20 Best Window Companies in Thousand Oaks, CA (2023 Reviews)
Looking to improve your property's energy efficiency? The top window replacement companies can help.
We analyzed all the top-rated window companies in Thousand Oaks 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
A review of the best window replacement companies in Thousand Oaks may not seem like the most captivating article on EcoWatch, but trust us, windows impact your life more than you might realize. If you have outdated, drafty windows, your HVAC system could be working overtime to heat or cool your home. This means higher energy bills.
That's also bad news for the environment because the extra energy used by damaged windows increases your carbon footprint.
We've put together this list of the best installation companies to help you in your search, so you can not only take advantage of brand new windows, but also save money on your energy 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 Thousand Oaks
The EcoWatch Reviews team examined dozens of installers across the country to find the top window installation companies for our readers. The installers in this article scored the best in our review categories, which include energy-efficient offerings, local expertise, price, availability, 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 Thousand Oaks. This window installation company has been in business since 1995 and currently services 200 locations nationwide.
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 is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so be sure to mention that you want energy-efficient windows to your Window World representative when inquiring about services.
How much does Window World cost in Thousand Oaks?Though pricing information is not readily available on Window World’s website, it's known for offering some of the most affordable window installations around. For more accurate information on the cost, you can receive a 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 is a family-owned and -operated window replacement company, which primarily serves the West Coast. This company has been in business since 1962 and currently provides services to Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties. Many positive reviews on customer review websites back the company's reputation.
Milgard may be the company for you if you want 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 WindowsMilgard Windows & Doors carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality 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 Thousand Oaks?While pricing information is not readily available on Milgard’s website, it offers different kinds of windows at varying price points. For more accurate information on the cost, you can ask for a 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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has been in business since 1995 and currently provides services to nearly every state except Mississippi and West Virginia. Many positive reviews on customer review websites back the company's reputation.
Andersen may be the company for you if you want 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 make sure you 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 Thousand Oaks?While pricing information is not readily available on Andersen’s website, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. For more accurate information on the cost, you can ask for a 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 provider has 20 years of experience in the windows industry, and it has proved to be one of the most respected companies in the business. The company has a lot of glowing reviews from customers online.
It has an industry-leading warranty covering products, parts and workmanship for life.
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 be sure to mention that you want 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 Thousand Oaks?Although pricing information is not readily available on Universal’s website, 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. If you’d like more accurate information, you can inquire about a quote on the company’s website.
We aim to stay unbiased and transparent by mentioning pros and cons for each installer. Additionally, any partnerships do not influence our reviews.
More Window Companies in Thousand Oaks
Renewal by Andersen of Los Angeles
Torrance, 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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Custom Window Designs
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Fast Delivery
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Commercial Windows
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Stained Glass
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Double-Hung
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Window Replacement
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Glass Showers
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Residential Windows
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Sliding Glass
Window World of Los Angeles
Covina, CA-
Price Transparency
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Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Custom Window Designs
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Fast Delivery
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Double-Hung
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Residential Windows
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Window Replacement
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Sliding Glass
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Bay Windows
American Vision Windows
Simi Valley, CA-
Good Customer Service
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Educational Website
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Price Transparency
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Free assessment
Services Offered
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Custom Window Designs
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Energy-Efficient Options
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Double-Hung
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Sliding Glass
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Fast Delivery
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Window Replacement
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Residential Windows
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Glass Showers
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Stained Glass
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Bay Windows
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Aluminum Window Frames
Nu-Star Glass and Mirror
Simi Valley, CA-
Free assessment
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Educational Website
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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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Energy-Efficient Options
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Glass Showers
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Residential Windows
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Sliding Glass
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Window Repair
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Commercial Windows
The Window Factory
Simi Valley, CA-
Price Transparency
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Free assessment
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Educational Website
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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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Energy-Efficient Options
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Commercial Windows
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Double-Hung
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Fast Delivery
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Residential Windows
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Sliding Glass
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Bay Windows
Emergency Glass repair and Board Up
Thousand Oaks, CA-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Window Replacement
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Sliding Glass
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Window Repair
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Commercial Windows
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Glass Showers
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Custom Window Designs
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Fast Delivery
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Residential Windows
My Window Solutions
Newbury Park, CA-
Price Transparency
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Free assessment
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Good Customer Service
Services Offered
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Aluminum Window Frames
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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
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Commercial Windows
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Residential Windows
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Fast Delivery
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Glass Showers
Arrow Glass of Thousand Oaks
Thousand Oaks, 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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Glass Showers
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Sliding Glass
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Window Replacement
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Double-Hung
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Window Repair
Community Glass & Mirror
Simi Valley, CA-
Educational Website
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Price Transparency
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Good Customer Service
Services Offered
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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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Window Replacement
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Commercial Windows
Window Design Group
Thousand Oaks, CA-
Good Customer Service
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Price Transparency
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Free assessment
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Educational Website
Services Offered
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Window Replacement
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Sliding Glass
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Aluminum Window Frames
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Residential Windows
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Energy-Efficient Options
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Double-Hung
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Bay Windows
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Custom Window Designs
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Fast Delivery
Clear Choice USA-Simi Valley
Simi Valley, CA-
Good Customer Service
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Price Transparency
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Educational Website
Services Offered
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Window Replacement
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Residential Windows
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Custom Window Designs
Golden Hands Builders
Woodland Hills, 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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Glass Showers
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Commercial Windows
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Window Replacement
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Fast Delivery
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Residential Windows
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Double-Hung
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Custom Window Designs
Frontier Windows & Doors
Canoga Park, CA-
Free assessment
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Price Transparency
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Timely Service
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Good Customer Service
Services Offered
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Energy-Efficient Options
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Fast Delivery
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Sliding Glass
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Residential Windows
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Window Replacement
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Double-Hung
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Aluminum Window Frames
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Custom Window Designs
California Vision Windows
Canoga Park, CA-
Good Customer Service
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Price Transparency
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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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Aluminum Window Frames
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Window Replacement
Progressive Insulation & Windows
Chatsworth, CA-
Free assessment
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Price Transparency
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Good Customer Service
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Educational Website
Services Offered
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Custom Window Designs
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Residential Windows
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Energy-Efficient Options
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Fast Delivery
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Window Replacement
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Double-Hung
Aggressive Sash & Door
Canoga Park, CA-
Free assessment
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Educational Website
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Timely Service
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Price Transparency
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Good Customer Service
Services Offered
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Double-Hung
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Residential Windows
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Custom Window Designs
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Energy-Efficient Options
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Window Replacement
Frontline Windows & More Inc.
Chatsworth, CA-
Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Residential Windows
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Bay Windows
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Double-Hung
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Window Replacement
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Custom Window Designs
Sivan Windows and Doors - Los Angeles Window and Door Replacement Company
Northridge, 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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Double-Hung
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Sliding Glass
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Aluminum Window Frames
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Commercial Windows
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Residential Windows
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Window Replacement
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Custom Window Designs
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Glass Showers
Fine Windows and Doors, Inc.
Chatsworth, CA-
Educational Website
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Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Energy-Efficient Options
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Custom Window Designs
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Sliding Glass
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Double-Hung
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Window Replacement
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Aluminum Window Frames
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Fast Delivery
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Residential Windows
Quality Windows & Doors
Oxnard, CA-
Educational Website
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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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Glass Showers
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Full-Service Installations
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Residential Windows
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Aluminum Window Frames
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Window Replacement
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Double-Hung
Calculate how much you can expect to pay for window installation and replacement in Thousand Oaks, 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 Thousand Oaks Saves You Money
By switching to energy-efficient windows, you can enjoy several benefits, such as:
- Protect your investment: When your home is on the older side, your windows could also be outdated or drafty. Upgrading your windows is an important part of maintaining your property and its value.
- Reduce your carbon footprint: Because energy-efficient windows improve the insulation in your house, you can cut your carbon footprint by about 12%, according to Energy Star.
- More efficient energy usage in your home: In Thousand Oaks where the winters can be very chilly, energy-efficient windows cut back on the amount of heat that is lost through your windows, which makes it easier to keep your house warm.
- Protect your valuables from fading: When you switch to energy-efficient windows that have low-emissivity coatings, your floors, carpets and furniture will be protected from fading because of their ability to filter out damaging UV rays.
Estimated Cost of Window Replacement in Thousand Oaks
When considering window installation, each company offers different services and costs. Let's look at some typical costs and services.
How Much Do New Windows Cost?
Although the national average to replace a single window is around $600, it can range anywhere from $200 to $1,200. But costs will vary considerably depending on the number of windows you need, the current condition of your home, your location and the quality of your products. A lot of window companies also offer replacement door installations and other add-ons like baths, coating, shutters and more. Additional services will increase overall project costs.
Whether or not you opt for energy-efficient windows is another factor that will determine the cost. These will usually cost more than other windows, but on the other hand, you can save about $572 a year on your energy bills in Thousand Oaks.
Costs will also vary based on the material of your frame. Aluminum frames are the least expensive. They're sturdy, light and maintenance-free, but offer poor insulation. Vinyl frames are a bit more expensive and offer good insulation. Composite frames made from wood fibers encased in plastic also offer good insulation and are moderately expensive. Wood frames are the most expensive and are the most in-demand. They're also aesthetically pleasing and offer decent insulation for your home.
What Services do Window Installers Offer?
There are generally two kinds of window replacement services: full-frame and pocket installations.
A full-frame installation replaces the complete window, including the sill, frame, trim and the window panes. As this type of installation requires more time, it will be more expensive than a pocket installation. Pocket installations are simpler and won't cost as much, as they involve simply replacing the window within its existing frame. But if the frame has any damage, you should opt for a full-frame installation instead.
If you're unsure which type of window installation service you need, your installer can assist you. Generally, the decision depends 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 Thousand Oaks
In our search to find the most reliable, eco-friendly window installers in Thousand Oaks, EcoWatch examined many companies before deciding on these. Along with energy efficiency, we reviewed each installer and ranked them using the following methodology:
Service Area
Because this is a guide for Thousand Oaks, we paid more attention to companies that serve 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 Thousand Oaks.
Work Quality
When picking new windows, the quality and breadth of services can often play just as important of a role in overall efficiency and performance as the brand you opt for. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent customer feedback to determine the companies with the most consistent customer satisfaction. Customer satisfaction may be the most important factor, as it indicates the quality of services across nearly every category, including quality of parts, warranty, cost, quality of installation, professionalism and more.
Cost
Cheaper windows don't necessarily mean better windows, but we know many of our readers want 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
Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies that have 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 been in the industry for quite some time. Window installers that have more experience will earn higher rankings by our standards. We like to see at least ten years of experience.
Thousand Oaks, CA Window Replacement FAQs
How much should window installation cost?
The national average cost of installing one window is about $600 but can range between $200 and $1,200, based on a variety of factors. The price is usually dependent on the type and material of the window, the size of the window and the location of your property. Also, bear in mind that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.
What are the kinds of windows?
The most common kinds of windows for homes are transom windows, picture windows, awning windows, bay windows, slider windows, casement windows and double-hung and single-hung windows.
What do window installers do?
Window installers travel to your property to remove your old windows and replace them with new ones. Some companies install products made by other companies, whereas others are both manufacturers and installation companies combined. The installer will also clean up after the installation.
When is it time to replace your windows?
Windows have a typical lifespan of about 20 to 30 years. If your windows are older than that, they probably need to be replaced. Other than that, if your windows have damage anywhere on them, or they have become difficult to operate, they may need to be replaced.
Should I replace my windows all at once?
If your windows are more than 20 years old, it's probably time to replace all of them. By that point, they are usually less efficient, leakier and/or more damaged than new windows. Doing your windows all at the same time will involve less paperwork and less time.