20 Best Window Companies in Mountlake Terrace, WA (2025 Reviews)

How Installing Energy-Efficient Windows in Mountlake Terrace Saves You Money

There are several perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the change include the following:

• Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only provide better insulation for your home, but also 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• Protect your investment: When you have an older home, your windows could also be outdated or drafty.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 and repairing your windows is an important part of maintaining your property and its value.
• Decrease your carbon footprint: Reducing the amount of energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by 271 pounds per year on average.
• Save money on electricity bills: The Department of Energy estimates that heat gained or lost through windows accounts for around 25-30% of residential energy use. Upgrading to energy-efficient windows can help reduce that amount, which helps you save $394 a year on your bills.

Estimated Cost of Window Replacement in Mountlake Terrace

Each window installation company provides varying services and has varying costs based on several factors.

How Much Do New Windows Cost?

According to our research, the average cost of installing a single window is around $600. However, window installation costs can range from $200 to $1,200 a window. But prices vary remarkably 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 offer door installations and replacements, which have a higher price tag.

With windows, efficiency is the most important factor for most homeowners. High efficiency windows may cost more off the bat, but by increasing the efficiency of your home — especially during the winter — they can provide decades of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save Mountlake Terrace homeowners $394+ a year after replacing single-pane windows.

We advise requesting free quotes from multiple window companies to find the right windows and the company that works best for you.

What Services do Window Installers Offer?

In regard to window installations, in general there are two kinds that your installer will have: full-frame and pocket installations.

Full-frame installations are necessary when you want a new style or your window has a lot of deterioration. With this service, your installers will replace the whole window, including the trim, sill and frame. Pocket installations (or retrofits) involve replacing a window within the existing frame, which makes pocket installations take less time and therefore cost less. However, if the frame has any damage or rot, you will most likely need a full-frame installation instead.

If you’re still trying to decide which kind of installation you need, you can ask your installer and get their recommendation. The choice mostly depends on the age of your window frames and if there’s any damage present.

How We Choose the Best Window Installers in Mountlake Terrace

In our search to make your home improvements easier and more eco-friendly in Mountlake Terrace, EcoWatch assessed dozens of companies before settling on these. Along with energy efficiency, we analyzed several window installers in Mountlake Terrace and assigned rankings using the following methodology:

Service Area

Since this is a guide for Mountlake Terrace, we paid more attention to companies that cover the city. There are other reputable providers that didn’t make our list because they wouldn’t be able to serve homeowners in Mountlake Terrace.

Work Quality

When choosing new windows, the quality and variety of services can often play just as important of a role in insulation and performance as the brand of window you get. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

Customer feedback is another very important review factor. If the majority of customers don’t have nice feedback about their service from a certain installer, you won’t see it featured on EcoWatch.

Cost

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

Warranty

As discussed, windows are a considerable investment, so you’ll want to make sure that investment is well protected. Window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

Last but not least, we like to see companies that have been in the industry for a while. Window installers that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.