Expert Advice On Improving Your Home

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10 Best Window Replacement Companies in Los Altos, CA

More than 380 people have received a free quote in the last 60 days.

Last Updated: February 25, 2025

Whether you want to improve your home's value or decrease your energy bills, upgrading your windows is a great idea. Drafty, leaky windows can cost you in power bills — about an extra $461 a year in Los Altos. The Department of Energy estimates that 25–30% of your house’s heat or cool air could be going out your windows. When searching for a window installation company, it's important to pick the right one, which is why we've written this guide to the top window installation companies in Los Altos.

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.
Top Pick
4.1/5
  • Great quality
  • Free assesment
  • Timely Service
Most Customizable
4.0/5
  • Holds high customer ratings
  • Offers energy-efficient products
  • Provides a lifetime labor warranty
Best Customer Service
4.0/5
  • Award winning company
  • Products made in the US
  • Knowledgeable sales representatives

Top 10 Best Window Replacement Companies in Los Altos

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

Renewal by Andersen of San Francisco

Renewal by Andersen of San Francisco Logo

Our Rating

User Rating

30806 Santana St, Hayward, CA 94544 (510) 803-3110 renewalbyandersen.com

Price transparency

Educational website

Good customer service

Free assessment

Services Offered

Skylights
Window replacement/installation
Double-hung
Glass doors
Bay windows

The Glass Guru

The Glass Guru Logo

Our Rating

User Rating

1601 Enterprise Dr STE 14, Fairfield, CA 94533 (707) 348-9539 theglassguru.com

Educational website

Good customer service

Free assessment

Services Offered

Tempered glass
Storm/impact windows
Fiberglass frames
Skylights
Vinyl frames
Window repair
Glass repair
Energy-efficient options
Metal frames
Glass doors
Custom glass
Mirrors
Window replacement/installation
Triple pane glass
Glass showers
Wood frames
Screen repair

Roxy Glass

Roxy Glass Logo

Our Rating

User Rating

7401-A Morton Ave, Newark, CA 94560 (510) 400-7788 bayareawindowglass.com

Timely service

Good customer service

Free assessment

Educational website

Price transparency

Services Offered

Bay windows
Glass showers
Custom glass
Triple pane glass
Glass repair
Tempered glass
Mirrors
Energy-efficient options
Window replacement/installation
Glass doors

Best Exteriors

Best Exteriors Logo

Our Rating

User Rating

1999 Harrison St #10219, Oakland, CA 94612 (510) 327-0277 bestexteriors.com

Good customer service

Price transparency

Educational website

Timely service

Free assessment

Services Offered

Glass doors
Bay windows
Wood frames
Double-hung
Window replacement/installation
Fiberglass frames
Energy-efficient options
Vinyl frames

California Glass of Vallejo, Inc.

California Glass of Vallejo, Inc. Logo

Our Rating

User Rating

1014 Broadway, Vallejo, CA 94590 (707) 643-5609 calglassofvallejo.com

Good customer service

Educational website

Free assessment

Timely service

Price transparency

Services Offered

Custom glass
Glass repair
Mirrors
Bay windows
Custom window designs
Glass showers
Window replacement/installation
Glass doors

Super Mario Glass Inc

Super Mario Glass Inc Logo

Our Rating

User Rating

544 Lewelling Blvd b, San Leandro, CA 94579 (510) 324-8798 supermarioglass.net

Timely service

Price transparency

Good customer service

Educational website

Free assessment

Services Offered

Custom glass
Glass doors
Window replacement/installation
Mirrors
Window repair
Glass repair
Bay windows
Screen repair
Glass showers

Sunset Glass Inc

Sunset Glass Inc Logo

Our Rating

User Rating

4301 Irving St, San Francisco, CA 94122 (415) 664-1626 sunsetglassinc.com

Free assessment

Educational website

Services Offered

Glass doors
Fiberglass frames
Wood frames
Tempered glass
Vinyl frames
Metal frames
Window replacement/installation
Glass showers
Mirrors

North Glass Windows & Doors

North Glass Windows & Doors Logo

Our Rating

User Rating

105 Main St, Ben Lomond, CA 95005 (831) 336-2288 northglass.net

Price transparency

Good customer service

Free assessment

Services Offered

Glass doors
Window repair
Skylights
Glass showers
Window replacement/installation
Glass repair
Custom glass
Mirrors

Celtic Glass, Inc.

Celtic Glass, Inc. Logo

Our Rating

User Rating

106 Burrows St, San Francisco, CA 94134 (415) 468-0980 celticglassinc.com

Educational website

Free assessment

Good customer service

Price transparency

Services Offered

Bay windows
Vinyl frames
Wood frames
Window repair
Window replacement/installation
Energy-efficient options
Glass showers
Glass doors
Glass repair
Mirrors

J & M Windows and Glass

J & M Windows and Glass Logo

Our Rating

User Rating

745 E McGlincy Ln, Campbell, CA 95008 (408) 371-7255 jandmglass.com

Timely service

Educational website

Price transparency

Good customer service

Free assessment

Services Offered

Glass showers
Mirrors
Glass doors
Skylights
Bay windows
Window replacement/installation
Double-hung
Energy-efficient options
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on window replacement companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How Much Does Window Installation Cost In Los Altos?

Window installation and replacement costs depend on a number of factors, including how difficult your windows are to access or install, the materials you choose, and the number and size of the windows. On average, homeowners in Los Altos spend about $300 per window*. Below are additional cost breakdowns. *Cost data based on sample pricing for window installation from multiple retailers and adjusted for local cost of living.

When To Replace Windows

Replacing your existing windows with new energy-efficient ones can greatly boost your home's appearance, noise reduction, value, insulation, and comfort. Signs it's time to invest in new windows include:

  • Condensation issues, fogging between window panes, or rotting window frames letting in moisture.
  • Windows that are hard to open, close, and lock properly due to age and wear.
  • Cold air and drafts coming in through old, loose-fitting windows.
  • Discomfort and high energy bills due to poor window insulation.
  • Outdated and inefficient window styles that detract from your house's curb appeal.

How To Choose a Window Company

Selecting a window installer with appropriate qualifications helps ensure a smooth installation. We cover the most important considerations for choosing a qualified provider below.

Experience

Find well-established local installers with extensive experience. Installers that have served Los Altos homeowners for years are more likely to understand the local climate and how to best meet your needs. Ask for references from recent customers to verify that a provider delivers quality work.

Certifications

Choose companies that are certified by top window brands, and that have Fenestration and Glazing Industry Alliance (formerly AAMA) certification. Certification means they've gotten suitable training in installation best practices. Make sure installers are staff, not subcontractors, and confirm that any technicians working on your home are certified.

Reputation

Read through online reviews, check the Better Business Bureau (BBB), and ask for local references. Review customer feedback to make sure that the provider consistently delivers quality work and good customer service. Avoid contractors that have complaints of shoddy work or unfinished jobs.

Process

The most qualified company will take time to provide you with a detailed project plan, timeline, expectations, and reviews of all material and installation options. Beware of unclear quotes or timelines that lack clear and specific information. Look for ongoing communication throughout the process to avoid surprises once the project gets underway.

Warranties

Look for providers that guarantee their installations and offer warranties on products and labor. This demonstrates confidence in their window installations. Look for unlimited lifetime warranties that can be transferred to new homeowners.

Materials

Make sure the window company offers durable, long-lasting window options and top energy-saving window brands that fit your budget. Look for design flexibility, good energy ratings, and enhanced UV protection. Check that the window materials also include manufacturer warranties.

Frequently Asked Questions About Window in Los Altos, CA

In Los Altos, the best time to install windows is during the winter when the temperature is not as high, so the windows can fit and adjust properly. A good local window installer in Los Altos will be able to tell you when the best time is to install windows on your home.

The best type of replacement window for your Los Altos home will vary based on the age of your home, as well as your style preference and budget. You'll want to consider the style of your home — such as if it's old — so your new windows match. Wooden windows can provide a traditional look and feel, while vinyl windows tend to be popular in newer homes. Fiberglass-framed windows are also a popular choice, since they are energy efficient and long-lasting.

You can save money on window installation by choosing a budget option like single-hung vinyl windows. These have lower prices compared to other kinds of windows like wood, double-hung, or fiberglass windows.

If your area has average energy costs, you may want to consider replacing all your windows at once. Replacing all your windows at once can greatly improve your home's energy performance, and could help you to save money on your energy bills over time. This is especially beneficial in a place like Los Altos, where energy bills tend to be high.

Replacing your own windows can be a challenging task, especially in Los Altos, where temperatures can get quite hot. It's generally best to get a skilled window installer. A professional installer has the knowledge and experience that ensures your windows are correctly installed and that you get the most out of your investment.

Getting windows professionally installed can provide a number of benefits. Professional installers can ensure that your windows are properly installed, sealed, and insulated, preventing air leakage and maximizing energy efficiency. Professional installers are also well-equipped with the necessary tools and techniques to get the job done, saving you time and money.

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