20 Best Window Companies in New Milford, CT (2025 Reviews)
When you need to replace your windows, our list of the top window installation companies can help you find the right provider for you.
We analyzed all the top-rated window companies in New Milford and selected the best 20 based on:
Customer reviews
Window installation expertise
Popularity with home-owners like you
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Why you can trust EcoWatch
Although clean energy sources like wind and solar are important when it comes to lowering your carbon footprint, improving your house’s energy efficiency can also have a considerable impact on home energy conservation. If you have traditional, outdated windows, your HVAC system could be working overtime to heat or cool your house. This means higher energy bills.
Fortunately, helping you save money with upgraded windows also helps our goals of conserving energy and the resources it takes to make it.
As windows have such a large impact on your home, selecting the right company for you is a big choice to make. That’s why the EcoWatch team has made this list of the best window installation companies, so you can make an informed decision more easily.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Window Installation & Replacement Companies in New Milford
The EcoWatch Reviews team assessed dozens of companies that service the New Milford area to find the top window installation companies that fit our standards. The companies reviewed in this article scored best in our categories, including energy-efficient offerings, availability, price, customer service and more.

Window World
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
Quality of service will depend on your area
Window World is the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has around 27 years of experience in the industry, and it currently serves 200 locations nationwide.
It has established itself as a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsWindow World carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality Energy Star windows when inquiring. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.
How much does Window World cost in New Milford?Window World does not list prices on its website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate pricing information, you can receive a quote on the company’s website.

Renewal by Andersen
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
More expensive than competition
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the industry, and it currently serves nearly every state except Mississippi and West Virginia.
It has established itself as a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality Energy Star windows when inquiring. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.
How much does Renewal by Andersen cost in New Milford?Andersen does not list prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. If you’d like more accurate pricing information, you can receive a quote on the company’s website.

Aeroseal Windows
Many years of experience
Great industry reputation
Low number of customer complaints
Manufactures products in-house
Custom Designs
No lifetime warranty
Not ideal for residential installations
Aeroseal Windows is an installer that mainly serves commercial and multifamily properties, and also specializes in railings. If you’re looking for residential window installations, you should probably refer to one of the other companies on this list. Aeroseal has around 23 years of experience in the industry, and it currently serves 13 states and Washington D.C.
It has established itself as a company that installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality Energy Star windows when inquiring. The company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more.
How much does Aeroseal Windows cost in New Milford?Aeroseal does not list prices on its website, but it provides high-quality windows at a competitive price point. If you’d like more accurate pricing information, you can receive a quote on the company’s website.

Window Nation
Award-winning company
Manufactures products in-house
Custom designs
Wide variety of products and services
Installation not covered by warranty
Limited service area
Window Nation is a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has around 16 years of experience in the industry, and it currently serves residents within 75 miles of its showrooms, which are in 13 states.
It has established itself as a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.
Energy Efficiency of Window Nation WindowsWindow Nation carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality Energy Star windows when inquiring. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.
How much does Window Nation cost in New Milford?Window Nation does not list prices on its website, but based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. If you’d like more accurate pricing information, you can receive a quote on the company’s website.
We strive to be unbiased and transparent by including pros and cons for every installer. Additionally, any partnerships do not affect our reviews.
More Window Companies in New Milford
Renewal by Andersen Window Replacement
Middletown, CTPrice Transparency
Good Customer Service
Free assessment
Services Offered
Double-Hung
Bay Windows
Glass Doors
Custom Window Designs
Energy-Efficient Options
Vinyl Frames
Window Replacement/Installation
Power Home Remodeling
Trumbull, CTFree assessment
Timely Service
Good Customer Service
Price Transparency
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Window Nation
Wallingford, CTPrice Transparency
Educational Website
Free assessment
Services Offered
Bay Windows
Custom Window Designs
Energy-Efficient Options
Double-Hung
Window Replacement/Installation
Glass Doors
Bert Falsetti's Home Improvement LLC
Shelton, CTServices Offered
Double-Hung
Energy-Efficient Options
Window Replacement/Installation
Vinyl Frames
Window Depot USA of Southern CT
Trumbull, CTGood Customer Service
Price Transparency
Timely Service
Educational Website
Free assessment
Services Offered
Triple Pane Glass
Vinyl Frames
Glass Doors
Energy-Efficient Options
Double-Hung
Window Replacement/Installation
Bay Windows
Putnam Windows Inc.
Cold Spring, NYGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Wood Frames
Vinyl Frames
ZN Construction
Canton, CTEducational Website
Free assessment
Price Transparency
Good Customer Service
Timely Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
United Home Experts
Norwalk, CTEducational Website
Free assessment
Good Customer Service
Price Transparency
Services Offered
Fiberglass Frames
Window Replacement/Installation
Paramount Gallery
West Hartford, CTPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Glass Doors
Custom Window Designs
Window Replacement/Installation
Energy-Efficient Options
Greenwich Windows Replacement
Greenwich, CTEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Bay Windows
Window Replacement/Installation
Double-Hung
Big Dawg Home Improvements
South Windsor, CTGood Customer Service
Timely Service
Free assessment
Price Transparency
Services Offered
Window Repair
Window Replacement/Installation
Energy-Efficient Options
Skylights
Northern Windows Siding, Roofing and Insulation
Goshen, NYFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Energy-Efficient Options
M & R Windows
Bronx, NYTimely Service
Price Transparency
Services Offered
Window Replacement/Installation
Aspen Home Remodeling, LLC.
Oradell, NJEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Skylights
Energy-Efficient Options
Window Replacement/Installation
Budget Blinds of Enfield and Hartford
Somers, CTFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Custom Window Designs
Window Replacement/Installation
Doors & Windows
Albertson, NYEducational Website
Online product shopping
Sunday availability
Price Transparency
Free assessment
Good Customer Service
Free in-home or virtual consultation
Services Offered
Double-Hung
Bay Windows
Window Replacement/Installation
Vinyl Frames
Wood Frames
Flawless Glass & Mirror LLC
Holbrook, NYPrice Transparency
Educational Website
Free in-home consultation
Good Customer Service
Customized glass options
Owner-operated small business
Free assessment
Services Offered
Window Replacement/Installation
Glass Showers
Mirrors
Frank Conforti Contracting
North Haledon, NJPrice Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Skylights
Window Repair
HDL Construction LLC — Windows replacement, Roofing, Roof service, Siding replacement, Chimney, Deck, Masonry
Hasbrouck Heights, NJPrice Transparency
Good Customer Service
Free assessment
Educational Website
Free in-home consultation
Saturday and Sunday availability
24-hour emergency service
Services Offered
Window Replacement/Installation
Kubala Home Improvement
Ludlow, MAFree assessment
Price Transparency
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in New Milford, CT using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in New Milford Saves You Money
By switching to energy-efficient windows, you and your family can benefit in several ways, such as:
- Reduce your carbon footprint: You can reduce your carbon footprint by about 12% after you install Energy Star certified windows. In New Milford, that’s about 147 pounds per year on average.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Save money on power bills: Once you upgrade to energy-efficient windows, you can see a reduction in your bills by about 12% because you’ll require less energy to heat or cool your home.
- 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 increase the value of your house if you decide to sell.
Estimated Cost of Window Replacement in New Milford
Let’s go over the cost of window replacement and the kinds of services offered by installers.
How Much Do New Windows Cost?
The typical cost to replace a single window is about $600 but can range from $200 to $1,200. Costs will vary considerably depending on the number of windows you need, the quality of your products, the current condition of your home and your location. A lot of window companies also offer door installations and other add-ons like baths, shutters, coating and more. These extra services will increase overall project costs.
With windows, efficiency is the most important factor for most homeowners. Efficient windows may cost more upfront, but by increasing the efficiency of your home — especially during the summer and winter — they can give you decades of energy savings. According to Energy Star, buying certified energy-efficient windows can save New Milford homeowners $486+ a year after replacing single-pane windows.
The cost of your window installation will also vary depending on the kind of window material you choose for the frames. Wood windows are generally the most expensive, but it depends on whether they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are more efficient.
What Services do Window Installers Offer?
The first step of a window installation is to figure out whether you should get a full-frame or pocket installation.
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 total window, including the trim, sill and frame. Pocket installations (also known as retrofits) are when you replace a window without replacing the frame. Pocket installations are on the simpler end and won’t cost as much, but you can’t do this type of installment if you have any pre-existing rot or water damage.
If you’re unsure which kind of window installation service you need, your installer should be able to help you out. Generally, the choice is based on factors such as the age and condition of the home, the type of building material, budget and time restrictions.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
How We Choose the Best Window Installers in New Milford
EcoWatch reviews are different from other reviews because we look at these companies through a sustainability lens. Along with energy efficiency, we assessed several window installers in New Milford and assigned rankings using the following methodology:
Service Area
This one is self-explanatory, but we’ve chosen to highlight window installation companies that serve the New Milford area so you can find the best window installation company near you.
Work Quality
When picking new windows, the quality and variety 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 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 the majority of customers don’t have good things to say about their experience with a certain company, it won’t be featured on EcoWatch.
Cost
This one is a give-and-take: as with most services, cheap window installers won’t always provide the highest quality service. On the other hand, we want to ensure we’re highlighting companies that offer a wide range 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 provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Due to New Milford’s climate, homeowners need to be wary of water damage, low efficiency and rot. We factored in local experience to reflect the ability of New Milford window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
New Milford, CT Window Replacement FAQs
How much does a window install cost?
The national average cost to install one window is around $600 but can range from $200 to $1,200, depending on a variety of factors. The price is typically influenced by the location of your property, the size of the window and the type and material of the window. Also, keep in mind that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.
Which kind of window should I get?
Generally, double-pane windows are more efficient than single-pane windows and windows that do not open are more efficient than windows that do. To be sure you’re getting the most energy-efficient windows, look for models with the blue Energy Star certification — they’re certified energy-efficient by the U.S. Department of Energy.
What services do window installation companies provide?
Window installation professionals will do the entire process — from replacing your old windows with brand-new ones to cleaning up afterward. Additionally, a lot of companies offer window manufacturing, customization and repairs.
When is it time to replace your windows?
Windows have an average lifespan of about 20 to 30 years. If your windows are older than that, then they probably need to be replaced. Other than that, if your windows have any damage on them, or they have become difficult to open or close, they may be in need of replacement.