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Best Window Replacement Companies in Thousand Oaks, CA

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  1. Home
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  3. Window Replacement
  4. CA
  5. Thousand Oaks
Written By Max Peterson|Last Updated: February 05, 2024

Replacement windows can shield your home from leaks and drafts, increase its energy efficiency, and provide it with some additional aesthetic appeal. Local installers recognize that homeowners would prefer not to pay a high price for window replacement in Thousand Oaks. They work with affordable materials that don't compromise on durability.

Top Pick
  • Full-service installation
  • Large window selection
  • Nearly 30 years of experience
Best Financing
  • Full-service installation
  • In-house, U.S.-made products
  • More than 70 years of experience
Most Customizable
  • Full-service remodeling
  • 96% satisfaction rate
  • More than 30 years of experience

Top 10 Thousand Oaks Window Installation Companies

We've put together this list of contractors that specialize in window replacement in Thousand Oaks.

Thousand Oaks residents can trust the This Old House Reviews Team to provide timely, up-to-date window installer recommendations. To discover the best providers, we emphasize these five elements:

  • Customer reviews and recommendations
  • Energy-efficiency guarantees
  • Services and warranties
  • Product quality
  • Professional experience and licensure
Window World of Los Angeles Logo

Window World of Los Angeles

Based on 31 customer reviews.

Services Offered

Glass DoorsBay WindowsVinyl FramesDouble-HungWindow Replacement/installation


  • Price transparency
  • Good customer service
  • Free assessment
718 Arrow Grand Cir, Covina, CA 310-564-7299 windowworldla.com
American Vision Windows Logo

American Vision Windows

Based on 1,250 customer reviews.

Services Offered

Fiberglass FramesEnergy-Efficient OptionsBay WindowsWood FramesVinyl FramesWindow Replacement/installationGlass DoorsDouble-Hung


  • Free assessment
  • Price transparency
  • Good customer service
2125 Madera Rd, Simi Valley, CA 805-864-5452 americanvisionwindows.com
Milgard Windows & Doors Logo

Milgard Windows & Doors

Based on 852 customer reviews.

Services Offered

Energy-Efficient OptionsMetal FramesGlass DoorsBay WindowsWindow Replacement/installationDouble-HungFiberglass Frames


  • Timely service
  • Educational website
  • Price transparency
355 E Easy St S, Simi Valley, CA 805-581-6325 milgard.com
My Window Solutions Logo

My Window Solutions

Based on 22 customer reviews.

Services Offered

Window Replacement/installationMetal FramesDouble-HungGlass Doors


  • Free assessment
  • Price transparency
  • Good customer service
3537 Old Conejo Rd 112 And #117, Newbury Park, CA 805-499-9111 mywindowsolutions.com
The Window Factory Logo

The Window Factory

Based on 30 customer reviews.

Services Offered

Energy-Efficient OptionsDouble-HungGlass DoorsBay WindowsWindow Replacement/installationVinyl FramesTriple Pane Glass


  • Good customer service
  • Price transparency
  • Free assessment
1060 E Los Angeles Ave, Simi Valley, CA 805-257-1196 thewindowfactory.com
Nu-Star Glass and Mirror Logo

Nu-Star Glass and Mirror

Based on 37 customer reviews.

Services Offered

Energy-Efficient OptionsGlass RepairWindow RepairCustom GlassGlass ShowersGlass DoorsMirrorsVinyl FramesWindow Replacement/installation


  • Free assessment
  • Good customer service
  • Price transparency
350 E Easy St #12, Simi Valley, CA 805-582-9199 nustarglass.com
Arrow Glass Logo

Arrow Glass

Based on 15 customer reviews.

Services Offered

Glass RepairGlass ShowersWindow Replacement/installationWindow RepairMirrors


  • Good customer service
  • Free assessment
  • Price transparency
2540 Thousand Oaks Blvd, Thousand Oaks, CA 805-497-8152 customglassthousandoaks.com
Agoura Sash & Door, Inc. Logo

Agoura Sash & Door

Based on 42 customer reviews.

Services Offered

Window Replacement/installationGlass DoorsSkylightsFiberglass Frames


  • Educational website
  • Good customer service
  • Free assessment
2301 Townsgate Rd, Westlake Village, CA 805-449-2840 agourasash.com
Oakstone Glass Corporation Logo

Oakstone Glass Corporation

Based on 27 customer reviews.

Services Offered

Window Replacement/installationGlass DoorsMirrorsGlass Showers


  • Good customer service
  • Educational website
3330 Thousand Oaks Blvd, Thousand Oaks, CA 805-495-0441 oakstoneglass.com

More Local Window Companies

Preferred Glass And Windows

User Reviews: 3.9/5 

1296 E Los Angeles Ave
Simi Valley, CA 93065

Frontier Windows & Doors

User Reviews: 4.5/5 

21426 Sherman Way
Canoga Park, CA 91303

Valley Doors Group

User Reviews: 4.1/5 

22530 Ventura Blvd
Woodland Hills, CA 91364

Progressive Insulation & Windows

User Reviews: 4.2/5 

9750 CA-27
Chatsworth, CA 91311

California Deluxe Windows

User Reviews: 4.5/5 

20735 Superior St
Chatsworth, CA 91311

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

User Reviews: 4.5/5 

19865 Nordhoff St
Northridge, CA 91324

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

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Facts about Thousand Oaks
Annual Energy Efficient Windows Savings:$572
Average Max Temp:71°F
Average Min Temp:50°F
Average Daily Sunlight:72%
Average Annual Snowfall:0"
Average Monthly Precipitation:1.62"

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

How To Choose a Window Company in Thousand Oaks

With Thousand Oaks' sheer size, you're sure to find a dependable window company in line with your values and preferences. As you make calls, keep the following factors in mind:

Window Cost by Type

Replacing your windows is a substantial expense, so balancing cost with performance is important. Choosing cheap windows could actually increase your overall cost, since they come with a shorter lifespan and more intensive maintenance needs. The age of your home, as well as the sizes, styles, and materials of windows you select, can impact pricing. Simple double-hung windows deliver great value with their straightforward style and simple mechanisms, while a custom-cut arch window in a master suite will cost more. It's advisable to consult a trusted installer to figure out your ideal options.

To help you form a rough estimate, this table shows the typical cost of the most common residential window types.

Window TypesAverage Cost
Glass Block$44-$567

Window Material Cost

Materials also help determine a window's cost. You might pick a material based on your desired look, the local climate, and your energy efficiency goals. For example, wood windows can give your home an organic design without breaking the bank, but you'll have to invest more toward maintenance. Aluminum and composite windows cost more up-front, but they're incredibly durable against the elements, so you'll spend far less on maintenance.

Window TypesAverage Cost

Other Window Replacement Costs

Your total cost for window replacement will also include warranty fees (if applicable), permit-related costs (if required), and labor. Be sure to discuss each of these factors with a sales representative before committing to a window company.

Experience and Training

Examine a company's website and talk to a representative to learn more about its product and service offerings, pricing, and warranties. Many companies also keep online portfolios that exhibit past projects.

Ensure that the company focuses on window replacement. The more specific training its staff has, and the longer it has been in business, the more likely it will deliver top-notch craftsmanship.

Licensing and Credentials

A California window company must be licensed as a General Building Contractor, Glazing Contractor and Window Coverings Contractor if it handles jobs valued at over $500. Each certification has its own exam and work requirements. If a contractor is caught working without a license, they'll have to pay hefty penalties.

Types of Windows Offered

There are several replacement window types you can choose from, and it's important to find a company that focuses on installing the ones you want. Browse a company's website and reviews for any of these types:

  • Awning
  • Bay
  • Bow
  • Casement
  • Crank-out
  • Custom
  • Double- or single-hung
  • Egress
  • Garden
  • Jalousie
  • Picture
  • Sliding
  • Skylight
  • Specialty
  • Storm
  • Transom
  • Vent
Also, check the style of window framing materials a company works with. Each material has different price points, life spans, and energy performance capabilities. Common materials include aluminum, composite, fiberglass, wood and vinyl.

Customer Feedback

Reading other customers' stories is one of the smartest ways to screen different window replacement companies. You can find customer reviews on websites like Google, Yelp, the BBB, and Trustpilot. Referrals can also help you in your company search. Ask each company you're interested in for a list of references, and talk to family and friends about who they use for window installations.

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Frequently Asked Questions About Window Replacement in Thousand Oaks

What are the benefits of hiring a window installer?

Window replacement is a significant investment that greatly impacts your home's comfort and energy performance. Hiring a reputable window contractor to supervise your project ensures your windows will be properly installed, perform optimally, and be properly sealed. Companies also typically include a warranty that takes care of required maintenance and most future repairs.

Does window replacement involve pulling permits?

Whether you need a building permit to replace your windows will depend on your local building codes and regulations. Some cities require permits for window replacement projects, especially those that involve structural changes or alterations to the window openings. Generally speaking, it is a good idea to check with your local building department or contact a professional before proceeding with any window replacement work.

Can I replace just my windows' glass and not their frames?

If you broke your window's glass, you might not need to replace the whole thing. Usually, you can simply change the shattered glass panel without having to change the entire window unit. However, it's best to consult a window repair expert to assess the right solution for your specific situation.

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

More Window Resources

National Windows Company Ranking Methodology


Energy Star