20 Best Window Companies in South Pasadena, CA (2025 Reviews)

How Installing Energy-Efficient Windows in South Pasadena Saves You Money

When you upgrade to energy-efficient windows, you may see several benefits, such as:

• Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
• Save on power bills: According to the Department of Energy, heat gained or lost through windows makes up about 25-30% of household energy use. Switching to energy-efficient models can help decrease that amount, therefore saving you about 12% more on your bills.
• Protect your investment: When you have an older home, your windows could also be outdated or damaged. Keeping your windows up to date is an important part of maintaining your property and its real estate value.
• Decrease your carbon footprint: Decreasing how much energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by about 117 pounds.

Estimated Cost of Window Replacement in South Pasadena

Let’s go over the cost of window replacement and the types of services you may need for your home.

How Much Do New Windows Cost?

Even though the average cost of installing a single window is about $600, it can range anywhere from $200 to $1,200. This is because the cost of window installations are based on a variety of factors specific to your home, like the size, material and number of windows you need to install, as well as where your property is located.

It’s also worth bearing in mind that energy-efficient windows will cost more initially, but Energy Star estimates that switching out the windows on your South Pasadena home translates to 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. The amount of money you’ll save by switching to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.

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

What Services do Window Installers Offer?

There are generally two kinds of window replacement services: full-frame and pocket installations.

Full-frame installations are necessary when you want to change the style of your windows or your window has significant rot or deterioration. With this service, your installers will replace the whole window, including the sill, trim and frame. A pocket installation entails replacing a window without removing the entire frame, which is generally cheaper than a full-frame installation.

Your window installation company should be able to help you figure out which type of installation you should get.

How We Choose the Best Window Installers in South Pasadena

EcoWatch differs from most reviewers because we evaluate these companies through a sustainability lens. We’ve decided to review the best window installation companies in South Pasadena mostly based on their energy efficient offerings, as the most sustainable option also benefits homeowners in many ways. Energy Star certified windows can lower energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

Because this is a guide for South Pasadena, we paid more attention to companies that provide services to the city. There are certainly other reputable providers that didn’t make our list because they wouldn’t be able to serve homeowners in South Pasadena.

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 on this list to make sure its technicians are well-qualified and that the company has received a lot of positive customer feedback to vouch for its service.

Customer Reviews

Another self-explanatory yet super important review factor is customer feedback. If most customers don’t have good things to say about their experience with a certain window installation company, it won’t be featured on EcoWatch.

Cost

This one is a give-and-take: as with most services, cheap window companies may not provide the highest quality service. Still, we want to make sure we’re highlighting companies that provide a wide range of price and financing options so they’re accessible to most homeowners.

Warranty

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

Years of Experience

Because of South Pasadena’s climate, homeowners need to be wary of rot, low efficiency and water damage. We factored in local experience to reflect the ability of South Pasadena window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.