20 Best Window Companies in Mill Valley, CA (2025 Reviews)

How Installing Energy-Efficient Windows in Mill Valley Saves You Money

Switching to energy-efficient windows can improve the comfort of your home and help you save on electricity bills. Here are more details about how upgrading your windows could help you:

• Decrease your carbon footprint: In Mill Valley, you can cut your indirect greenhouse gas emissions by about 117 pounds per year when you install energy-efficient windows.
• Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
• Protect your investment: When you have an older home, your windows could also be outdated or drafty. Upgrading your windows is an important part of maintaining your property and its value.
• Save on energy bills: Upgrading to energy-efficient windows reduces your energy bills by about 12% since you need less energy.

Estimated Cost of Window Replacement in Mill Valley

When researching window installation, each company offers varying services and costs. Let’s take a look at some average costs and services.

How Much Do New Windows Cost?

Typically, homeowners in Mill Valley can expect that most window installations will range from $250 to $1,200, with the most common installations sitting at around $600. But costs vary considerably 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 replacements, which will add extra costs to your project.

Bear in mind that energy-efficient windows may cost more, but Energy Star estimates the upgrade will save you between $101 and $583 per year when you replace single-pane windows and between $27 and $197 a year when you replace double-pane, clear glass windows. These savings vary depending on your local climate, energy rates and individual home characteristics.

Asking for free quotes from several providers is the best way to find out which one is right for you.

What Services do Window Installers Offer?

The first step of a window installation is to figure out whether you should get a full-frame or pocket installation.

A full-frame installation is a total window replacement. It involves removing the old window, the windowsill, and the exterior and interior trim. It can also involve additional materials, such as insulation and drip edges, which raise the overall cost of the project. Also worth noting: it’s not uncommon for homeowners to have to touch up the paint around the window after a full-frame installation. A pocket installation entails installing a new window within the existing frame. So, instead of taking out the whole window and rebuilding it, the installer will just slide the replacement window (also called a retrofit or insert window) into the frame.

If you’re unsure which kind of window installation service you should get, your installer can help you out. In general, the choice is influenced by factors such as the age and condition of the home, the type of building material, budget and time restrictions.

How We Choose the Best Window Installers in Mill Valley

EcoWatch reviews differ from most reviews since we assess these companies through a sustainability lens. Along with energy efficiency, we evaluated several window installers in Mill Valley and assigned rankings using the following methodology:

Service Area

This one is self-explanatory, but we’ve chosen to highlight window installation companies that serve a wide variety of states and cities so you can find the best window installation company near you.

Work Quality

We’re willing to bet that you’re looking for professionals who do a great job installing windows. We’ve vetted each installer included in our guide to ensure its contractors are well-qualified and that the company has received lots of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed trends in recent online reviews to determine the companies with the highest rates of customer satisfaction. Customer satisfaction may be the most important factor, as it reflects the quality of services across most other categories, including professionalism, quality of parts, warranty, cost, quality of installation and more.

Cost

Cheaper windows don’t necessarily mean better windows, but we know many of our readers would like to keep costs as low as possible. When analyzing the prices of providers, we awarded higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.

Warranty

As discussed, windows are a significant investment, so you’ll want to make sure that investment is well protected. Window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Due to Mill Valley’s climate, homeowners will want to mitigate water damage, rot and low efficiency. We factored in local experience to reflect the ability of Mill Valley window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.