20 Best Window Companies in Berlin, CT (2025 Reviews)
If you’re looking to upgrade to new windows, our list of the best window installation companies can help.
We analyzed all the top-rated window companies in Berlin 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 damaged windows, windows play a crucial role in conserving your home's electricity. When it’s the middle of winter, your outdated and leaky windows could be making your home harder to heat and costing you more in power bills.
That’s also bad news for the environment because the additional energy used by damaged windows increases your carbon footprint.
So if you’re building a new home, renovating or changing out old windows in Berlin, this guide is the best place to get started.
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 Berlin
The EcoWatch team assessed dozens of installers in Berlin to find the best window installation companies for our readers. The installers in this article passed our review standards for energy-efficient offerings as well as customer service, local expertise, price and beyond.

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 offers windows expertise in Berlin. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has over 27 years of experience in the windows industry, and it currently provides services to 200 locations nationwide. Hundreds of positive reviews from customers online back the company's reputation.
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 is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Window World representative when inquiring about services.
How much does Window World cost in Berlin?Pricing details are not available on Window World’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to receive a free quote from the company.

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 offers the best availability in Berlin. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has over 27 years of experience in the windows industry, and it currently provides services to nearly every state except Mississippi and West Virginia. Hundreds of positive reviews from customers online back the company's reputation.
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 is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Berlin?Pricing details are not available on Andersen’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to get more accurate pricing information is to receive a free quote from the company.

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 offers the best window installation for businesses in Berlin. It's 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 over 23 years of experience in the windows industry, and it currently provides services to 13 states and Washington D.C. Hundreds of positive reviews from customers online back the company's reputation.
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 is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Aeroseal representative when inquiring about services.
How much does Aeroseal Windows cost in Berlin?Pricing details are not available on Aeroseal’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. The best way to get more accurate pricing information is to receive a free quote from the company.

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 offers the best residential windows in Berlin. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has over 16 years of experience in the windows industry, and it currently provides services to residents within 75 miles of its showrooms, which are in 13 states. Hundreds of positive reviews from customers online back the company's reputation.
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 is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Window Nation representative when inquiring about services.
How much does Window Nation cost in Berlin?Pricing details are not available on Window Nation’s website, as the cost of window installment differs based on how many and what type(s) of windows you need. However, 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. The best way to get more accurate pricing information is to receive a free quote from the company.
We’ve recommended installers with good reputations, but bear in mind that some national companies have independently owned locations in Berlin, so the quality of service may differ depending on your local crew. We have tried to be unbiased and transparent by including pros and cons for each company reviewed.
More Window Companies in Berlin
Renewal by Andersen Window Replacement
Middletown, CTFree assessment
Price Transparency
Good Customer Service
Services Offered
Bay Windows
Vinyl Frames
Custom Window Designs
Energy-Efficient Options
Double-Hung
Window Replacement/Installation
Glass Doors
Power Home Remodeling
Trumbull, CTPrice Transparency
Timely Service
Good Customer Service
Free assessment
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Window Nation
Wallingford, CTFree assessment
Educational Website
Price Transparency
Services Offered
Double-Hung
Bay Windows
Glass Doors
Window Replacement/Installation
Custom Window Designs
Energy-Efficient Options
Paramount Gallery
West Hartford, CTEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Custom Window Designs
Glass Doors
Window Replacement/Installation
Energy-Efficient Options
ZN Construction
Canton, CTEducational Website
Timely Service
Free assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Big Dawg Home Improvements
South Windsor, CTGood Customer Service
Price Transparency
Free assessment
Timely Service
Services Offered
Window Repair
Window Replacement/Installation
Energy-Efficient Options
Skylights
Bert Falsetti's Home Improvement LLC
Shelton, CTServices Offered
Energy-Efficient Options
Window Replacement/Installation
Double-Hung
Vinyl Frames
Budget Blinds of Enfield and Hartford
Somers, CTGood Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Custom Window Designs
Window Replacement/Installation
Window Depot USA of Southern CT
Trumbull, CTPrice Transparency
Timely Service
Free assessment
Good Customer Service
Educational Website
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Vinyl Frames
Bay Windows
Double-Hung
Triple Pane Glass
Kubala Home Improvement
Ludlow, MAFree assessment
Price Transparency
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
Calvary Remodeling
Mystic, CTEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
United Home Experts
Norwalk, CTPrice Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Fiberglass Frames
Flawless Glass & Mirror LLC
Holbrook, NYFree in-home consultation
Owner-operated small business
Customized glass options
Educational Website
Free assessment
Good Customer Service
Price Transparency
Services Offered
Glass Showers
Window Replacement/Installation
Mirrors
Putnam Windows Inc.
Cold Spring, NYFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Vinyl Frames
Wood Frames
Glass Doors
Greenwich Windows Replacement
Greenwich, CTFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Double-Hung
Bay Windows
Window Replacement/Installation
Nu-Face Home Improvements
Berlin, CTEducational Website
Free assessment
Timely Service
Good Customer Service
Price Transparency
Services Offered
Energy-Efficient Options
Glass Doors
Double-Hung
Glass Showers
Window Replacement/Installation
Advanced Window Systems LLC
Cromwell, CTEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Glass Showers
Glass Doors
Window Replacement/Installation
Double-Hung
Bay Windows
Bencar Building Systems LLC
Wallingford, CTGood Customer Service
Services Offered
Window Replacement/Installation
Dresser Hull Lumber & Building Supply Company
Lee, MAFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
CARRIER ROOFING SIDING & WINDOWS
Webster, MAEducational Website
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Berlin, 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 Berlin Saves You Money
By switching to energy-efficient windows, you can benefit in several ways, such as:
- Protect your investment: If you have an older home, your windows are most likely in need of replacement. Updating your windows can make your home more comfortable and also help raise the value of your property if you decide to sell.
- Save on electricity bills: The Department of Energy estimates that heat gained or lost via windows makes up around 25-30% of household energy use. Switching to energy-efficient windows can help decrease that amount, which helps you save some money on your bills.
- Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
- Reduce your carbon footprint: Reducing the amount of energy you use also lowers your carbon emissions. You could reduce it by about 147 pounds.
Estimated Cost of Window Replacement in Berlin
When looking into window installation, each company offers different services and costs. Let’s go over some average costs and services.
How Much Do New Windows Cost?
The national average cost to install a single window is about $600 but can range anywhere from $200 to $1,200. But costs will differ significantly depending on the quality of your products, the number of windows you need, your location and the current condition of your home. Many window companies also offer replacement door installations and other add-ons like coating, baths, shutters and more. These extra services will increase your overall project costs.
It’s important to remember that windows with the best efficiency may cost more initially but can save you hundreds of dollars via returns on your energy bills. Investing in Energy Star certified windows can save Berlin homeowners $446+ a year when replacing single-pane windows.
Something else that influences the overall cost is the material of the frame you select. Aluminum frames are typically the least expensive and are sturdy and light, but they provide 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?
The first step of a window installation is to figure out whether you should get a full-frame or pocket installation.
A full-frame installation replaces the entire window, such as the sill, frame, trim and the window panes. As this kind of installation requires more time, it will cost more than a pocket installation. A pocket installation entails installing a new window within the old frame. This means instead of taking out the whole unit and reinstalling it, the installer will just put the replacement window (also called a retrofit or insert window) into the frame.
Your window installation company should be able to help you figure out which type of installation you should get.
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 Berlin
EcoWatch reviews differ from other reviews because we’re examining these companies through a sustainability lens. We’ve evaluated the best window installation companies in Berlin primarily based on their energy efficient offerings, as it’s what’s best for the environment and for you as a homeowner. Energy-efficient windows have been shown to lower energy 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 Berlin, we only included companies that provide services to the city. There are certainly reputable providers that didn’t make the cut because they wouldn’t be able to serve homeowners in Berlin.
Work Quality
When installing new windows, the quality and range 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 more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
Customer feedback is another super important review factor. If the majority of customers don’t have nice things to say about their service from a certain window installation company, you won’t see it featured on EcoWatch.
Cost
Cheaper windows certainly don’t mean better windows, but we know many of our readers want to keep costs as low as possible. When analyzing the prices of providers, we gave higher points to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies with lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Due to Berlin’s climate, homeowners will want to mitigate water damage, low efficiency and rot. We factored in local experience to reflect the ability of Berlin window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Berlin, CT Window Replacement FAQs
How much should a window install cost?
The national average cost of installing one window is around $600 but can range from $200 to $1,200, based on a variety of factors. The price is usually influenced by the size of the window, the type and material of the window and the location of your property. Also, remember that energy-efficient windows may cost more initially but can save you hundreds of dollars a year in energy bills.
What are the different types of windows?
The most common types of windows for homes include: bay windows, double-hung and single-hung windows, casement windows, slider windows, awning windows, picture windows and transom windows.
What do window installers do?
Window installation professionals visit your property to remove your old windows and replace them with new ones. Some providers install products sold by other companies, whereas others are both manufacturers and installation companies combined. The installer will also clean up after the installation is finished.
What time of year is a good time to replace my windows?
Although you can install windows any time of year, warmer weather is generally better for replacing windows. Additionally, it shouldn’t be raining, since rain can make the installation more difficult.
Should I replace my windows all at once?
If you’re upgrading your windows because of energy-efficiency, replacing all your windows at the same time is the only way to gain that benefit. On the other hand, if you have only a few windows that are broken or leaky, you can replace just those.