10 Best Window Replacement Companies in Clearlake, CA

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Last Updated: February 25, 2025

Upgrading your windows can be costly, but is an excellent way to improve your home's energy efficiency and its value. Drafty windows can cost you in energy bills — about an extra $461 a year in Clearlake. The Department of Energy estimates that about 30% of your home’s heat or cool air could be lost through your windows. Our guide to the top window installers in Clearlake will help you find the best installer for you.

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Top Pick
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  • Holds high customer ratings
  • Offers energy-efficient products
  • Provides a lifetime labor warranty
Best Customer Service
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  • Products made in the US
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Top 10 Best Window Replacement Companies in Clearlake

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.

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

Free assessment

Good customer service

Services Offered

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

California Glass of Vallejo, Inc.

California Glass of Vallejo, Inc. Logo

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User Rating

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

Price transparency

Educational website

Free assessment

Good customer service

Timely service

Services Offered

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

Novato Glass Inc

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1020 Reichert Ave, Novato, CA 94945 (415) 897-5117 novatoglassinc.com

Price transparency

Good customer service

Free assessment

Services Offered

Window replacement/installation
Mirrors
Energy-efficient options
Bay windows
Skylights
Custom glass
Glass doors
Glass showers

Jack Smith Glass & Sash Inc.

Jack Smith Glass & Sash Inc. Logo

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1050 N Dutton Ave, Santa Rosa, CA 95401 (707) 544-0640 jacksmithglass.com

Price transparency

Good customer service

Free assessment

Educational website

Services Offered

Mirrors
Glass showers
Glass doors
Custom window designs
Window replacement/installation
Skylights
Window repair
Wood frames

Home Services at The Home Depot

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User Rating

100 Bicentennial Way, Santa Rosa, CA 95403 (707) 296-1261 homedepot.com

Price transparency

Free assessment

Educational website

Good customer service

Services Offered

Energy-efficient options
Window replacement/installation
Storm/impact windows
Screen repair
Glass showers
Vinyl frames
Mirrors
Custom window designs
Glass doors

Window Replacement Fairfield

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User Rating

2300 Boynton Ave #144, Fairfield, CA 94533 (707) 404-3062 bestexteriors.com

Free assessment

Price transparency

Timely service

Educational website

Good customer service

Services Offered

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

B & L Glass

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User Rating

3175 Cleveland Ave, Santa Rosa, CA 95403 (707) 546-4143 blglass.com

Timely service

Educational website

Services Offered

Glass repair
Mirrors
Glass doors
Energy-efficient options
Custom glass
Skylights
Glass showers
Window replacement/installation

Round Tree Glass

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User Rating

24 Monroe St, Willits, CA 95490 (707) 459-6163 roundtreeglass.com

Timely service

Good customer service

Price transparency

Educational website

Services Offered

Window repair
Mirrors
Glass showers
Window replacement/installation
Custom window designs
Glass repair

Vallejo Glass Inc.

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User Rating

205 Couch St, Vallejo, CA 94590 (707) 644-4447 vallejoglass.com

Services Offered

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

Coastal View Builder

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User Rating

125 S Main St #216, Sebastopol, CA 95472 (707) 329-6727 coastalviewbuilders.com

Good customer service

Price transparency

Free assessment

Services Offered

Window replacement/installation
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 Clearlake?

Window installation and replacement costs will be influenced by several factors, including the materials you choose, how difficult your windows are to access or install, and the number and size of the windows. On average, homeowners in Clearlake should expect to spend about $280 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

New, energy-efficient windows can greatly boost your home's comfort, value, noise reduction, insulation, and appearance. Clear indicators that it's time for window replacement include the following:

  • Cold air and drafts leaking in through old, loose-fitting windows.
  • Condensation issues, fogging between window panes, or rotting window frames letting in moisture.
  • Inefficient and outdated window styles that take away from your home’s curb appeal.
  • High energy bills and discomfort from poor insulation.
  • Windows that are hard to close, open, and lock properly due to wear and age.

How To Choose a Window Company

Finding a truly qualified window installer is critical to a successful project. Below, we cover the most important considerations when it comes to deciding which company to hire.

Experience

Look for an established local window company with many years or decades of success installing all window types. Experienced providers are more likely to understand Clearlake's climate and will know how to meet your needs. To verify a provider's reputation, request references from recent customers.

Certifications

Choose companies that have certifications from top window brands, and that have Fenestration and Glazing Industry Alliance (formerly AAMA) certification. Certification means they've received proper 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 verify that the company consistently provides quality work and good customer service. Avoid companies that have complaints of shoddy work or unfinished jobs.

Process

The best window installation providers will supply a detailed project plan and schedule, clear expectations, and an overview of all material and installation options. Avoid companies that offer ill-defined quotes or timelines that lack necessary details. Look for ongoing contact throughout to avoid surprises once work gets underway.

Warranties

Research window firms that provide guarantees on their work, and that offer warranties on materials and labor. This indicates faith in their work. Also seek out unlimited lifetime warranties that can transfer to new homeowners.

Materials

Confirm that a window installer offers durable, long-lasting windows and leading energy-efficient window bands that fit your budget. Research choices with enhanced UV protection, good energy ratings, and design flexibility. Verify that the materials have their own manufacturer warranties.

Frequently Asked Questions About Window in Clearlake, CA

The ideal time to install windows in Clearlake is when temperatures are moderate, generally in the spring or fall. This allows installers to do their work without having to worry about the weather.

The best type of replacement window for your Clearlake home will depend on the age of your home, as well as your personal style and budget. You'll want to consider the style of your home — such as if it's newer — so your new windows match. Wooden windows can give a classic look and feel, while vinyl-framed windows tend to be popular in more modern homes. Fiberglass windows are also a popular choice, as they can be energy efficient and durable.

The most expensive windows are those with multiple moving parts such as double-hung and casement windows. They are more intricate than single-hung windows, which makes them more costly. Single-hung windows are the most budget-friendly on the market. Vinyl and aluminum are the most affordable frame options.

It depends on your budget and the condition of your current windows. If your current windows are in reasonable condition, you may want to wait and only replace the ones that need to be replaced. If you're in an area that has average energy costs, you may want to consider replacing all your windows at once to get the highest energy savings.

In some cases, you can replace your own windows, but it's better to hire a professional. It's important to consider the local climate when replacing windows, as it will have an effect on the process. For example, the temperatures in Clearlake can reach an average high of 66, so you need to consider energy-efficient windows that can deflect from the heat. It's also important to measure correctly and follow the instructions for installation. Hiring a professional for your window replacement project will ensure that everything is installed correctly.

Getting windows installed by a professional can provide a number of benefits. Professional installers can ensure that your windows are properly installed, sealed, and insulated, minimizing air leakage and maximizing energy efficiency. Professional installers are also well-equipped with the necessary tools and techniques to do the job right, which can save you time and money.

Other Clearlake, CA Home Services

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