20 Best Window Companies in Belvidere, IL (2025 Reviews)

How Installing Energy-Efficient Windows in Belvidere Saves You Money

By switching to energy-efficient windows, you and your family can take advantage of several benefits, including:

• Reduce your carbon footprint: By using less energy once you upgrade to energy-efficient windows, you’ll also be lowering your carbon dioxide emissions by about 12%, according to Energy Star.
• Protect your valuables from fading: When you upgrade to energy-efficient windows with low-emissivity coatings, your floors, carpets and furniture will be protected from fading due to their ability to filter out harmful UV rays.
• Protect your investment: Keeping your windows up to date is an important part of maintaining your property and its real estate value, especially if you have an older home.
• Save money on energy bills: Switching to energy-efficient windows lowers your energy bills by about 12% since you need less energy.

Estimated Cost of Window Replacement in Belvidere

Each window installation company offers various services and has varying costs depending on a few factors.

How Much Do New Windows Cost?

According to our research, the average cost to install a single window is around $600. However, window replacement costs can range from $200 to $1,200 per window. How much it will cost varies depending on several factors, such as number of windows, type, the location of your home, material, size and more.

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 installing single-pane windows and between $27 and $197 a year when you replace double-pane, clear glass windows. Your exact savings will vary depending on your local climate, energy rates and individual home characteristics.

Asking for free quotes from multiple providers is the best way to find out which one will work best for your budget.

What Services do Window Installers Offer?

When considering window installations, there are generally two types that your provider will have: full-frame and pocket installations.

A full-frame installation replaces the complete window, including the sill, frame, trim and the window panes. Because this type of installation is more involved, it will be more expensive than a pocket installation. Pocket installations are simpler and won’t carry as large a bill because they involve simply replacing the window within its existing frame. But if the frame has any damage or deterioration, you may have to get a full-frame installation instead.

If you’re hiring a reputable window installation company, your company can advise you on the best type for your project. In Belvidere, the decision will mostly be based on the efficiency of your home and how old your existing frames are.

How We Choose the Best Window Installers in Belvidere

In our hunt to find the most reliable, eco-friendly window installers in Belvidere, the EcoWatch team landed on the above companies as the best window installation companies in the city. Along with energy efficiency, we evaluated window companies all across the state and ranked them using the following methodology:

Service Area

Because this is a guide for Belvidere, we paid more attention to companies that provide services to the city. There are other reputable providers that didn’t make the list because of the low odds that they would serve the average homeowner in Belvidere.

Work Quality

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

Customer Reviews

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

Cost

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

Warranty

Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Last but not least, we like to see companies that have a proven track record in the industry. Window installation companies that have more years of experience will earn higher rankings by our standards. We like to see at least ten years of experience.