20 Best Window Companies in Sullivan, NY (2025 Reviews)

How Installing Energy-Efficient Windows in Sullivan Saves You Money

When you upgrade to energy-efficient windows, you may see a few perks, such as:

• Save on power bills: After you upgrade to energy-efficient windows, you can expect a reduction in your bills by about 12% since you’ll use less energy to heat or cool your house.
• Protect your investment: If you have a relatively old home, your windows are most likely in need of replacement. Upgrading your windows can make your home more comfortable and also help raise the value of your home if you decide to sell.
• Reduce your carbon footprint: Since energy-efficient windows improve the insulation in your house, you can lower your indirect greenhouse gas emissions by about 12%, according to Energy Star.
• Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.

Estimated Cost of Window Replacement in Sullivan

Windows come in different styles, shapes and purposes, so costs and services will vary remarkably depending on several factors. Below, we go over the average cost and services that you can get from window replacement companies.

How Much Do New Windows Cost?

According to our market 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. These amounts are based on specific characteristics of your installation, including size, the location of your home, material, number of windows, type and more.

It’s also worth bearing in mind that energy-efficient windows will usually cost more initially, but Energy Star estimates that switching out the windows on your Sullivan home can mean an average energy savings of $236 to $319 a year for single-pane window replacement, or between $87 to $126 a year for double-pane windows. The amount of money you’ll save by switching to energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.

We recommend requesting free quotes from several window installation companies to find the one that works best for your budget.

What Services do Window Installers Offer?

There are generally two types of window installation services: 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 other materials, such as insulation and drip edges, which increase the overall cost of the project. Also worth noting: you may have to touch up the paint surrounding the window after a full-frame installation. A pocket installation involves replacing a window without removing the entire frame, which is usually cheaper than a full-frame installation.

If you’re still trying to decide which type of installation to get, you can talk to your installer and get their recommendation. The decision mostly is influenced by how old the frames are and if there’s any damage present.

How We Choose the Best Window Installers in Sullivan

In our hunt to make your home improvements easier and more eco-friendly in Sullivan, the EcoWatch team chose the above companies as the best window installation companies in the city. We’ve assessed the top window replacement companies in Sullivan mainly based on energy efficiency, as it’s the most sustainable option and the best one for homeowners. Energy-efficient windows have been shown to lower power bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

Because this is a guide for Sullivan, we gave more points to companies that provide services to the city. There are certainly other reputable providers that didn’t make the cut because they wouldn’t be able to serve homeowners in Sullivan.

Work Quality

When it comes to new windows, the quality and breadth of services often plays just as important of a role in insulation and performance as the brand 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

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

Cost

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

Warranty

As discussed, windows are a hefty investment, so you’ll want to be certain that investment is protected. Window installation companies that have lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

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