, we gave more points to companies that serve the city. There are other reputable providers that didn't make the list because they wouldn't be able to serve homeowners in Discovery Bay.
Work Quality
We're willing to bet that you're looking for professionals who do a great job installing windows. We've vetted each installer included on this list to make sure its technicians are well-qualified and that the company has gotten plenty of positive customer feedback to vouch for its service.
Customer Reviews
Another self-explanatory yet super important review factor is customer feedback. If the majority of customers don't have good feedback about their service from a certain installer, it won't be featured on EcoWatch.
Cost
This one is a give-and-take: as with most services, cheap window installation companies won't always provide the most quality service. Still, we want to ensure we're highlighting companies that provide 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 make sure that investment is well protected. Window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Discovery Bay's climate, homeowners need to be wary of rot, low efficiency and water damage. We factored in local experience to reflect the ability of Discovery Bay window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Discovery Bay, CA Window Replacement FAQs
How much does a window install cost?
The national average cost to install a window is about $600 but can range between $200 and $1,200, depending on several factors. The price is generally 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?
A window's energy efficiency is influenced by several factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient and are certified by the U.S. Department of Energy.
Can I replace my own windows?
While you can install your own windows, doing so requires a lot of time and experience with home improvement projects. Hiring a professional can help ensure that the job is done properly and that you won't have to spend the time and effort to do it yourself.
Should I replace all my windows at the same time?
If your windows are more than 20 years old, you probably need to replace all of them. By that point, they are usually less efficient, draftier and/or more damaged than new windows. Doing your windows all at once will involve less paperwork and less stress.