20 Best Window Companies in Ontario, OR (2025 Reviews)

How Installing Energy-Efficient Windows in Ontario Saves You Money

When you upgrade to energy-efficient windows, you may see some perks, including:

• Protect your investment: When you have an older home, your windows could also be outdated or leaky. Upgrading your windows is an important part of maintaining your property and its real estate value.
• Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
• Reduce your carbon footprint: In Ontario, you can lower your indirect greenhouse gas emissions by about 271 pounds per year when you switch to energy-efficient windows.
• Save on power bills: According to the Department of Energy, heat gained or lost through windows accounts for about 25-30% of household energy use. Replacing your windows with energy-efficient models can help lower that amount, therefore saving you about 12% more on your bills.

Estimated Cost of Window Replacement in Ontario

Windows come in different shapes and sizes, so costs and services will vary remarkably. Here are the typical costs and the primary services that you can find from window installation companies.

How Much Do New Windows Cost?

According to our research, the national average cost to replace a single window is about $600. However, window installation costs can range from $200 to $1,200 per window. But costs differ 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 replacements, which have a higher price tag.

It’s also worth keeping in mind that energy-efficient windows will almost always cost more upfront, but Energy Star predicts that upgrading the windows on your Ontario home can mean an average energy savings of $236 to $319 each year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. How much you’ll save by installing energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.

Something else that affects the overall cost is the material of the frame you pick. Aluminum frames are generally the least expensive and are sturdy and relatively maintenance-free, but they offer poor insulation. On the other hand, wood frames cost the most, as they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.

What Services do Window Installers Offer?

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

Full-frame installations are usually done when you want to change the style of your windows or your window has a lot of deterioration. With this service, your professionals will replace the whole window, including the sill, trim and frame. A pocket installation entails replacing a window without taking out the whole frame, which is usually less expensive than a full-frame installation.

If you’re still debating which type of installation you should get, you can ask your provider and get their advice. The choice mostly depends on how old the frames are and if there’s any damage present.

How We Choose the Best Window Installers in Ontario

The EcoWatch Reviews team differs from most reviewers since we’re examining these companies through a sustainability lens. Along with energy efficiency, we assessed each installer and assigned rankings based on the following methodology:

Service Area

This one is self-explanatory, but we’ve chosen to highlight window installers that serve the Ontario area 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 on this list to make sure its contractors are well-qualified and that the company has received lots of positive customer feedback to vouch for its service.

Customer Reviews

Customer feedback is another very important review factor. If most customers don’t have good things to say 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 companies won’t always provide the most quality service. Still, we want to make sure we’re highlighting companies that offer a variety of price and financing options so they’re accessible to most homeowners.

Warranty

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

Years of Experience

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