20 Best Window Companies in Simi Valley, CA (2024 Reviews)

Thinking about upgrading your home's windows? We’ve got all the information you need in this guide to the best window installation companies.

We analyzed all the top-rated window companies in Simi Valley 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 June 24, 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 best window replacement companies in Simi Valley may not seem like the most captivating article on EcoWatch, but trust us, windows have a more direct impact on your life than you might realize. If your windows are drafty or damaged, you could be sending 25-30% of your home’s heat or cool air out of them.

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

Efficient windows are particularly important in Simi Valley, where summers are long and hot. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $572 per year.

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Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
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 Simi Valley

The EcoWatch team evaluated dozens of installers in Simi Valley to find the top window companies for our readers. We assessed the companies on their energy-efficient offerings, price, coverage area, customer service, local experience and more.

Window World logo
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 is the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has around 27 years of experience in the window replacement industry.

You may want to consider going with Window World if you're looking for 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

Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.

How much does Window World cost in Simi Valley?

Prices are not available on Window World’s website, as the cost of window replacement depends on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. Receiving a free quote on its website is the best way to get more accurate pricing information.

Milgard Windows & Doors logo
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 is a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has around 60 years of experience in the window replacement industry.

You may want to consider going with Milgard if you're looking for 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

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. Not all of Milgard’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.

How much does Milgard Windows & Doors cost in Simi Valley?

Prices are not available on Milgard’s website, as the cost of window replacement depends on how many and what type(s) of windows you need. However, it offers different kinds of windows at varying price points. Receiving a free quote on its website is the best way to get more accurate pricing information.

Renewal by Andersen logo
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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window replacement industry.

You may want to consider going with Andersen if you're looking for 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

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. Not all of Andersen’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.

How much does Renewal by Andersen cost in Simi Valley?

Prices are not available on Andersen’s website, as the cost of window replacement depends on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. Receiving a free quote on its website is the best way to get more accurate pricing information.

We’ve recommended companies with good reputations, but note that these are national companies, so your service may depend on your local crew. We have tried to stay unbiased and transparent by including pros and cons for every company reviewed.

More Window Companies in Simi Valley

Renewal by Andersen of Los Angeles

Torrance, CA
4.7
★★★★★
  • Pros icon 31,000+ projects completed
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Financing options available
  • Pros icon In-home or virtual consultations
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

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 Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Vinyl Frames
  • Service icon Fiberglass Frames
  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Wood Frames
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • 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
4.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

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

Milgard Windows & Doors

Simi Valley, CA
4.7
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Good Customer Service

Services Offered

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

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

Nu-Star Glass and Mirror

Simi Valley, CA
4.5
★★★★★
  • Pros icon Good Customer Service

Services Offered

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

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

Westoaks Glass and Mirror, Inc.

Westlake Village, CA
4.5
★★★★★
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

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

Progressive Insulation & Windows

Chatsworth, CA
4.5
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

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

Website: http://www.progressiveiw.com/
Address: 9750 CA-27, Chatsworth, CA 91311
Phone: (800) 500-6200

Agoura Sash & Door, Inc.

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

Services Offered

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

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

Frontier Windows & Doors

Canoga Park, CA
4.4
★★★★★
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

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

California Deluxe Windows

Chatsworth, CA
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

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

Preferred Glass And Windows

Simi Valley, CA
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

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

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

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

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

Services Offered

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

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

Valley Doors Group

Woodland Hills, CA
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

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

Concierge Home Remodeling

Tarzana, CA
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: https://conciergehomeremodeling.com/
Address: 19562 Ventura Blvd #226, Tarzana, CA 91356
Phone: (213) 466-1344

SoCal Energy Contractors, Inc.

Northridge, CA
4.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

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

Oakstone Glass Corporation

Thousand Oaks, CA
3.2
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

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

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

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 Metal Frames
  • Service icon Double-Hung

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

Clear Choice USA-Simi Valley

Simi Valley, CA
3.1
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

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

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

Arrow Glass

Thousand Oaks, CA
3.1
★★★★★
  • Pros icon Free assessment

Services Offered

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

Emergency Glass repair and Board Up

Thousand Oaks, CA
2.9
★★★★★
  • Pros icon Good Customer Service

Services Offered

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

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

Calculate how much you can expect to pay for window installation and replacement in Simi Valley, 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 Simi Valley Saves You Money

By switching to energy-efficient windows, you can take advantage of several benefits, including:

  • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
  • Reduce your carbon footprint: By using less energy after you switch to energy-efficient windows, you’ll also be reducing your carbon dioxide emissions by about 12%, according to Energy Star.
  • Protect your investment: Upgrading your windows is an important part of maintaining your property and its value, especially if you have an older home.
  • Save on power bills: Installing energy-efficient windows reduces your energy bills by about 12% because you use less energy.

Estimated Cost of Window Replacement in Simi Valley

Each window installer provides varying services and has varying prices depending on a few factors.

How Much Do New Windows Cost?

Generally, homeowners in Simi Valley can anticipate that most replacement window installations will cost between $250 and $1,200, with the most common installations sitting at around $600. This is because the cost of window installations are based on a variety of factors specific to your home, such as the size, material and number of windows you need to replace, as well as the location of your property.

It’s also worth keeping in mind that energy-efficient windows will usually cost more initially, but Energy Star estimates that upgrading the windows on your Simi Valley home can mean an average energy savings of $236 to $319 a year for single-pane window replacement, or between $87 to $126 a year for double-pane windows. The amount of money you’ll save by switching to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.

Another factor that affects the total cost is the material of the frame you choose. Aluminum frames are typically the least expensive and are sturdy and light, but they offer poor insulation. On the other hand, wood frames are the most expensive because they are aesthetically pleasing and offer decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.

What Services do Window Installers Offer?

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

Full-frame installations require replacing the full window — the sill, frame, trim and all. These are most common when you want to change the style of your window or when it has a great amount of damage. Full-frame installations require more time and labor and will increase overall costs. Pocket installations (or retrofits) involve replacing a window within the existing frame, which makes pocket installations more simple and affordable. However, if the frame has any damage or rot, you will likely need a full-frame installation instead.

Your window installer should be able to help you choose which type of installation you need.

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Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
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 Simi Valley

EcoWatch reviews are different from other reviews because we examine these companies through a sustainability lens. We’ve evaluated the top window installation companies in Simi Valley primarily based on energy efficiency, as it’s the most sustainable option and the best one for homeowners. Energy Star certified windows can lower energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology considers the following factors:

Service Area

Because this is a guide for Simi Valley, we paid more attention to companies that serve the city. There are certainly other reputable providers that didn’t make our list because they wouldn’t be able to serve homeowners in Simi Valley.

Work Quality

We’re certain that you’re looking for professionals who do a great job installing windows. We’ve vetted each company included on this list to ensure its contractors are well-qualified and that the company has received lots 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 consistent customer satisfaction, weighted by sample size. Customer satisfaction may be the most important factor, as it reflects the quality of services across nearly every category, including quality of installation, warranty, professionalism, quality of parts, cost and more.

Cost

This one is a give-and-take: similar to other services, cheap window installation companies are not going to provide the highest quality service. On the other hand, we want to make sure we’re highlighting companies that provide a spectrum of price and financing options so they’re accessible to most homeowners.

Warranty

Protecting your investment in new windows is important. That’s why window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

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

Simi Valley, CA Window Replacement FAQs

What is the average cost to install windows in a home?

The national average cost of replacing a single window is around $600 but can range from $200 to $1,200, depending on a few different factors. The price is often influenced by the type and material of the window, the location of your property and the size of the window. Also, bear in mind that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.

What type of window is the best for energy efficiency?

Generally, double-pane windows will be more efficient than single-pane windows and windows that do not open are more efficient than windows that do. If you want to be sure you’re getting the most energy-efficient windows, look for models that have the blue Energy Star certification attached to them — this means they’re certified energy-efficient by the U.S. Department of Energy.

What do window installers do?

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

When is the best time of year to replace windows?

Replacement windows can be installed any time of the year, but autumn might be the best season. No matter when you install them, the contractors will take steps to ensure that too much hot or cold air doesn’t get into the home, so the temperature outside isn’t necessarily a big factor. What’s most important is that the weather should be dry.

Should I replace all my windows at once?

If you’re upgrading your windows because of energy-efficiency, replacing all of the windows at once is the only way to gain that benefit. However, if you have only one or two windows that are broken or drafty, you can replace just those.