20 Best Window Companies in Westminster, CA (2025 Reviews)
Thinking about improving your home’s insulation? The top window replacement companies can help.
We analyzed all the top-rated window companies in Westminster and selected the best 20 based on:
Customer reviews
Window installation expertise
Popularity with home-owners like you
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Why you can trust EcoWatch
Although renewable energy sources like wind and solar are important when it comes to reducing your carbon footprint, improving your home’s efficiency can also have a large impact on home energy conservation. Drafty or leaky windows can make your AC or heater work extra hard in the summer or winter.
Installing upgraded, efficient windows on your property can help you save money each month on your electric bills — and you can help the environment, too.
We’ve put together this guide on the top installation companies to help you in your search, so you can not only benefit from brand-new windows, but also save money on your electricity bills.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Window Installation & Replacement Companies in Westminster
The EcoWatch Reviews team examined dozens of installers in Westminster to find the top ones for our readers. The providers in this article scored best in our review categories, such as energy-efficient offerings, customer service, price, local expertise, availability and more.

Window World
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
Quality of service will depend on your area
Window World has windows expertise in Westminster. This provider has 27 years of experience in the window installation industry, and it has become one of the most reputable companies in Westminster.
Window World may be the company for you if you want 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 WindowsIts 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 offerings are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in Westminster?Prices aren’t available on Window World’s website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate information is to get a free quote from the company.

Milgard Windows & Doors
EnergyStar Partner
Wide network of installers
Lifetime warranty available
Entails hiring third-party contractors
Limited additional services
Milgard Windows & Doors has the best local installation in Westminster. This provider has 60 years of experience in the window installation industry, and it has become one of the most reputable companies in Westminster.
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 WindowsThe 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 offerings are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Milgard Windows & Doors cost in Westminster?Prices aren’t available on Milgard’s website, but it offers different kinds of windows at varying price points. The best way to get more accurate information is to get a free quote from the company.

Renewal by Andersen
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
More expensive than competition
Renewal by Andersen has the best availability in Westminster. This provider has 27 years of experience in the window installation industry, and it has become one of the most reputable companies in Westminster.
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 WindowsA 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 offerings are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Westminster?Prices aren’t available on Andersen’s website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to get more accurate information is to get a free quote from the company.
We’ve recommended providers 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 describing pros and cons for each company reviewed.
More Window Companies in Westminster
Renewal by Andersen of Orange County
Laguna Hills, CAFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Bay Windows
Window Replacement/Installation
Double-Hung
Glass Doors
Harbor Construction
Huntington Beach, CAPrice Transparency
Educational Website
Free assessment
Timely Service
Good Customer Service
Services Offered
Energy-Efficient Options
Glass Doors
Bay Windows
Vinyl Frames
Window Replacement/Installation
Double-Hung
Hometime Windows & Doors
Santa Ana, CAPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
California Window & Solar
Costa Mesa, CAGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Vinyl Frames
Energy-Efficient Options
Metal Frames
Dede Windows and Doors / window replacement
Anaheim, CAPrice Transparency
Educational Website
American-made vinyl
Good Customer Service
Educational website
Energy-efficient windows and doors
Free assessment
Services Offered
Vinyl Frames
Custom Window Designs
Window Replacement/Installation
Glass Doors
Smart Window Company
Torrance, CAPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Double-Hung
Vinyl Frames
Window Replacement/Installation
Tempered Glass
Energy-Efficient Options
Glass Doors
Mancino Door & Window, Inc.
Laguna Niguel, CAFree assessment
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Discount Window And Door
Redondo Beach, CAPrice Transparency
Good Customer Service
Free assessment
Services Offered
Glass Doors
Metal Frames
Skylights
Energy-Efficient Options
Window Replacement/Installation
Vinyl Frames
SoCal Window Pros
San Dimas, CAGood Customer Service
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Andes windows & doors
Norco, CAEducational Website
Price Transparency
Offers window treatments
Online portfolio
Spanish-speaking
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Bay Windows
Double-Hung
Vinyl Frames
Retro Windows and Patio Doors LLC
Fontana, CAEducational Website
Energy-efficient windows and doors
Price Transparency
Free assessment
Family-owned and operated
Good Customer Service
Lifetime warranty
Services Offered
Energy-Efficient Options
Glass Doors
Window Replacement/Installation
Tempered Glass
United Builders Windows & Doors
Rancho Cucamonga, CAEducational Website
Timely Service
Good Customer Service
Free assessment
Price Transparency
Services Offered
Energy-Efficient Options
Bay Windows
Window Replacement/Installation
Glass Doors
Double-Hung
Save-On Glass & Screen
Westminster, CAFree assessment
Timely Service
Good Customer Service
Services Offered
Glass Doors
Window Repair
Window Replacement/Installation
Glass Showers
Mirrors
Window King
Huntington Beach, CAPrice Transparency
Educational Website
Free assessment
Services Offered
Double-Hung
Window Replacement/Installation
Glass Doors
Vinyl Frames
Energy-Efficient Options
Best Windows and Doors OC
Anaheim, CAFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Vinyl Frames
Custom Window Designs
Glass Doors
Window Replacement/Installation
Can-Do Windows & Doors
Santa Ana, CAFree assessment
Price Transparency
Educational Website
Services Offered
Metal Frames
Wood Frames
Window Replacement/Installation
Glass Doors
Double-Hung
Vinyl Frames
Energy-Efficient Options
Fiberglass Frames
TMC Windows & Doors
Orange, CAPrice Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Energy Core Construction
Anaheim, CAGood Customer Service
Timely Service
Educational Website
Free assessment
Price Transparency
Services Offered
Bay Windows
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Golden Age Builders
West Hollywood, CAPrice Transparency
Free assessment
In-home consultations
Unique window options
3D design and planning tool
Timely Service
Good Customer Service
Services Offered
Window Replacement/Installation
Ameristar Windows
Riverside, CAGood Customer Service
Price Transparency
Free assessment
Services Offered
Glass Doors
Vinyl Frames
Energy-Efficient Options
Window Replacement/Installation
Glass Showers
Calculate how much you can expect to pay for window installation and replacement in Westminster, 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 Westminster Saves You Money
By switching to energy-efficient windows, you and your family can benefit in several ways, including:
- Decrease your carbon footprint: Since energy-efficient windows improve the insulation in your home, you can reduce your carbon footprint by about 12%, according to Energy Star.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only insulate your home better, but also filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
- Protect your investment: The older your home is, the more likely it is that switching to energy-efficient windows will benefit you. Older homes usually have windows that are outdated, drafty or potentially even damaged in some way. Upgrading your windows could help increase the value of your property if you decide to sell.
- Save money on power bills: Since energy-efficient windows lower the amount of energy used to heat or cool your home, the switch can help you save around $388 annually on your energy bills in Westminster.
Estimated Cost of Window Replacement in Westminster
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?
On average, Westminster homeowners can expect their replacement window installations to range from $250 to $1,200. The most common installations sit at approximately $600. These amounts are based on specific characteristics of your installation, including material, number of windows, type, size, the location of your home and more.
It’s also worth keeping in mind that energy-efficient windows will almost always cost more initially, but Energy Star estimates that switching out the windows on your Westminster home translates to an average energy savings of $236 to $319 each year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. The amount of money you’ll save by upgrading to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
The cost of your window installation will also vary depending on the kind of window material you choose for the frames. Wood windows are generally the most expensive, although it depends on whether they are completely wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are more efficient.
What Services do Window Installers Offer?
Generally, there are two types of window installation services you can get: full-frame and pocket installations.
A full-frame installation is a total window replacement. This service involves removing the old window, the windowsill, and the exterior and interior trim. It also involves extra materials, including insulation and drip edges, which raise the total cost of the project. Also worth noting: you may have to touch up the paint surrounding the window after a full-frame installation. A pocket installation entails replacing a window within the frame that’s already there. So, instead of tearing out the whole window and reinstalling it, the window installer will just slide the replacement window (also called a retrofit or insert window) into the frame.
If you’re still trying to decide which kind of installation you should get, you can ask your installer and get their advice. The decision mostly is influenced by how old the frames are and if there’s any damage present.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
How We Choose the Best Window Installers in Westminster
In our search to find the most reliable, eco-friendly window installers in Westminster, EcoWatch assessed dozens of companies before settling on these. We have assessed the best window replacement companies in Westminster mainly based on energy efficiency, as it’s the most sustainable option and the best one for homeowners. Energy Star certified windows can cut your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
Because this is a guide for Westminster, we gave more points 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 Westminster.
Work Quality
When choosing 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 of window 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 patterns in recent online reviews to determine the companies with the highest rates of customer satisfaction. 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 as low as possible. When analyzing providers’ prices, 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 to many homeowners. That’s why window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Because of Westminster’s climate, homeowners will want to mitigate water damage, rot and low efficiency. We factored in local experience to reflect the ability of Westminster window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Westminster, CA Window Replacement FAQs
How much does a window install cost?
The typical cost of installing a single window can range between $450 and $650. There are a variety of factors that affect the price, including your property’s location, the number of windows, styles and sizes of windows, the materials used in designing the windows, local labor costs and how energy-efficient the windows are.
What are the most common kinds of replacement windows?
The most common kinds of windows for homes include: awning windows, double-hung and single-hung windows, slider windows, bay windows, casement windows, transom windows and picture windows.
What do window installers do?
Window installation professionals travel to your house to remove your old windows and replace them with new ones. Some companies install products manufactured by other companies, whereas others install their own windows. The installer will also clean up after the installation is complete.
How long does window installation usually take?
Each window takes about 30 minutes to install based on the type of window. However, the window installation can be a two-day job — or more — if you have a lot of windows that need to be installed.