20 Best Window Companies in Thousand Oaks, CA (2024 Reviews)

Thinking of improving your home’s value? 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:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated May 20, 2024

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

A guide on the top window replacement companies in Thousand Oaks may not seem like the most captivating article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might realize. Drafty windows can make your home uncomfortable in the summer or winter.

Installing energy-efficient windows on your property can help you save money each month on your electricity bills — and you can help the environment as well.

We’ve made this guide on the best installation companies to help you in your research, so you can not only take advantage of brand-new windows, but also save money on your electricity bills.

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
Buy One Window, Get One 40% OFF
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

Best Window Installation & Replacement Companies in Thousand Oaks

The EcoWatch Reviews team assessed dozens of companies that service the Thousand Oaks area to find the top window installation companies by our standards. The providers mentioned in this article scored best in our categories, which include energy-efficient offerings, availability, customer service, price and more.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World has windows expertise in Thousand Oaks. Window World has over 27 years of experience in the industry, and it currently serves 200 locations nationwide. The company has many glowing reviews from customers online.

It has established itself as a company 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 Windows

Window World’s commitment to sustainability shows in its energy-efficient window offerings. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.

How much does Window World cost in Thousand Oaks?

Window World does not detail prices on its website, but it's known for offering some of the most affordable window installations around. The best way to know for sure is to receive a free quote from the company.

Milgard Windows & Doors logo
FAST QUOTE
as little as 30 seconds
Excellent Reputation

Milgard Windows & Doors

★★★★★
BBB Rating: A
Locations: West Coast
Founded: 1962
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Wide network of installers
  • Pros icon Lifetime warranty available
Cons:
  • Pros icon Entails hiring third-party contractors
  • Pros icon Limited additional services

Milgard Windows & Doors has the best local installation in Thousand Oaks. Milgard has over 60 years of experience in the industry, and it currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties. The company has many glowing reviews from customers online.

It has established itself as a company that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience.

Energy Efficiency of Milgard Windows & Doors Windows

Milgard Windows & Doors’s commitment to sustainability shows in its energy-efficient window offerings. 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?

Milgard does not detail prices on its website, but it offers different kinds of windows at varying price points. The best way to know for sure is to receive a free quote from the company.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen has the best availability in Thousand Oaks. Andersen has over 27 years of experience in the industry, and it currently serves nearly every state except Mississippi and West Virginia. The company has many glowing reviews from customers online.

It has established itself as a company 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 Windows

Renewal by Andersen’s commitment to sustainability shows in its energy-efficient window offerings. 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?

Andersen does not detail prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to know for sure is to receive a free quote from the company.

We strive to remain unbiased and transparent by describing pros and cons for each company we review. Additionally, our rankings are not affected by any partnerships.

More Window Companies in Thousand Oaks

Renewal by Andersen of Los Angeles

Torrance, CA
4.6
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Bay Windows
  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Skylights

Website: https://www.renewalbyandersen.com/window-company/088-los-angeles-ca/about-us
Address: 18700 Crenshaw Blvd, Torrance, CA 90504
Phone: (310) 214-2222

American Vision Windows

Simi Valley, CA
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Wood Frames
  • Service icon Bay Windows
  • Service icon Fiberglass Frames
  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options
  • Service icon Glass Doors

Website: https://www.americanvisionwindows.com/locations/los-angeles-ventura-county/
Address: 2125 Madera Rd, Simi Valley, CA 93065
Phone: (805) 864-5452

The Window Factory

Simi Valley, CA
4.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Triple Pane Glass
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options

Website: https://www.thewindowfactory.com/
Address: 1060 E Los Angeles Ave, Simi Valley, CA 93065
Phone: (805) 257-1196

Nu-Star Glass and Mirror

Simi Valley, CA
4.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Repair
  • Service icon Vinyl Frames
  • Service icon Window Repair
  • Service icon Energy-Efficient Options
  • Service icon Glass Doors
  • Service icon Mirrors
  • Service icon Window Replacement/Installation
  • Service icon Glass Showers
  • Service icon Custom Glass

Website: https://nustarglass.com/
Address: 350 E Easy St #12, Simi Valley, CA 93065
Phone: (805) 582-9199

Milgard Windows & Doors

Simi Valley, CA
4.6
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Doors
  • Service icon Metal Frames
  • Service icon Fiberglass Frames
  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows
  • Service icon Double-Hung

Website: http://milgard.com/
Address: 355 E Easy St S, Simi Valley, CA 93065
Phone: (805) 581-6325

Agoura Sash & Door, Inc.

Westlake Village, CA
4.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Skylights
  • Service icon Glass Doors
  • Service icon Fiberglass Frames
  • Service icon Window Replacement/Installation

Website: https://agourasash.com/
Address: 2301 Townsgate Rd, Westlake Village, CA 91361
Phone: (805) 449-2840

Preferred Glass And Windows

Simi Valley, CA
3.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Mirrors
  • Service icon Glass Showers
  • Service icon Glass Doors

Website: http://preferredglassandwindows.com/
Address: 1296 E Los Angeles Ave, Simi Valley, CA 93065
Phone: (805) 495-7976

My Window Solutions

Newbury Park, CA
3.4
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Metal Frames

Website: http://www.mywindowsolutions.com/
Address: 3537 Old Conejo Rd 112 and #117, Newbury Park, CA 91320
Phone: (805) 499-9111

Frontier Windows & Doors

Canoga Park, CA
4.5
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: http://www.frontierwindows.net/
Address: 21426 Sherman Way, Canoga Park, CA 91303
Phone: (818) 478-0074

Oakstone Glass Corporation

Thousand Oaks, CA
3.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Mirrors
  • Service icon Window Replacement/Installation
  • Service icon Glass Showers
  • Service icon Glass Doors

Website: http://www.oakstoneglass.com/
Address: 3330 Thousand Oaks Blvd, Thousand Oaks, CA 91362
Phone: (805) 495-0441

Arrow Glass

Thousand Oaks, CA
3.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Mirrors
  • Service icon Glass Repair
  • Service icon Window Repair
  • Service icon Glass Showers

Website: https://www.customglassthousandoaks.com/
Address: 2540 Thousand Oaks Blvd, Thousand Oaks, CA 91362
Phone: (805) 497-8152

Glass Illusions

Camarillo, CA
3.1
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Doors
  • Service icon Window Repair
  • Service icon Window Replacement/Installation
  • Service icon Glass Showers

Website: https://www.glassillusionsvc.com/
Address: 4811 Calle Alto, Camarillo, CA 93012
Phone: (805) 445-6591

Emergency Glass repair and Board Up

Thousand Oaks, CA
2.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Repair
  • Service icon Window Replacement/Installation
  • Service icon Window Repair
  • Service icon Glass Showers
  • Service icon Glass Doors

Website: https://emergencyglassrepairandboardupservices.com/
Address: 3554 N Avenida Montuoso, Thousand Oaks, CA 91362
Phone: (805) 551-2460

California Deluxe Windows

Chatsworth, CA
4.3
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Double-Hung
  • Service icon Wood Frames
  • Service icon Custom Window Designs
  • Service icon Bay Windows
  • Service icon Vinyl Frames
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: https://cdwindows.com/
Address: 20735 Superior St, Chatsworth, CA 91311
Phone: (747) 277-4866

Westoaks Glass and Mirror, Inc.

Westlake Village, CA
2.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

  • Service icon Mirrors
  • Service icon Skylights
  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Glass Repair
  • Service icon Custom Glass
  • Service icon Tempered Glass

Website: http://westoaksglass.com/
Address: 31210 La Baya Dr, Westlake Village, CA 91362
Phone: (310) 456-1315

Sivan Windows and Doors - Los Angeles Window and Door Replacement Company

Northridge, CA
4.4
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Metal Frames
  • Service icon Glass Doors
  • Service icon Custom Window Designs
  • Service icon Window Replacement/Installation

Website: https://www.sivanwindowsanddoors.com/
Address: 19865 Nordhoff St, Northridge, CA 91324
Phone: (800) 559-9150

Clear Choice USA-Simi Valley

Simi Valley, CA
2.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Custom Window Designs
  • Service icon Glass Doors
  • Service icon Energy-Efficient Options

Website: http://clearchoicewindowsusa.com/
Address: 67 W Easy St # 132, Simi Valley, CA 93065
Phone: (805) 583-5992

SoCal Energy Contractors, Inc.

Northridge, CA
4.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options

Website: http://www.socalenergyinc.com/
Address: 8345 Reseda Blvd #204, Northridge, CA 91324
Phone: (833) 929-1440

Valley Doors Group

Woodland Hills, CA
3.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: http://valleydoorsgroup.com/
Address: 22530 Ventura Blvd, Woodland Hills, CA 91364
Phone: (818) 613-2336

CGH Solutions - California Green Home Solutions

Van Nuys, CA
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Vinyl Frames
  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: https://cghsolutions.com/
Address: 7020 Hayvenhurst Ave suite b, Van Nuys, CA 91406
Phone: (562) 644-5530
Thousand Oaks Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Thousand Oaks, CA using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

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 upgrading to energy-efficient windows, you can enjoy several benefits, such as:

  • Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
  • Decrease your carbon footprint: In Thousand Oaks, you can lower your indirect greenhouse gas emissions by about 117 pounds per year after you upgrade to energy-efficient windows.
  • Save money on electricity bills: The Department of Energy estimates that heat gained or lost through windows makes up around 25-30% of residential energy use. Upgrading to energy-efficient windows can help lower that number, which helps you save some money on your bills.
  • Protect your investment: Upgrading and repairing your windows is an important part of maintaining your property and its real estate value, particularly if your home is on the older side.

Estimated Cost of Window Replacement in Thousand Oaks

Let’s take a look at the cost of replacing your windows and the types of services offered by installers.

How Much Do New Windows Cost?

According to our research, the average cost of replacing a single window is about $600. However, window replacement costs can range from $200 to $1,200 a window. But prices differ remarkably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also provide door replacements, which will add extra costs to your project.

It’s important to bear in mind that windows with the best efficiency may cost more initially but can save you hundreds of dollars via returns on your energy bills. Investing in Energy Star certified windows can save Thousand Oaks homeowners $572+ a year when replacing single-pane windows.

We advise requesting free quotes from multiple window installers to find the right windows and the company that works best for you.

What Services do Window Installers Offer?

The first step of a window installation is to clarify whether you need a full-frame or pocket installation.

Full-frame installations are usually recommended when you want to change the style of your windows or your window has significant deterioration. With this service, your installers will replace the entire window, including the trim, frame and sill. Pocket installations (also known as retrofits) are when you replace a window while leaving the existing frame. Pocket installations are simpler and won’t carry as large a bill, but you can’t do this type of installment if you have any pre-existing rot or water damage.

If you’re not sure which type of window installation service you should get, your installer should be able to advise you. In general, the choice is influenced by factors like the age and condition of the home, the type of building material, budget and time restrictions.

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
Buy One Window, Get One 40% OFF
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

How We Choose the Best Window Installers in Thousand Oaks

In our search to make your home improvements easier and more eco-friendly in Thousand Oaks, the EcoWatch team assessed many companies before deciding on these. We’ve assessed the best window replacement companies in Thousand Oaks mainly based on their energy efficient offerings, as it’s the most sustainable option and the best one for homeowners. Energy Star certified windows can reduce your electricity 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 best window installation company near you.

Work Quality

We’re willing to bet that you’re not looking for a company to do a shoddy job installing windows. We’ve vetted each installer featured in our guide to make sure its contractors are well-qualified and that the company has received tons of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed patterns in recent customer feedback to determine the companies with the most consistent customer satisfaction, weighted by sample size. Customer satisfaction may 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 installation, quality of parts 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 awarded higher points to companies with reasonable prices and accessible financing rather than “cheaper” services.

Warranty

Protecting your investment in new windows is important. For that reason, window installation companies that offer lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Because of Thousand Oaks’s climate, homeowners will want to mitigate low efficiency, water damage and rot. We factored in local experience to reflect the ability of Thousand Oaks window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.

Thousand Oaks, CA Window Replacement FAQs

What is the typical cost to replace windows in a home?

The average cost of installing a single window can range between $450 and $650. There are a variety of factors that influence the price, which include how energy-efficient the windows are, the materials used in designing the windows, your property’s location, the number of windows, local labor costs and styles and sizes of windows.

What are the different kinds of windows?

The most common types of windows for homes include: awning windows, double-hung and single-hung windows, slider windows, transom windows, bay windows, casement windows and picture windows.

What services do window installation companies provide?

Window installation professionals will do the entire process — from replacing your old windows with new ones to cleaning up after the installation. In addition, some companies offer window manufacturing, customization and repairs.

How long does it usually take to install windows?

Each window takes about 30 minutes to install based on the kind of window. However, the window installation can take two days or more if you need to have a lot of windows installed.