20 Best Window Companies in St. Charles, IL (2025 Reviews)

How Installing Energy-Efficient Windows in St. Charles Saves You Money

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

• Save on energy bills: According to the Department of Energy, heat gained or lost through windows accounts for around 25-30% of household energy use. Replacing your windows with energy-efficient models can help reduce how much energy is used in your home, therefore saving you about 12% more on your bills.
• Decrease your carbon footprint: In St. Charles, you can cut your indirect greenhouse gas emissions by about 449 pounds per year after you install energy-efficient windows.
• Protect your valuables: The low-emissivity coatings on many energy-efficient windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.
• Protect your investment: When you have an older home, your windows could also be outdated or damaged. Upgrading your windows is an important part of maintaining your property and its real estate value.

Estimated Cost of Window Replacement in St. Charles

Each window replacement company offers varying services and has different costs depending on several factors.

How Much Do New Windows Cost?

Though the typical cost to install one window is around $600, it can range anywhere from $200 to $1,200. But costs will differ significantly depending on the number of windows you need, the quality of your products, your location and the current condition of your home. Many window companies also offer replacement door installations and other add-ons like coating, shutters, baths and more. Additional services will increase your overall project costs.

Whether or not you want energy-efficient windows is another factor that will influence the cost. These will usually cost more than other windows, but on the other hand, you can save about $297 a year on your energy bills in St. Charles.

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

What Services do Window Installers Offer?

Generally, there are two types of window replacement services you can get: full-frame and pocket installations.

A full-frame installation is a total window replacement. This service involves taking out the old window, the sill, and the exterior and interior trim. It can also involve additional materials, such as insulation and drip edges, which increase 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. Pocket installations (or retrofits) involve installing a new window within the existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.

Your window installation company should be able to help you decide what’s best for your needs. In St. Charles, the decision will mostly depend on the age of your home and if there’s any damage. Wood can decay if not maintained properly over the years, so it’s a good idea to have a professional assess your frames and window sills.

How We Choose the Best Window Installers in St. Charles

EcoWatch reviews differ from most reviews because we examine these companies through a sustainability lens. We have reviewed the best window installers in St. Charles mostly based on energy efficiency, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can reduce your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

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

Work Quality

When selecting new windows, the quality and breadth of services can often play just as important of a role in overall efficiency and performance as the brand of window you opt for. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent customer feedback to find the companies with the most consistent customer satisfaction. Customer satisfaction might be the most important factor, as it reflects the quality of services across most other categories, including cost, warranty, quality of installation, quality of parts, professionalism and more.

Cost

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

Warranty

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

Years of Experience

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