20 Best Window Companies in Westmont, 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 Westmont 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 clean energy sources like wind and solar are important when it comes to reducing your carbon footprint, improving your home's efficiency can also have a big impact on home energy conservation. Drafty windows could lead to having higher power bills during the winter or summer months.
That's bad for both your bank account and the environment, but one of the top window installation companies can help with that.
So if you're building a new home, renovating or replacing your windows in Westmont, you've found the best place to get started.
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 Westmont
The EcoWatch team examined dozens of installers in Westmont to find the best ones for our readers. The providers in this article scored the best in our review categories, such as energy-efficient offerings, availability, local expertise, price, customer service and more.

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 provides windows expertise in Westmont. This provider has 27 years of experience in the window installation business, and it has proved to be one of the most reputable companies in the business. The company has a lot of positive reviews from customers on online review websites.
It 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 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 Westmont?Window World doesn’t have any cost information listed on its website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate information is to receive 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
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Limited additional services
Milgard Windows & Doors provides the best local installation in Westmont. This provider has 60 years of experience in the window installation business, and it has proved to be one of the most reputable companies in the business. The company has a lot of positive reviews from customers on online review websites.
It 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 WindowsMilgard Windows & Doors carries some Energy Star windows, but note that not all its windows are energy-efficient, so be sure to mention that you want Energy Star windows when inquiring. 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 Westmont?Milgard doesn’t have any cost information listed on its website, but it offers different kinds of windows at varying price points. The best way to get more accurate information is to receive a free quote from the company.

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 provides the best availability in Westmont. This provider has 27 years of experience in the window installation business, and it has proved to be one of the most reputable companies in the business. The company has a lot of positive reviews from customers on online review websites.
It 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 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 Westmont?Andersen doesn’t have any cost information listed 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 get more accurate information is to receive a free quote from the company.

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 been in business since 2002 and currently services 27 states nationwide. The provider has hundreds of positive reviews from customers on online review websites.
You may want to consider going with Universal if you're interested in a installer that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsUniversal Windows Direct’s commitment to sustainability can be seen in its 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 Westmont?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. Receiving a free quote on its website is the best way to get more accurate pricing information.
We've recommended companies with shining reputations, but keep in mind some national companies have independently owned locations in Westmont, so the quality of service may depend on your local crew. We have tried to stay unbiased and transparent by listing pros and cons for each company we reviewed.
More Window Companies in Westmont
Renewal by Andersen of Los Angeles
Torrance, CA-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Custom Window Designs
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Window Replacement
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Stained Glass
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Commercial Windows
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Double-Hung
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Glass Showers
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Residential Windows
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Sliding Glass
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Fast Delivery
Window World of Orange County
Anaheim, CA-
Price Transparency
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Custom Window Designs
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Bay Windows
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Window Replacement
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Residential Windows
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Sliding Glass
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Fast Delivery
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Double-Hung
The Glass Guru
Torrance, CA-
Free assessment
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Good Customer Service
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Timely Service
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Educational Website
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Price Transparency
Services Offered
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Glass Showers
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Double-Hung
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Aluminum Window Frames
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Stained Glass
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Window Repair
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Tempered Glass
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Custom Window Designs
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Residential Windows
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Window Replacement
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Full-Service Installations
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Sliding Glass
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Commercial Windows
Smart Window Company
Torrance, 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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Custom Window Designs
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Commercial Windows
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Tempered Glass
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Double-Hung
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Stained Glass
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Residential Windows
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Aluminum Window Frames
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Sliding Glass
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Energy-Efficient Options
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Window Replacement
GreenCal Construction Inc.
Bellflower, CA-
Price Transparency
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Educational Website
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Timely Service
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Good Customer Service
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Free assessment
Services Offered
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Custom Window Designs
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Commercial Windows
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Residential Windows
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Window Replacement
Triangle Construction, Inc.
Culver City, CA-
Timely Service
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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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Window Replacement
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Glass Showers
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Aluminum Window Frames
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Residential Windows
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Custom Window Designs
Home Services at The Home Depot
Los Angeles, CA-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Stained Glass
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Residential Windows
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Custom Window Designs
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Window Replacement
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Commercial Windows
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Glass Showers
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Fast Delivery
GOLDEN BEAR GLASS & WINDOWS LLC
Los Angeles, CA-
Educational Website
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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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Residential Windows
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Custom Window Designs
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Aluminum Window Frames
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Energy-Efficient Options
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Tempered Glass
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Commercial Windows
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Window Replacement
Cornerstone Windows & Patio Doors
Torrance, CA-
Price Transparency
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Educational Website
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Good Customer Service
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Free assessment
Services Offered
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Bay Windows
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Residential Windows
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Full-Service Installations
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Custom Window Designs
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Double-Hung
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Window Replacement
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Sliding Glass
Discount Window And Door
Redondo Beach, CA-
Price Transparency
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Free assessment
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Good Customer Service
Services Offered
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Window Replacement
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Aluminum Window Frames
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Energy-Efficient Options
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Sliding Glass
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Custom Window Designs
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Residential Windows
LUXE windows + doors
5168 W Pico Blvd, CA-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Double-Hung
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Full-Service Installations
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Window Replacement
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Sliding Glass
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Residential Windows
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Custom Window Designs
Cut Once Remodeling
Torrance, CA-
Price Transparency
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Good Customer Service
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Free assessment
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Timely Service
Services Offered
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Custom Window Designs
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Residential Windows
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Window Replacement
American Home Center
Downey, CA-
Educational Website
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Free assessment
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Price Transparency
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Good Customer Service
Services Offered
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Window Replacement
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Custom Window Designs
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Fast Delivery
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Residential Windows
Lion Windows And Doors
Los Angeles, CA-
Price Transparency
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Free assessment
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Good Customer Service
Services Offered
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Window Replacement
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Custom Window Designs
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Full-Service Installations
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Energy-Efficient Options
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Residential Windows
Cook's Doors & Windows
Lawndale, CA-
Educational Website
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Good Customer Service
Services Offered
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Window Replacement
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Fast Delivery
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Aluminum Window Frames
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Residential Windows
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Custom Window Designs
Courtesy Glass & Mirror
Bellflower, CA-
Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Window Repair
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Custom Window Designs
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Commercial Windows
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Glass Showers
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Residential Windows
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Window Replacement
Sears Heating and Air Conditioning
Santa Fe Springs, CA-
Educational Website
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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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Custom Window Designs
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Fast Delivery
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Residential Windows
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Glass Showers
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Window Replacement
Batchelor Windows & Doors Inc.
Signal Hill, CA-
Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Window Replacement
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Residential Windows
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Aluminum Window Frames
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Fast Delivery
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Custom Window Designs
Elite Vinyl Windows Inc.
Whittier, CA-
Free assessment
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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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Window Replacement
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Sliding Glass
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Energy-Efficient Options
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Residential Windows
Pella Window and Door Showroom of South Pasadena, CA
S Pasadena, 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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Fast Delivery
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Double-Hung
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Sliding Glass
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Stained Glass
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Commercial Windows
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Window Replacement
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Aluminum Window Frames
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Residential Windows
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Bay Windows
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Custom Window Designs
Calculate how much you can expect to pay for window installation and replacement in Westmont, 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 Westmont Saves You Money
When you upgrade to energy-efficient windows, you may see a few perks, including:
- Protect your investment: Keeping your windows up to date is an important part of maintaining your property and its real estate value, particularly if you have an older home.
- Reduce your carbon footprint: By using less energy once upgrading to energy-efficient windows, you'll also be cutting your carbon dioxide emissions by about 12%, according to Energy Star.
- Save money on energy bills: Once you switch to energy-efficient windows, you can see a reduction in your bills by about 12% because you'll require less energy to heat or cool your home.
- Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
Estimated Cost of Window Replacement in Westmont
Windows come in various styles, shapes and purposes, so costs and services will differ remarkably depending on your project. Below, we go over the typical cost and services that you'll find from window replacement companies.
How Much Do New Windows Cost?
The average cost to replace one window is about $600 but can range from $200 to $1,200. How much it will cost depends on several factors, including size, the location of your home, type, material, number of windows and more.
Whether or not you pick energy-efficient windows is another factor that will influence the cost. These will almost always cost more than other windows, but on the other hand, you can save about $509 a year on your energy bills in Westmont.
The cost of your window installation will also vary based on the type of material you choose for the frames. Wood windows are generally 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?
There are generally two types of window installation services: full-frame and pocket installations.
Full-frame installations are necessary when you want a new style or your window has a lot of deterioration. With this service, your professionals will replace the full window, including the sill, frame and trim. Pocket installations (also known as retrofits) are when you replace a window while leaving the old frame. Pocket installations are simpler and won't carry as large a bill, but you can't do this kind of installment if you have any pre-existing rot or water damage.
If you're still trying to decide which type of installation you should get, you can talk to your installer and get their recommendation. The choice mostly depends on how old the frames are and if there's any damage present.
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 Westmont
The EcoWatch Reviews team is different from other reviewers because we assess these companies through a sustainability lens. We've assessed the best window installation companies in Westmont mostly based on their energy efficient offerings, as it's what's best for the environment and for you as a homeowner. Energy Star certified windows have been shown to lower power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
This one is self-explanatory, but we've chosen to highlight window installation companies that serve a wide variety of states and cities so you can find the right window installation company near you.
Work Quality
We're certain that you're looking for professionals who do a great job installing windows. We've vetted each installer featured in our guide to make sure its technicians are well-qualified and that the company has gotten a lot of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed trends in recent online reviews to determine the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction might be the factor we place the most value on, as it indicates the quality of services across nearly every category, including warranty, professionalism, cost, quality of parts, quality of installation and more.
Cost
Cheaper windows certainly don't mean better windows, but we know many of our readers would like to keep costs low when possible. When analyzing the prices of providers, we gave higher points to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
As discussed previously, windows are a sizable investment, so you'll want to be certain that investment is well protected. Window installation companies that offer lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have a proven track record in the industry. Window installers that have more years of experience will earn higher rankings by our standards. We like to see at least ten years of experience.
Westmont, CA Window Replacement FAQs
What is the average cost to replace windows in a home?
The typical cost to replace a window ranges from $450 to $650. There are many factors that affect how much it costs, which include local labor costs, how energy-efficient the windows are, the materials used in designing the windows, styles and sizes of windows, your property's location and the number of windows.
Which type of window should I get?
Generally, double-pane windows are more efficient than single-pane windows and windows that don't open are more efficient than windows that do. To be sure you'll get 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.
When do I have to use a window installation company?
You should use a window installation professional whenever you want to replace your windows. Installing windows is a involved process that can be difficult to do on your own, so it's best handled by the professionals.
Should I replace my windows all at once?
If your windows are more than 20 years old, you probably need to replace all of them. At that point, they are usually less efficient, draftier and/or more damaged than new windows. Replacing your windows all at once will involve less paperwork and less time.