20 Best Window Companies in Rancho Santa Margarita, CA (2025 Reviews)
Are you looking to upgrade your windows? Our list of the best window installation companies can help you choose the right one for you.
We analyzed all the top-rated window companies in Rancho Santa Margarita 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 decreasing your carbon footprint, improving your house’s energy efficiency can also have a considerable impact on home energy conservation. If your house has outdated, drafty windows, your HVAC system could be working overtime to heat or cool your house. This means spending more on energy bills.
Installing efficient windows on your property can help you save money each month on your electricity bills — and you can help the environment, too.
As windows are so important for your home, choosing the best company for you is a big choice to make. That’s why the EcoWatch team has made this list of the best window replacement companies, so you can make an informed decision more easily.
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 Rancho Santa Margarita
The EcoWatch Reviews team evaluated dozens of providers that service the Rancho Santa Margarita area to find the top window installation companies by our standards. The companies in this article passed our review standards for energy-efficient offerings as well as price, local expertise, customer service and beyond.

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 provides windows expertise in Rancho Santa Margarita. Window World has been in the window business for about 27 years.
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 WindowsThere are a wide range of window types that Window World offers, some of which are Energy Star products. 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 Rancho Santa Margarita?Prices are not available on Window World’s website because the cost of window installment varies greatly depending 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. The best way to know for sure is to ask for 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 provides the best local installation in Rancho Santa Margarita. Milgard has been in the window business for about 60 years.
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 WindowsThere are a wide range of window types that Milgard Windows & Doors offers, some of which are Energy Star products. 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 Rancho Santa Margarita?Prices are not available on Milgard’s website because the cost of window installment varies greatly depending on how many and what type(s) of windows you need. However, it offers different kinds of windows at varying price points. The best way to know for sure is to ask for 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 provides the best availability in Rancho Santa Margarita. Andersen has been in the window business for about 27 years.
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 WindowsThere are a wide range of window types that Renewal by Andersen offers, some of which are Energy Star products. 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 Rancho Santa Margarita?Prices are not available on Andersen’s website because the cost of window installment varies greatly depending 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. The best way to know for sure is to ask for a free quote from the company.
We strive to remain unbiased and transparent by describing pros and cons for each provider. Additionally, any partnerships do not influence our reviews.
More Window Companies in Rancho Santa Margarita
Renewal by Andersen of Orange County
Laguna Hills, CAFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Glass Doors
Window Replacement/Installation
Double-Hung
Bay Windows
Mancino Door & Window, Inc.
Laguna Niguel, CAPrice Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Hometime Windows & Doors
Santa Ana, CAEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Energy-Efficient Options
California Window & Solar
Costa Mesa, CAFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Glass Doors
Energy-Efficient Options
Metal Frames
Window Replacement/Installation
Vinyl Frames
Andes windows & doors
Norco, CAFree assessment
Spanish-speaking
Price Transparency
Offers window treatments
Educational Website
Online portfolio
Good Customer Service
Services Offered
Double-Hung
Vinyl Frames
Window Replacement/Installation
Bay Windows
Glass Doors
Dede Windows and Doors / window replacement
Anaheim, CAGood Customer Service
Free assessment
Energy-efficient windows and doors
American-made vinyl
Educational website
Educational Website
Price Transparency
Services Offered
Vinyl Frames
Custom Window Designs
Glass Doors
Window Replacement/Installation
Harbor Construction
Huntington Beach, CAFree assessment
Good Customer Service
Timely Service
Educational Website
Price Transparency
Services Offered
Bay Windows
Double-Hung
Glass Doors
Energy-Efficient Options
Vinyl Frames
Window Replacement/Installation
Retro Windows and Patio Doors LLC
Fontana, CAEducational Website
Family-owned and operated
Price Transparency
Free assessment
Energy-efficient windows and doors
Good Customer Service
Lifetime warranty
Services Offered
Window Replacement/Installation
Glass Doors
Tempered Glass
Energy-Efficient Options
SoCal Window Pros
San Dimas, CAGood Customer Service
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
United Builders Windows & Doors
Rancho Cucamonga, CAEducational Website
Good Customer Service
Timely Service
Free assessment
Price Transparency
Services Offered
Energy-Efficient Options
Glass Doors
Bay Windows
Double-Hung
Window Replacement/Installation
Smart Window Company
Torrance, CAEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Double-Hung
Vinyl Frames
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Tempered Glass
360 Windows and Doors
Escondido, CATimely Service
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Can-Do Windows & Doors
Santa Ana, CAFree assessment
Price Transparency
Educational Website
Services Offered
Metal Frames
Double-Hung
Window Replacement/Installation
Vinyl Frames
Energy-Efficient Options
Glass Doors
Wood Frames
Fiberglass Frames
TMC Windows & Doors
Orange, CAPrice Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Energy Core Construction
Anaheim, CATimely Service
Price Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Glass Doors
Bay Windows
Energy-Efficient Options
Window Replacement/Installation
Best Windows and Doors OC
Anaheim, CAPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Custom Window Designs
Window Replacement/Installation
Glass Doors
Vinyl Frames
Window King
Huntington Beach, CAPrice Transparency
Free assessment
Educational Website
Services Offered
Vinyl Frames
Glass Doors
Double-Hung
Window Replacement/Installation
Energy-Efficient Options
Save-On Glass & Screen
Westminster, CATimely Service
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Glass Showers
Mirrors
Glass Doors
Window Repair
Ameristar Windows
Riverside, CAGood Customer Service
Price Transparency
Free assessment
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Vinyl Frames
Glass Showers
Glass Doors
Doheny Builders Supply
Capistrano Beach, CAPrice Transparency
Good Customer Service
Services Offered
Skylights
Glass Doors
Energy-Efficient Options
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Rancho Santa Margarita, 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 Rancho Santa Margarita Saves You Money
Upgrading to energy-efficient windows can help improve the comfort of your home and help you save on electricity bills. Here are more ways switching out your windows could help you:
- Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes usually have windows that are outdated, leaky or potentially even damaged in some way. Upgrading your windows could help raise the value of your property if you decide to sell.
- Save on energy bills: Since energy-efficient windows lower the amount of energy used to heat or cool your home, they can help you save about $388 annually on your energy bills in Rancho Santa Margarita.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out harmful UV rays, reducing fading of your furniture, carpet and other valuables.
- Reduce your carbon footprint: In Rancho Santa Margarita, you can lower your indirect greenhouse gas emissions by about 117 pounds per year after you install energy-efficient windows.
Estimated Cost of Window Replacement in Rancho Santa Margarita
Each window replacement company provides varying services and has different costs based on several factors.
How Much Do New Windows Cost?
Generally, homeowners in Rancho Santa Margarita can expect that most window installations will cost between $250 and $1,200, with the most common installations sitting at about $600. These figures are based on specific characteristics of your installation, like the location of your home, type, number of windows, material, size and more.
Bear in mind that energy-efficient windows may have a higher price, but Energy Star estimates the upgrade will save you between $101 and $583 a year when you replace single-pane windows and between $27 and $197 per year when replacing double-pane, clear glass windows. These savings vary based on your local climate, energy rates and individual home characteristics.
The cost of your window installation will also vary depending on the type of material you choose for the frames. Wood windows are generally the most expensive, but 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?
There are generally two types of window installation services: full-frame and pocket installations.
A full-frame installation is a total window replacement. It involves taking out the old window, the windowsill, and the exterior and interior trim. It also involves extra materials, such as insulation and drip edges, which raise the total cost of the project. It’s also worth noting that it’s not uncommon for homeowners to have to touch up the paint surrounding the window after a full-frame installation. A pocket installation involves replacing a window within the old frame. This means instead of removing the whole unit and reinstalling it, the window installer will just put the replacement window (also called a retrofit or insert window) into the frame.
Your window installation company will be able to advise you on the best type for your project. In Rancho Santa Margarita, the decision will mostly depend on how much damage there is currently and how old your existing frames are.
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 Rancho Santa Margarita
In our search to find the most reliable, eco-friendly window installers in Rancho Santa Margarita, the EcoWatch Reviews team assessed many companies before landing on these. We’ve evaluated the best window installers in Rancho Santa Margarita primarily based on their energy efficient offerings, as it’s the most sustainable option and the best one for homeowners. Energy-efficient windows can cut your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
Since this is a guide for Rancho Santa Margarita, we gave more points to companies that cover the city. There are certainly other reputable providers that didn’t make the cut because of the low odds that they would serve the average homeowner in Rancho Santa Margarita.
Work Quality
When it comes to new windows, the quality and variety of services often plays just as important of a role in overall efficiency and performance as the brand of window you choose. We do give window installers more points if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
Another self-explanatory yet very important review factor is customer feedback. If the majority of customers don’t have nice feedback about their experience with a certain window installation company, you won’t see it featured on EcoWatch.
Cost
Cheaper windows certainly don’t mean better windows, but we know many of our readers want to keep costs low when possible. When analyzing the prices of providers, we awarded higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
As discussed previously, windows are a substantial investment, so you’ll want to make sure that investment is protected. Window installation companies with 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 a while. Window installers that have more experience earn higher rankings by our standards. We like to see at least ten years of experience.
Rancho Santa Margarita, CA Window Replacement FAQs
What is the typical cost to install windows?
The average cost of installing a single window can range between $450 and $650. There are several factors that affect the cost, including local labor costs, the materials used in designing the windows, styles and sizes of windows, your property’s location, how energy-efficient the windows are and the number of windows.
What kind of window is the best for energy efficiency?
A window’s energy efficiency is affected by a number of factors, including the quality of the installation and what kind of window it is. Look for Energy Star Certified windows — these are typically the most energy-efficient since they are certified by the U.S. Department of Energy.
What do window installation companies do?
Window installers go to your house to remove your old windows and replace them with new ones. Some providers install products distributed by other companies, whereas others install their own windows. The installer will also clean up after the installation.
What time of year should I replace my windows?
While you can install windows any time of year, warmer weather is usually better for installing replacement windows. Additionally, the weather should be dry, since rain can make the installation more difficult.
How long does window installation generally take?
Each window takes around 30 minutes to install depending 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 have to be installed.