20 Best Window Companies in Danbury, CT (2025 Reviews)
Are you thinking of upgrading your windows? Our guide to the best window installation companies can help you choose the right one for you.
We analyzed all the top-rated window companies in Danbury 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
Whether you're updating for aesthetics or have old windows, windows play a vital role in conserving energy in your home. Drafty windows could lead to having higher electric bills during the winter or summer months.
That’s not great for your wallet or the environment, but one of the top window installation companies can help you with that.
Unlike other sites, EcoWatch ranks window replacement companies on energy efficiency while also taking into consideration cost, customer satisfaction and service area.
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 Danbury
The EcoWatch team researched dozens of window providers across Danbury to narrow our list down to the top ones. The providers we’ve reviewed in this article scored best in our categories: energy-efficient offerings, customer service, availability, price 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 provides windows expertise in Danbury. Window World has over 27 years of experience in the windows industry, and it currently serves 200 locations nationwide. The provider has a lot of positive reviews from customers on online review websites.
You may want to consider opting for Window World if you're looking for a installer 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 is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Window World representative when inquiring about services.
How much does Window World cost in Danbury?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 to know for sure, you can inquire about 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 provides the best availability in Danbury. Andersen has over 27 years of experience in the windows industry, and it currently serves nearly every state except Mississippi and West Virginia. The provider has a lot of positive reviews from customers on online review websites.
You may want to consider opting for Andersen if you're looking for a installer 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 is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Danbury?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 to know for sure, you can inquire about 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 provides the best window installation for businesses in Danbury. Aeroseal has over 23 years of experience in the windows industry, and it currently serves 13 states and Washington D.C. The provider has a lot of positive reviews from customers on online review websites.
You may want to consider opting for Aeroseal if you're looking for a installer that installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Aeroseal representative when inquiring about services.
How much does Aeroseal Windows cost in Danbury?Aeroseal does not list prices on its website, but it provides high-quality windows at a competitive price point. If you’d like to know for sure, you can inquire about 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 provides the best residential windows in Danbury. Window Nation has over 16 years of experience in the windows industry, and it currently serves residents within 75 miles of its showrooms, which are in 13 states. The provider has a lot of positive reviews from customers on online review websites.
You may want to consider opting for Window Nation if you're looking for a installer 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 is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Window Nation representative when inquiring about services.
How much does Window Nation cost in Danbury?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 to know for sure, you can inquire about a quote on the company’s website.
We strive to remain unbiased and transparent by listing pros and cons for each company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Companies in Danbury
Renewal by Andersen - Branford
Branford, CTGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Skylights
Double-Hung
Glass Doors
Bay Windows
Window Replacement/Installation
Power Home Remodeling
Trumbull, CTFree assessment
Price Transparency
Good Customer Service
Timely Service
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Window Nation
Wallingford, CTFree assessment
Educational Website
Price Transparency
Services Offered
Energy-Efficient Options
Custom Window Designs
Double-Hung
Glass Doors
Bay Windows
Window Replacement/Installation
Window Depot USA of Southern CT
Trumbull, CTEducational Website
Price Transparency
Timely Service
Free assessment
Good Customer Service
Services Offered
Glass Doors
Double-Hung
Bay Windows
Vinyl Frames
Window Replacement/Installation
Triple Pane Glass
Energy-Efficient Options
Bert Falsetti's Home Improvement LLC
Shelton, CTServices Offered
Vinyl Frames
Double-Hung
Energy-Efficient Options
Window Replacement/Installation
United Home Experts
Norwalk, CTEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Fiberglass Frames
Window Replacement/Installation
Putnam Windows Inc.
Cold Spring, NYEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Vinyl Frames
Wood Frames
Glass Doors
Greenwich Windows Replacement
Greenwich, CTPrice Transparency
Good Customer Service
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Bay Windows
Double-Hung
M & R Windows
Bronx, NYPrice Transparency
Timely Service
Services Offered
Window Replacement/Installation
Aspen Home Remodeling, LLC.
Oradell, NJGood Customer Service
Price Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Skylights
ZN Construction
Canton, CTPrice Transparency
Free assessment
Educational Website
Timely Service
Good Customer Service
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Doors & Windows
Albertson, NYGood Customer Service
Online product shopping
Price Transparency
Educational Website
Sunday availability
Free assessment
Free in-home or virtual consultation
Services Offered
Window Replacement/Installation
Wood Frames
Bay Windows
Double-Hung
Vinyl Frames
Paramount Gallery
West Hartford, CTEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Energy-Efficient Options
Glass Doors
Window Replacement/Installation
Custom Window Designs
Northern Windows Siding, Roofing and Insulation
Goshen, NYPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Flawless Glass & Mirror LLC
Holbrook, NYFree assessment
Price Transparency
Free in-home consultation
Good Customer Service
Owner-operated small business
Customized glass options
Educational Website
Services Offered
Glass Showers
Mirrors
Window Replacement/Installation
Frank Conforti Contracting
North Haledon, NJPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Window Repair
Skylights
Energy-Efficient Options
HDL Construction LLC — Windows replacement, Roofing, Roof service, Siding replacement, Chimney, Deck, Masonry
Hasbrouck Heights, NJSaturday and Sunday availability
Educational Website
Free in-home consultation
Price Transparency
Good Customer Service
Free assessment
24-hour emergency service
Services Offered
Window Replacement/Installation
Edge Remodeling, Inc.
Franklin Square, NYFree assessment
Free same-day estimates
Price Transparency
Labor warranties available
Family-owned and operated
Good Customer Service
Services Offered
Window Replacement/Installation
Parco Home Improvement Corp.
Franklin Square, NYPrice Transparency
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Vinyl Frames
Cityproof Soundproof Windows
Long Island City, NYOver 50,000 installations completed
Price Transparency
No-construction services available
Timely Service
Educational Website
Free assessment
Trademark soundproof Citiwindows
Good Customer Service
Services Offered
Window Replacement/Installation
Custom Window Designs
Energy-Efficient Options
Calculate how much you can expect to pay for window installation and replacement in Danbury, 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 Danbury Saves You Money
There are several perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the switch are the following:
- Save on power bills: Upgrading to energy-efficient windows lowers your energy bills by about 12% since you use less energy.
- Reduce your carbon footprint: You can reduce your indirect greenhouse gas emissions by about 12% when you install Energy Star certified windows. In Danbury, that’s about 147 pounds per year on average.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
- Protect your investment: If your home is on the older side, your windows are most likely outdated. Updating your windows can improve the insulation in your home and also help increase the value of your house if you decide to sell.
Estimated Cost of Window Replacement in Danbury
Each window installation company offers varying services and has varying prices depending on a few factors.
How Much Do New Windows Cost?
On average, Danbury homeowners can anticipate their window replacements to range from $250 to $1,200. The average cost sits at around $600. But prices vary considerably based on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also provide door replacements, which will add extra costs to your project.
It’s also worth noting that energy-efficient windows will almost always cost more upfront, but Energy Star predicts that switching out the windows on your Danbury 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. The amount of money you’ll save by installing energy-efficient windows depends on your local climate, energy rates and other factors unique to your home.
We recommend getting free quotes from multiple window installation companies to find the one that works best for you.
What Services do Window Installers Offer?
The first step when considering a window replacement is to figure out whether you need a full-frame or pocket installation.
A full-frame installation is a replacement of the full window. This service involves taking out the old window, the windowsill, and the exterior and interior trim. It also involves additional materials, such as insulation and drip edges, which raise the total cost of the project. Also worth noting: it’s not uncommon for homeowners to have to touch up the paint surrounding the window after a full-frame installation. Pocket installations are on the simpler end and won’t carry as large a bill, as they involve merely replacing the window within its existing frame. But if the frame has any damage, you may need a full-frame installation instead.
If you’re not sure which kind of window installation service you need, your installer can advise you. Typically, 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 Danbury
The EcoWatch Reviews team differs from other reviewers because we’re examining these companies through a sustainability lens. We have evaluated the best window replacement companies in Danbury mainly based on energy efficiency, as it’s what’s best for the environment and for you as a homeowner. Energy Star certified windows can reduce your power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
This one is pretty self-explanatory, but we’ve chosen to highlight window installers that serve the Danbury area so you can find the best window installation company near you.
Work Quality
We’re certain that you’re not looking for a company to do a shoddy job installing windows. We’ve vetted each company featured in our guide to ensure its technicians are well-qualified and that the company has gotten plenty of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed trends in recent online reviews to determine the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction might be the factor we place the most value on, as it reflects the quality of services across nearly every category, including cost, professionalism, quality of parts, warranty, quality of installation and more.
Cost
This one is a give-and-take: as with other services, cheap window installers may not provide the highest quality service. On the other hand, we want to ensure we’re highlighting companies that offer a variety 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 labor rank higher with EcoWatch.
Years of Experience
Due to Danbury’s climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of Danbury window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Danbury, CT Window Replacement FAQs
What is the typical cost to install new windows in a home?
The average cost to install a window ranges from $450 to $650. There are a variety of factors that influence the price, including how energy-efficient the windows are, the materials used in designing the windows, your property’s location, the number of windows, styles and sizes of windows and local labor costs.
What type of window is the best for energy efficiency?
A window’s energy efficiency is influenced by several factors, including the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient and are certified by the U.S. Department of Energy.
Can you install your own windows?
If you’re handy and have experience with similar home improvement projects, it’s possible to install your own windows. However, if you don’t have the time or experience, we recommend getting a professional to do it for you.
How often should you replace windows?
Windows usually last around 20 to 30 years, but anytime you see damage on your windows, it’s a good time to have them checked by an expert to see if they need any repairs or replacements.
Should I replace my windows all at the same time?
If you want to get more efficient windows and save money on energy costs, replacing all the windows at the same time is the only way to gain that benefit. However, if you have only a few windows that are broken or drafty, you can replace just those.