20 Best Window Companies in San Anselmo, CA (2025 Reviews)
If you’re thinking of upgrading to new windows, our list of the best window installation companies can help.
We analyzed all the top-rated window companies in San Anselmo 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
A review of the best window replacement companies in San Anselmo 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 think. Damaged or outdated windows can cost you in electric bills. As a matter of fact, the Department of Energy estimates that about 30% of your home’s heat or cool air could be lost through your windows.
Replacement windows improve the insulation in your home, not only making you more comfortable during the summer and winter, but also saving you some money and helping the environment.
We’ve compiled a list of the top installation companies to help you in your research, so you can not only enjoy 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 San Anselmo
The EcoWatch team evaluated several window providers across San Anselmo to narrow our list down to the best ones. The providers in this article scored best in our categories: energy-efficient offerings, availability, customer service, price 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 provides windows expertise in San Anselmo. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has about 27 years of industry experience, and it currently serves 200 locations nationwide.
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 WindowsWindow World appeals to eco-conscious consumers by providing energy-efficient window offerings. 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 San Anselmo?Prices aren’t available on Window World’s website, but it's known for offering some of the most affordable window installations around. For more accurate information on the cost, you can ask for a 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 San Anselmo. It's a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has about 60 years of industry experience, and it currently serves Anaheim, Riverside, Los Angeles, San Bernardino and Orange counties.
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 WindowsMilgard Windows & Doors appeals to eco-conscious consumers by providing energy-efficient window offerings. 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 San Anselmo?Prices aren’t available on Milgard’s website, but it offers different kinds of windows at varying price points. For more accurate information on the cost, you can ask for a 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 San Anselmo. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has about 27 years of industry experience, and it currently serves nearly every state except Mississippi and West Virginia.
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 WindowsRenewal by Andersen appeals to eco-conscious consumers by providing energy-efficient window offerings. 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 San Anselmo?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. For more accurate information on the cost, you can ask for a quote from the company.
We aim to be unbiased and transparent by listing pros and cons for every company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Companies in San Anselmo
Renewal by Andersen of San Francisco
Hayward, CAEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Bay Windows
Double-Hung
Window Replacement/Installation
Glass Doors
Skylights
Golden Heights Remodeling INC
Concord, CAPrice Transparency
Good Customer Service
Educational Website
Free assessment
Services Offered
Bay Windows
Window Replacement/Installation
Santa Rosa Window Tint
Santa Rosa, CAFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
Mr Window Replacement
Fremont, CAGood Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Bay Windows
Vinyl Frames
Cal Coast Window & Door
Pleasanton, CAGood Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Bay Windows
Quality Windows & Doors
Pleasanton, CAPrice Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
GENERAL B CONTRACTOR
San Jose, CAEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Window Factory
Greenbrae, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Vinyl Frames
Glass Doors
Wood Frames
Bay Windows
Metal Frames
Fiberglass Frames
Alexander Company
Burlingame, CAGood Customer Service
Price Transparency
Free assessment
Services Offered
Skylights
Window Replacement/Installation
Window Repair
Bay Windows
Glass Doors
The Glass Guru
Fairfield, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Custom Glass
Energy-Efficient Options
Triple Pane Glass
Mirrors
Glass Doors
Vinyl Frames
Metal Frames
Storm/Impact Windows
Window Replacement/Installation
Fiberglass Frames
Screen Repair
Wood Frames
Window Repair
Tempered Glass
Skylights
Glass Repair
Glass Showers
Northwest Exteriors
Santa Rosa, CAFree assessment
Educational Website
Price Transparency
Timely Service
Services Offered
Window Replacement/Installation
Vinyl Frames
Bay Builders and Remodeling Inc.
San Jose, CAFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Bay Windows
Sivan Windows and Doors - San Jose Window and Door Replacement Company
San Jose, CAPrice Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
American Window Specialist
Campbell, CAFree assessment
Services Offered
Glass Doors
Vinyl Frames
Window Repair
Window Replacement/Installation
Bay Windows
Double-Hung
B & L Glass
Santa Rosa, CAEducational Website
Timely Service
Services Offered
Window Replacement/Installation
Mirrors
Energy-Efficient Options
Glass Showers
Glass Repair
Custom Glass
Skylights
Glass Doors
R & M Quality Windows & Doors
Newark, CATimely Service
Free assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Glass Doors
Bay Windows
Window Replacement/Installation
Custom Exteriors, Inc
Pleasanton, CAFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Bay Windows
Energy-Efficient Options
Glass Doors
Custom Window Designs
American Window Systems, Inc.
Napa, CAPrice Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Skylights
Window Replacement/Installation
East County Glass & Window, Inc.
Pittsburg, CAEducational Website
Services Offered
Glass Doors
Bay Windows
Mirrors
Window Replacement/Installation
Glass Showers
American Vision Windows
Santa Clara, CAPrice Transparency
Educational Website
Free assessment
Services Offered
Vinyl Frames
Wood Frames
Window Replacement/Installation
Fiberglass Frames
Double-Hung
Energy-Efficient Options
Glass Doors
Calculate how much you can expect to pay for window installation and replacement in San Anselmo, 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 San Anselmo Saves You Money
When you upgrade to energy-efficient windows, you may see several perks, including:
- Decrease your carbon footprint: In San Anselmo, you can lower your indirect greenhouse gas emissions by about 117 pounds per year once you switch to energy-efficient windows.
- Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Protect your investment: Upgrading and repairing your windows is an important part of maintaining your property and its value, particularly if you have an older home.
- Save on electricity bills: Because energy-efficient windows lower the amount of energy used to heat or cool your home, they can help you save about $451 annually on your energy bills in San Anselmo.
Estimated Cost of Window Replacement in San Anselmo
When researching window installation, each company provides different services and prices. Let’s go over some typical costs and services.
How Much Do New Windows Cost?
Though the typical cost of replacing one window is around $600, it can range from $200 to $1,200. But costs vary remarkably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also provide door installations, which will make your project cost more.
It’s also worth bearing in mind that energy-efficient windows will usually cost more upfront, but Energy Star predicts that upgrading the windows on your San Anselmo home can mean an average energy savings of $236 to $319 a year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. How much you’ll save by switching to energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.
Asking for free quotes from multiple providers is the best way to figure out which one is right for you.
What Services do Window Installers Offer?
The first question to ask yourself when getting new windows is: Do you need a full-frame installation or a pocket installation?
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 additional materials, like insulation and drip edges, which increase the overall cost of the project. It’s also worth noting that you may have to touch up the paint surrounding the window after a full-frame installation. A pocket installation involves replacing a window without replacing the frame. So, instead of tearing out the whole window and reinstalling it, the contractor will just put the replacement window (also called a retrofit or insert window) into the frame.
If you’re hiring a reputable window installation company, your company can recommend the best type for your project. In San Anselmo, the decision will mostly depend on how much damage there is currently and the age and condition of your existing frames.
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 San Anselmo
EcoWatch reviews are different from most reviews since we examine these companies through a sustainability lens. Along with energy efficiency, we analyzed each installer and ranked them using the following methodology:
Service Area
This one is pretty self-explanatory, but we’ve chosen to highlight window installation companies that serve San Anselmo so you can find the best window installation company near you.
Work Quality
When choosing new windows, the quality and breadth of services often plays just as important of a role in insulation and performance as the type of window you opt for. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent customer feedback to determine the companies with the most consistent customer satisfaction. Customer satisfaction might be the most important factor, as it reflects the quality of services across nearly every category, including quality of parts, quality of installation, warranty, professionalism, cost and more.
Cost
This one is a give-and-take: similar to other services, cheap window companies may not 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
As discussed, windows are a considerable investment, so you’ll want to be certain that investment is well protected. Window installation companies that have lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Due to San Anselmo’s climate, homeowners need to be wary of low efficiency, rot and water damage. We factored in local experience to reflect the ability of San Anselmo window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
San Anselmo, CA Window Replacement FAQs
How much does a window install cost?
The national average cost to install a single window is around $600 but can range between $200 and $1,200, depending on several factors. The price is generally influenced by the location of your property, the type and material of the window 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 are the most common types of replacement windows?
The most common kinds of windows for homes are slider windows, bay windows, picture windows, casement windows, transom windows, double-hung and single-hung windows and awning windows.
What do window installation companies do?
Window installation professionals go to your house to remove your old windows and replace them with new ones. Some companies install products made by other companies, whereas others install their own windows. The installer will also clean up after the installation.
How do you know it’s time to replace your windows?
Windows have a typical lifespan of about 20 to 30 years. If your windows are older than that, they should probably be replaced. Apart from that, if your windows have any damage on them, or they have become difficult to open or close, they may be in need of replacement.