20 Best Window Companies in Killingly, CT (2024 Reviews)

When you need to upgrade your windows, our list of the top window installation companies can help you find the provider for you.

We analyzed all the top-rated window companies in Killingly and selected the best 20 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated February 01, 2024

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

Although green energy sources like wind and solar are important when it comes to decreasing your carbon footprint, improving your home’s energy efficiency can also have a big impact on home energy conservation. Poor windows can lower your home’s energy efficiency by up to 30%, according to the Department of Energy. In Killingly, that’s around $457 a year that you could save on your energy bills after making the switch.

Replacement windows improve your home’s insulation, not only making you and your family more comfortable during the summer and winter, but also saving you money and helping the environment.

Efficient windows are of particular importance in Killingly, where the temperature varies throughout the year. According to Energy Star, switching to energy-efficient windows can save the average homeowner up to $457 per year.

Best Availability

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

Best Window Installation & Replacement Companies in Killingly

The EcoWatch team examined many window installation companies in Killingly to find the best ones for our readers. The installers mentioned in this article passed our review standards for energy-efficient offerings as well as customer service, price, local expertise and beyond.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has 27 years of experience in the window installation industry, and it has proved to be one of the best companies in Killingly.

It 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 Windows

There are a wide variety of window types that Renewal by Andersen offers, some of which are Energy Star products. 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 Killingly?

Prices aren’t listed on Andersen’s 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 get a quote on the company’s website.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon 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. This company has 27 years of experience in the window installation industry, and it has proved to be one of the best companies in Killingly.

It 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 Windows

There are a wide variety of window types that Window World offers, some of which are Energy Star products. 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 Killingly?

Prices aren’t listed on Window World’s 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 get a quote on the company’s website.

Window Nation logo
FAST QUOTE
as little as 30 seconds
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon 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. This company has 16 years of experience in the window installation industry, and it has proved to be one of the best companies in Killingly.

It gives customers the opportunity to view products and to speak to a representative in person in its showrooms.

Energy Efficiency of Window Nation Windows

There are a wide variety of window types that Window Nation offers, some of which are Energy Star products. 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 Killingly?

Prices aren’t listed on Window Nation’s 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 get a quote on the company’s website.

Aeroseal Windows logo
FAST QUOTE
as little as 30 seconds
Best for Businesses

Aeroseal Windows

★★★★★
BBB Rating: A+
Locations: Regional
Founded: 1999
Pros:
  • Pros icon Many years of experience
  • Pros icon Great industry reputation
  • Pros icon Low number of customer complaints
  • Pros icon Manufactures products in-house
  • Pros icon Custom Designs
Cons:
  • Pros icon No lifetime warranty
  • Pros icon 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. This company has 23 years of experience in the window installation industry, and it has proved to be one of the best companies in Killingly.

It installs windows and doors at businesses across the Eastern U.S.

Energy Efficiency of Aeroseal Windows Windows

There are a wide variety of window types that Aeroseal Windows offers, some of which are Energy Star products. 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 Killingly?

Prices aren’t listed on Aeroseal’s website, but it provides high-quality windows at a competitive price point. If you’d like more accurate pricing information, you can get a quote on the company’s website.

We aim to remain unbiased and transparent by including pros and cons for every provider. Additionally, any partnerships do not affect our rankings.

More Window Companies in Killingly

Renewal by Andersen Window Replacement

Smithfield, RI
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Bay Windows
  • Service icon Andersen
  • Service icon Custom Window Designs
  • Service icon Sliding Glass Doors
  • Service icon Vinyl Frames
  • Service icon Energy-Efficient Options
  • Service icon Window Install & Replacement

Website: https://windowsrhodeisland.com/
Address: 10 Reservoir Rd, Smithfield, RI 02917
Phone: (401) 264-0052

Window World of Rhode Island

Warwick, RI
4.3
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Window Install & Replacement
  • Service icon Sliding Glass Doors

Website: https://www.windowworldri.com/
Address: 380 Jefferson Blvd, Warwick, RI 02886
Phone: (401) 336-6815

Window Nation

Norwood, MA
4.5
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass Doors
  • Service icon Vinyl Frames
  • Service icon Bay Windows

Website: https://www.windownation.com/boston-showroom/
Address: 575 University Ave, Norwood, MA 02062
Phone: (781) 619-8591

The Window Source RI

Smithfield, RI
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Window Install & Replacement
  • Service icon Sliding Glass Doors
  • Service icon Bay Windows
  • Service icon Glass Doors

Website: http://www.windowsourceri.com/
Address: 127 Dean Ave, Smithfield, RI 02917
Phone: (401) 270-0160

Kent County Glass

Coventry, RI
4.6
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Mirrors
  • Service icon Window Install & Replacement
  • Service icon Storm Windows
  • Service icon Screen Repair
  • Service icon Vinyl Frames
  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Window Repair

Website: http://www.kentcountyglassinc.com/
Address: 787 Washington St, Coventry, RI 02816
Phone: (401) 821-7889

Krystal Glass & Door Co

Smithfield, RI
4.6
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Mirrors
  • Service icon Glass Showers
  • Service icon Sliding Glass Doors
  • Service icon Window Install & Replacement
  • Service icon Window Repair
  • Service icon Glass Doors
  • Service icon Commercial Windows
  • Service icon Skylights
  • Service icon Aluminum Frames
  • Service icon Custom Glass
  • Service icon Tempered Glass
  • Service icon Wood Frames
  • Service icon Glass Repair

Website: http://krystalglassri.com/
Address: 9 Rocky Hill Rd Unit B, Smithfield, RI 02917
Phone: (401) 231-1600

Couto Construction

Warwick, RI
4.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Window Repair
  • Service icon Window Install & Replacement

Website: https://www.coutoconstruction.com/
Address: 895 Post Rd, Warwick, RI 02888
Phone: (401) 307-5699

CARRIER ROOFING SIDING & WINDOWS

Webster, MA
2.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Window Repair
  • Service icon Commercial Windows

Website: http://www.carrierrsw.com/
Address: 1189 School St, Webster, MA 01570
Phone: (508) 287-0288

United Better Homes - Roofing, Solar & Windows

Central Falls, RI
4.9
★★★★★
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Bay Windows
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Full-Service Installations
  • Service icon Window Install & Replacement

Website: https://www.unitedbetterhomes.com/
Address: 535 Pine St, Central Falls, RI 02863
Phone: (401) 274-0111

Venture Window LLC

Cranston, RI
4.4
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Storm Doors
  • Service icon Skylights
  • Service icon Custom Window Designs

Website: https://venturewindow.com/
Address: 33 Freeway Dr, Cranston, RI 02920
Phone: (401) 273-3600

Closet & Storage Systems

Auburn, MA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Mirrors
  • Service icon Glass Showers
  • Service icon Window Install & Replacement

Website: http://www.closetandstoragesys.com/
Address: 81 Pinehurst Ave, Auburn, MA 01501
Phone: (508) 832-4044

Rescom Exteriors, Inc

Auburn, MA
4.4
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Fiberglass Frames
  • Service icon Triple Pane Glass
  • Service icon Bay Windows
  • Service icon Vinyl Frames
  • Service icon Window Install & Replacement
  • Service icon Double-Hung

Website: https://www.iwantnewwindows.com/
Address: 714 Southbridge St, Auburn, MA 01501
Phone: (508) 832-5202

Tri-State Construction Co

Worcester, MA
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Window Repair

Website: http://tristateconstruction.org/
Address: 5 Brussels St BLDG B, Worcester, MA 01610
Phone: (508) 751-8585

N.E. Building & Restoration LLC

Attleboro, MA
5
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Vinyl Frames
  • Service icon Window Install & Replacement
  • Service icon Commercial Windows
  • Service icon Window Repair

Website: https://nebrpros.com/
Address: 141 Downing Dr, Attleboro, MA 02703
Phone: (508) 202-1884

A-1 Wholesale Window Co

Worcester, MA
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Commercial Windows
  • Service icon Storm Doors
  • Service icon Window Install & Replacement
  • Service icon Screen Repair
  • Service icon Window Repair

Website: https://a1windowsandsiding.com/
Address: 12 Brussels St, Worcester, MA 01610
Phone: (508) 753-3632

Pella Windows & Doors of Seekonk

Seekonk, MA
4.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Fiberglass Frames
  • Service icon Commercial Windows
  • Service icon Storm Doors
  • Service icon Window Install & Replacement
  • Service icon Window Repair
  • Service icon Bay Windows
  • Service icon Glass Doors
  • Service icon Pella
  • Service icon Double-Hung
  • Service icon Sliding Glass Doors

Website: https://www.pellabranch.com/southern-new-england/showrooms/seekonk/
Address: 20 Commerce Way Suite 11, Seekonk, MA 02771
Phone: (508) 336-6766

Home Outlet

Auburn, MA
4.4
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Install & Replacement
  • Service icon Mirrors
  • Service icon Glass Showers
  • Service icon Vinyl Frames
  • Service icon Aluminum Frames

Website: http://www.homeoutlet.com/store/home-outlet-auburn-ma
Address: 77 Southbridge St, Auburn, MA 01501
Phone: (508) 791-9201

Affordable Windows and Doors Co., Inc.

Leicester, MA
4.6
★★★★★

Services Offered

  • Service icon Bay Windows
  • Service icon Window Install & Replacement
  • Service icon Storm Doors
  • Service icon Marvin
  • Service icon Roof Windows
  • Service icon Skylights
  • Service icon Velux

Website: http://www.affordablewindows.com/
Address: 1152 Main St, Leicester, MA 01524
Phone: (508) 892-9292

Amaral Services LLC

Swansea, MA
4.9
★★★★★
  • Pros icon Educational Website

Services Offered

  • Service icon Window Install & Replacement

Website: http://amaralservicesllc.com/
Address: 2135 US-6, Swansea, MA 02777
Phone: (401) 864-5730

Jancon Exteriors

Franklin, MA
4.4
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Commercial Windows
  • Service icon Window Install & Replacement
  • Service icon Full-Service Installations
  • Service icon Glass Showers
  • Service icon Residential Windows

Website: https://www.janconexteriors.com/
Address: 20 Grove St # 3, Franklin, MA 02038
Phone: (508) 520-3935
Killingly Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Killingly, CT using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

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 Killingly Saves You Money

There are quite a few perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the switch include the following:

  • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
  • Protect your investment: If your home is on the older side, your windows are most likely outdated. 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: Decreasing the amount of energy you use also lowers your carbon emissions. You could reduce it by about 147 pounds.
  • Save money on electricity bills: Upgrading to energy-efficient windows lowers your energy bills by about 12% because you need less energy.

Estimated Cost of Window Replacement in Killingly

When looking into window installation, each company provides varying services and costs. Let’s look at some typical costs and services.

How Much Do New Windows Cost?

According to our research, the average cost to install a single window is around $600. However, window replacement costs can range from $200 to $1,200 for each window. But costs differ considerably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also offer door replacements, which carry a higher price tag.

It’s important to remember that windows with the best efficiency may cost more initially but can save you hundreds of dollars by lowering your energy bills. Investing in Energy Star certified windows can save Killingly homeowners $457+ a year when 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 typically the most expensive, although it depends on whether they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are shown to be more efficient.

What Services do Window Installers Offer?

In general, there are two types of window replacement services companies offer: full-frame and pocket installations.

A full-frame installation replaces the entire window, such as the windowsill, frame, trim and the window panes. Because this type of installation requires more time, it will cost more than a pocket installation. Pocket installations are on the simpler end and won’t cost as much because they entail merely replacing the window within its existing frame. But if the frame has any damage, you should opt for a full-frame installation instead.

If you’re hiring a reputable window installation company, your company will be able to recommend the best type for your project. In Killingly, the decision will mostly be influenced by how much damage there is currently and the condition of your existing frames.

Best Availability

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

How We Choose the Best Window Installers in Killingly

EcoWatch differs from most reviewers because we evaluate these companies through a sustainability lens. We’ve evaluated the best window installation companies in Killingly primarily based on energy efficiency, as it’s what’s best for the environment and for you as a homeowner. Energy Star certified windows have been shown to cut your electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:

Service Area

Since this is a guide for Killingly, we only included companies that serve the city. There are certainly other reputable providers that didn’t make our list because of the low odds that they would serve the average homeowner in Killingly.

Work Quality

When selecting new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand of window you opt for. We do give window installers higher marks if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent online reviews to find the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction may be the factor we place the most value on, as it indicates the quality of services across most other categories, including quality of installation, professionalism, cost, quality of parts, warranty and more.

Cost

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

Warranty

Protecting your investment in new windows is important to many homeowners. That’s why window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.

Years of Experience

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

Killingly, CT Window Replacement FAQs

What is the typical cost to install windows?

The typical cost to replace a window can range between $450 and $650. There are several factors that affect how much it costs, including how energy-efficient the windows are, local labor costs, your property’s location, the number of windows, the materials used in designing the windows and styles and sizes of windows.

What are the most common types of replacement windows?

There are several different kinds of windows you can get for your home, including bay windows, transom windows, casement windows, picture windows, double-hung and single-hung windows, awning windows and slider windows.

Do you really have to use a window installation company?

You should hire a window installation professional whenever you need to upgrade your windows. Installing windows is a complicated process that can take a lot of time, so it’s best left to the professionals.

When is it time to replace your windows?

Windows generally have a lifespan of 20 to 30 years, but anytime you see damage on your windows, it’s a good idea to have them checked by an expert to see if they need any repairs or replacements.

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