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  • Written by
    Max Peterson
  • Fact Checked
  • Updated

Replacement windows can protect your home from drafts and moisture problems, increase its energy efficiency, and give it some additional aesthetic appeal. If your windows are getting old or damaged, it's probably time to install new ones. Working with a certified window replacement company will help you get a top-quality outcome and help you steer clear of costly mistakes from attempting to complete the job yourself.

Top Pick
Renewal by Andersen logo
4.7/5

Ratings are based on our detailed proprietary methodology and review standards.

  • Full-service installation
  • Large window selection
  • Nearly 30 years of experience

Buy One Window, Get One 40% OFF

Most Customizable
Power Home logo
4.3/5

Ratings are based on our detailed proprietary methodology and review standards.

  • Full-service remodeling
  • 96% satisfaction rate
  • More than 30 years of experience

Next-Day Appointments Available

Best Financing
DaBella logo
4/5

Ratings are based on our detailed proprietary methodology and review standards.

  • Knowledgeable sales representatives
  • American-made products
  • Great financing options

10 Best Window Replacement Companies in Los Altos

Brands are algorithmically curated from a database of local service providers near you. We require a minimum number of Google reviews and average ratings for provider inclusion.

By choosing one of these best companies for window replacement in Los Altos, you'll reap the benefits of new windows in no time.

Los Altos residents can trust the This Old House Reviews Team to provide relevant and up-to-date window replacement company recommendations in their area. To determine which installers are the best, we focus on these five criteria:

  • Customer reviews and recommendations
  • Energy-efficiency guarantees
  • Services and warranties
  • Product quality
  • Professional experience and licensure

Featured Partner
Renewal by Andersen of San Francisco Logo
Top Rated

Renewal by Andersen of San Francisco

5/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 1471 reviews


30806 Santana St, Hayward, CA 94544

(510) 803-3110

www.renewalbyandersen.com/window-comp...
Sunlight Concepts | Natural Daylighting and Ventilation System - Solatube Dealer Logo

Sunlight Concepts | Natural Daylighting and Ventilation System - Solatube Dealer

4.6/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 173 reviews


1130 Walsh Ave, Santa Clara, CA 95050

(408) 844-0081

sunlightconcept.com
American Vision Windows Logo

American Vision Windows

4.5/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 150 reviews


400 Mathew St, Santa Clara, CA 95050

(408) 444-8941

www.americanvisionwindows.com/locatio...
Argonaut Window & Door, Inc. Logo

Argonaut Window & Door, Inc.

4.4/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 77 reviews


10612 S De Anza Blvd, Cupertino, CA 95014

(800) 430-7535

www.argowin.com
California Deluxe Windows Logo

California Deluxe Windows

4.1/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 45 reviews


3439 De La Cruz Blvd, Santa Clara, CA 95054

(408) 260-5566

cdwindows.com/about/locations-santa-c...

WINDOWS AND GLASS

4/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 16 reviews


966 Parker Ct, Santa Clara, CA 95050

(510) 751-6866

windowsandglass-ca.com

Fast Glass

4.5/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 19 reviews


975 S Bascom Ave, San Jose, CA 95128

(408) 924-0611

www.fastglasscompany.com
Bay Builders and Remodeling Inc. Logo

Bay Builders and Remodeling Inc.

4.5/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 35 reviews


800 Charcot Ave #100, San Jose, CA 95131

(408) 583-6797

baybuilders.com
Roxy Glass Logo

Roxy Glass

4/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 30 reviews


7401-A Morton Ave, Newark, CA 94560

(510) 400-7788

bayareawindowglass.com
Super Glass Logo

Super Glass

4.6/5

Ratings are based on our detailed proprietary methodology and review standards.

Based on 20 reviews


201 Lost Lake Ln, Campbell, CA 95008

(408) 374-7676

www.superglassonline.com

Facts about Los Altos

  • Annual Energy Efficient Windows Savings:
    $562
  • Average Max Temperature:
    71°F
  • Average Min Temperature:
    50°F
  • Average Daily Sunlight:
    69%
  • Average Annual Snowfall:
    0.0”
  • Average Monthly Precipitation:
    1.74”

How To Choose a Window Company in Los Altos

Dependability is important when it comes to choosing a window company. However, your chosen company should also match your priorities and appreciate your vision. Keep in mind the following factors during your company search:

Window Cost by Type

When it comes to replacing your windows, cost-effectiveness is most important. Each window you replace should provide top-notch durability at a reasonable price point. Choosing budget windows could actually increase your overall cost, due to their shorter lifespan and more intensive maintenance needs. The age of your home, together with the styles, sizes, and materials of windows you opt for, can influence pricing. Transom windows are inexpensive with their simple size and straightforward form factor, while new skylights cost more to prepare for and install. It's wise to consult a vetted window installer to figure out your best options.

To help you form a rough estimate, this table shows the typical cost of the most common residential window types.

Window TypesAverage Cost
Arched$272-$1,668
Awning$393-$1,096
Bay$906-$6,722
Custom$403-$1,120
Casement$314-$1,818
Double-hung$146-$946
Egress$269-$671
Glass Block$54-$680
Picture$236-$1,743
Single-hung$107-$1,793
Skylight$134-$1,618
Sliding$309-$1,569
Storm$64-$443
Transom$329-$687

Window Material Cost

Replacement window prices also vary based on material. Each option provides unique advantages depending on your climate and energy efficiency needs. Vinyl and fiberglass are readily-available materials, so they tend to cost less. Likewise, composites and aluminum look sleek and stay strong against the elements, so they tend to cost more.

Window TypesAverage Cost
Aluminum$64-$1,793
Composite$647-$1,454
Fiberglass$107-$906
Vinyl$218-$2,017
Wood$324-$1,818

Other Window Replacement Costs

Ask each company you're considering about warranty fees, labor costs, and permit fees. This will help you gain a complete understanding of the overall expenses involved in the project.

Experience and Training

Examine a company's website and talk to a representative to learn more about its product and service offerings, pricing, and warranties. Many window companies also keep online photo galleries that showcase past projects.

Ensure that the company specializes in window replacement. The more specialized training its staff has, and the longer it has been active, the more likely it will deliver high-quality craftsmanship.

Licensing and Credentials

A California window business must be licensed as a General Building Contractor, Window Coverings Contractor and Glazing Contractor if it takes on jobs valued at over $500. Each license has its own exam and work requirements. If a contractor is caught working without a license, they'll have to pay hefty penalties.

Types of Windows Offered

There are numerous replacement window types you can choose from, and it's essential to find a company that specializes in the ones you want. Check a company's website and reviews for any of these types:

Finally, pay close attention to the materials that a provider uses. Each window frame material has a different life span, energy efficiency level and price point. A company will usually specify whether the windows they place use wood, metal, vinyl, composite, or fiberglass.

Customer Feedback

Perhaps the best way to prescreen window companies for your job is to check what previous customers have said about them. You can find customer reviews on websites like Yelp, Google, Trustpilot, and the BBB. Speak with people you know who have used a company you're interested in, and ask a representative for a copy of its reference list.

Frequently Asked Questions about Window Replacement in Los Altos

More Window Resources

National Windows Company Ranking Methodology

Sources

Energy Star

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

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