20 Best Window Companies in Moraga, CA (2025 Reviews)
Thinking about replacing your windows? We’ve got you covered in this guide to the top window installation companies.
We analyzed all the top-rated window companies in Moraga 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
The EcoWatch team is all about finding solutions for eco-conscious homeowners in Moraga. If your house has old or damaged windows, your AC or heater could be working overtime to heat or cool your home. This means higher energy bills.
Luckily, saving you money with more efficient windows also helps our goals of conserving energy and the resources it takes to produce it.
We’ve compiled this list of the top installation companies to help you in your search, so you can not only take advantage of brand-new windows, but also save money on your energy 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 Moraga
The EcoWatch team researched several window installation companies in Moraga to find the top ones for our readers. The installers in this article scored best in our review categories, which include energy-efficient offerings, price, customer service, availability, local expertise 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 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 windows industry, and it currently serves 200 locations nationwide. Its reputation is backed by many positive reviews on customer review websites.
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 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 windows 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 Moraga?Prices aren’t available on Window World’s website, but it's known for offering some of the most affordable window installations around. If you’d like to know for sure, you can request a quote on the company’s website.

Milgard Windows & Doors
EnergyStar Partner
Wide network of installers
Lifetime warranty available
Entails hiring third-party contractors
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 windows industry, and it currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties. Its reputation is backed by many positive reviews on customer review websites.
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 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 windows 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 Moraga?Prices aren’t available on Milgard’s website, but it offers different kinds of windows at varying price points. If you’d like to know for sure, you can request a quote on the company’s website.

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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the windows industry, and it currently serves nearly every state except Mississippi and West Virginia. Its reputation is backed by many positive reviews on customer review websites.
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 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 windows 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 Moraga?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. If you’d like to know for sure, you can request a quote on the company’s website.
One thing to note is that the companies in this section are national, meaning the quality of customer service may vary depending on your local crew. We have tried to stay unbiased and transparent by mentioning pros and cons for each company.
More Window Companies in Moraga
Renewal by Andersen of San Francisco
Hayward, CAPrice Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Skylights
Bay Windows
Double-Hung
Glass Doors
Golden Heights Remodeling INC
Concord, CAGood Customer Service
Free assessment
Educational Website
Price Transparency
Services Offered
Bay Windows
Window Replacement/Installation
Cal Coast Window & Door
Pleasanton, CAPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Bay Windows
Glass Doors
Window Replacement/Installation
Energy-Efficient Options
Quality Windows & Doors
Pleasanton, CAPrice Transparency
Good Customer Service
Educational Website
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Mr Window Replacement
Fremont, CAGood Customer Service
Free assessment
Services Offered
Bay Windows
Window Replacement/Installation
Vinyl Frames
GENERAL B CONTRACTOR
San Jose, CAEducational Website
Free assessment
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Santa Rosa Window Tint
Santa Rosa, CAGood Customer Service
Educational Website
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Alexander Company
Burlingame, CAPrice Transparency
Free assessment
Good Customer Service
Services Offered
Window Repair
Window Replacement/Installation
Bay Windows
Glass Doors
Skylights
Window Factory
Greenbrae, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Glass Doors
Bay Windows
Vinyl Frames
Fiberglass Frames
Wood Frames
Window Replacement/Installation
Metal Frames
The Glass Guru
Fairfield, CAGood Customer Service
Educational Website
Free assessment
Services Offered
Fiberglass Frames
Screen Repair
Mirrors
Window Repair
Wood Frames
Custom Glass
Storm/Impact Windows
Vinyl Frames
Energy-Efficient Options
Window Replacement/Installation
Metal Frames
Glass Repair
Glass Doors
Skylights
Triple Pane Glass
Glass Showers
Tempered Glass
Bay Builders and Remodeling Inc.
San Jose, CAGood Customer Service
Free assessment
Educational Website
Price Transparency
Services Offered
Bay Windows
Window Replacement/Installation
Sivan Windows and Doors - San Jose Window and Door Replacement Company
San Jose, CAGood Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Glass Doors
American Window Specialist
Campbell, CAFree assessment
Services Offered
Double-Hung
Window Repair
Vinyl Frames
Window Replacement/Installation
Glass Doors
Bay Windows
Northwest Exteriors
Santa Rosa, CATimely Service
Price Transparency
Educational Website
Free assessment
Services Offered
Vinyl Frames
Window Replacement/Installation
Custom Exteriors, Inc
Pleasanton, CAPrice Transparency
Good Customer Service
Educational Website
Free assessment
Services Offered
Energy-Efficient Options
Custom Window Designs
Window Replacement/Installation
Glass Doors
Bay Windows
R & M Quality Windows & Doors
Newark, CAPrice Transparency
Free assessment
Good Customer Service
Educational Website
Timely Service
Services Offered
Glass Doors
Window Replacement/Installation
Bay Windows
Integrity Windows & Doors
San Jose, CAGood Customer Service
Price Transparency
Services Offered
Glass Doors
Vinyl Frames
Fiberglass Frames
Window Replacement/Installation
Bay Windows
Metal Frames
Wood Frames
B & L Glass
Santa Rosa, CATimely Service
Educational Website
Services Offered
Skylights
Window Replacement/Installation
Glass Repair
Glass Showers
Mirrors
Custom Glass
Glass Doors
Energy-Efficient Options
East County Glass & Window, Inc.
Pittsburg, CAEducational Website
Services Offered
Window Replacement/Installation
Glass Showers
Glass Doors
Bay Windows
Mirrors
American Window Systems, Inc.
Napa, CAEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Skylights
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Moraga, 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 Moraga Saves You Money
By upgrading to energy-efficient windows, you can take advantage of several benefits, including:
- Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
- Reduce your carbon footprint: Since energy-efficient windows improve the insulation in your home, you can cut your indirect greenhouse gas emissions by about 12%, according to Energy Star.
- Save on power bills: According to the Department of Energy, heat gained or lost through windows makes up about 25-30% of household energy use. Switching to energy-efficient models can help lower how much energy is used in your home, therefore saving you about 12% more on your bills.
- Protect your investment: Keeping your windows up to date is an important part of maintaining your property and its real estate value, especially if your home is on the older side.
Estimated Cost of Window Replacement in Moraga
When considering window installation, each company offers different services and prices. Let’s take a look at some average costs and services.
How Much Do New Windows Cost?
According to our research, the average cost to replace a single window is about $600. However, window installation costs can range from $200 to $1,200 for each window. This is because 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 install, as well as the location of your property.
Whether or not you want energy-efficient windows is another factor that will influence the cost. These will typically cost more than other windows, but on the other hand, you can save about $579 a year on your energy bills in Moraga.
Getting free quotes from multiple installers is the best way to figure out which one will work best for your budget.
What Services do Window Installers Offer?
Generally, there are two types of window installation services companies provide: full-frame and pocket installations.
Full-frame installations are necessary when you want to change the style of your windows or your window has significant rot or deterioration. With this service, your installers will replace the whole window, including the frame, sill and trim. Pocket installations (also known as retrofits) are when you replace a window within its existing frame. Pocket installations are simpler and won’t cost as much, but you can’t do this kind of installment if you have any pre-existing rot or water damage.
Your window replacement company should be able to help you decide what’s best for your needs. In Moraga, the decision will mostly depend on how old your home is and if there’s any moisture damage. Wood can decay if it’s not properly maintained over the years, so it’s good to have a professional evaluate your frames and window sills.
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 Moraga
EcoWatch is different from other reviewers, as we look at these companies through a sustainability lens. Along with energy efficiency, we analyzed window companies all across the state and ranked them using the following methodology:
Service Area
Because this is a guide for Moraga, we paid more attention to companies that serve the city. There are other reputable providers that didn’t make the cut because of the low odds that they would serve the average homeowner in Moraga.
Work Quality
We’re willing to bet that you’re looking for a company to do a great job installing windows. We’ve vetted each installer featured on this list to make sure its technicians are well-qualified and that the company has gotten a lot of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed trends in recent customer feedback to find the companies with the most consistent customer satisfaction. Customer satisfaction might be the most important factor, as it reflects the quality of services across most other categories, including quality of installation, quality of parts, professionalism, cost, warranty and more.
Cost
This one is a give-and-take: similar to other services, cheap window installation companies may not provide the most quality service. Still, we want to make sure we’re highlighting companies that offer a range of price and financing options so they’re accessible to most homeowners.
Warranty
Protecting your investment in new windows is important to many homeowners. That’s why window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Moraga’s climate, homeowners need to be wary of low efficiency, rot and water damage. We factored in local experience to reflect the ability of Moraga window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Moraga, CA Window Replacement FAQs
How much does window installation cost?
The national average cost to install a single window is around $600 but can range from $200 to $1,200, depending on a few different factors. The price is typically influenced by the location of your property, the size of the window and the type and material of the window. Also, keep in mind that energy-efficient windows may cost more initially but can save you a decent amount of money a year in energy bills.
What are the kinds of windows?
The most common types of windows for homes include: slider windows, awning windows, double-hung and single-hung windows, casement windows, bay windows, transom windows and picture windows.
What do window installation companies do?
Window installation companies 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.
Should I replace my windows all at the same time?
If your windows are greater than 20 years old, you most likely need to replace all of them. At that point, they are typically less efficient, draftier and/or more damaged than new windows. Doing your windows all at once will involve less paperwork and less time.