20 Best Window Companies in Guilford, CT (2024 Reviews)
Are you thinking of upgrading your windows? Our guide to the top window installation companies can help you pick the right one for you.
We analyzed all the top-rated window companies in Guilford 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
The EcoWatch team is all about helping Guilford homeowners find eco-conscious solutions for their homes. Traditional or damaged windows could lead to having higher electricity bills during the winter or summer months.
That’s not great for either your bank account or the environment, but one of the top window installation companies can help you with that.
Because windows have such a large impact on your home, picking the right company for you is a big decision to make. That’s why the EcoWatch team has made this list of the top window installation companies, so you can more easily make an informed decision.
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 Guilford
The EcoWatch team evaluated many window installation companies across Guilford to narrow our list down to the top ones. We assessed the installers based on their energy-efficient offerings, coverage area, local experience, customer service, 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 Guilford. This company has been in business since 1995 and 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 is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Window World representative when inquiring about services.
How much does Window World cost in Guilford?Prices are not available on Window World’s website because the cost of window replacement depends 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. If you’d like more accurate pricing information, you can ask for 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 Guilford. This company has been in business since 1995 and 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 is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Guilford?Prices are not available on Andersen’s website because the cost of window replacement depends 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. If you’d like more accurate pricing information, you can ask for 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 Guilford. This company has been in business since 1999 and 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 is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Aeroseal representative when inquiring about services.
How much does Aeroseal Windows cost in Guilford?Prices are not available on Aeroseal’s website because the cost of window replacement depends on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. If you’d like more accurate pricing information, you can ask for 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 Guilford. This company has been in business since 2006 and 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 is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so make sure to mention that you want energy-efficient windows to your Window Nation representative when inquiring about services.
How much does Window Nation cost in Guilford?Prices are not available on Window Nation’s website because the cost of window replacement depends 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. If you’d like more accurate pricing information, you can ask for a quote on the company’s website.
We try to stay unbiased and transparent by describing pros and cons for each company we review. Additionally, our rankings are not affected by any partnerships.
More Window Companies in Guilford
Renewal by Andersen - Branford
Branford, CTFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Glass Doors
Skylights
Double-Hung
Bay Windows
Power Home Remodeling
Trumbull, CTPrice Transparency
Free assessment
Timely Service
Good Customer Service
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Window Nation
Wallingford, CTFree assessment
Educational Website
Price Transparency
Services Offered
Glass Doors
Custom Window Designs
Double-Hung
Window Replacement/Installation
Energy-Efficient Options
Bay Windows
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, CTFree assessment
Educational Website
Price Transparency
Good Customer Service
Timely Service
Services Offered
Window Replacement/Installation
Vinyl Frames
Glass Doors
Energy-Efficient Options
Bay Windows
Double-Hung
Triple Pane Glass
Paramount Gallery
West Hartford, CTFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Glass Doors
Custom Window Designs
ZN Construction
Canton, CTEducational Website
Price Transparency
Timely Service
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Big Dawg Home Improvements
South Windsor, CTFree assessment
Timely Service
Price Transparency
Good Customer Service
Services Offered
Skylights
Window Repair
Window Replacement/Installation
Energy-Efficient Options
Calvary Remodeling
Mystic, CTFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
United Home Experts
Norwalk, CTFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Fiberglass Frames
Flawless Glass & Mirror LLC
Holbrook, NYEducational Website
Good Customer Service
Free assessment
Customized glass options
Free in-home consultation
Owner-operated small business
Price Transparency
Services Offered
Window Replacement/Installation
Glass Showers
Mirrors
Budget Blinds of Enfield and Hartford
Somers, CTEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Custom Window Designs
Window Replacement/Installation
Greenwich Windows Replacement
Greenwich, CTGood Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Double-Hung
Bay Windows
Kubala Home Improvement
Ludlow, MAPrice Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Bencar Building Systems LLC
Wallingford, CTGood Customer Service
Services Offered
Window Replacement/Installation
Advanced Window Systems LLC
Cromwell, CTGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Bay Windows
Double-Hung
Glass Showers
Nu-Face Home Improvements
Berlin, CTEducational Website
Timely Service
Price Transparency
Good Customer Service
Free assessment
Services Offered
Glass Showers
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Double-Hung
Smithtown Window Replacement and Doors
Smithtown, NYEducational Website
Price Transparency
Weekend availability
Good Customer Service
Free assessment
Energy-efficient windows and doors
Family-owned and operated
Services Offered
Fiberglass Frames
Storm/Impact Windows
Vinyl Frames
Tempered Glass
Triple Pane Glass
Window Replacement/Installation
Bay Windows
Glass Showers
Custom Window Designs
Energy-Efficient Options
Window Repair
Double-Hung
Glass Doors
Wood Frames
Metal Frames
Mr. Handyman of Huntington and Smithtown
East Northport, NYFree assessment
Educational Website
Timely Service
Price Transparency
Good Customer Service
Services Offered
Window Repair
Bay Windows
Window Replacement/Installation
Homestead Window Treatments
Huntington Station, NYEducational Website
Online appointment scheduling
Price Transparency
Saturday availability
Good Customer Service
Free assessment
Family-owned and operated
Services Offered
Custom Window Designs
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Guilford, 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 Guilford Saves You Money
Upgrading to energy-efficient windows can help improve the comfort of your home and help you save on power bills. Here's more information on how upgrading your windows could help you:
- Save on power bills: Upgrading to energy-efficient windows reduces your energy bills by about 12% because you need less energy.
- Decrease your carbon footprint: Reducing the amount of energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by about 147 pounds.
- Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help reduce damage from the sun's UV rays to your floors, carpets and furniture.
- Protect your investment: Upgrading and repairing your windows is an important part of maintaining your property and its value, particularly if you have an older home.
Estimated Cost of Window Replacement in Guilford
When researching window installation, each company offers varying services and costs. Let’s look at some average costs and services.
How Much Do New Windows Cost?
According to our market research, the national average cost of replacing a single window is about $600. However, window replacement costs can range from $200 to $1,200 per window. Costs will vary considerably based on your location, the quality of your products, the current condition of your home and the number of windows you need. Many window companies also offer replacement door installations and other add-ons like shutters, coating, baths and more. Additional services will increase your overall project costs.
With windows, efficiency is one of the most important factors for many homeowners. Efficient windows may cost more upfront, but by increasing the efficiency of your home — particularly during the summer and winter — they can give you decades of energy savings. According to Energy Star, buying certified energy-efficient windows can save Guilford homeowners $420+ a year after replacing single-pane windows.
Costs will also vary based on the material of your frame. Aluminum frames are the least expensive. They’re sturdy, light and maintenance-free, but offer poor insulation. Vinyl frames are somewhat expensive and offer good insulation. Composite frames made from wood fibers encased in plastic also offer good insulation and are moderately expensive. Wood frames cost the most and are the most in-demand. They’re also aesthetically pleasing and offer decent insulation for your home.
What Services do Window Installers Offer?
The first thing to ask yourself when planning a window installation is: Should you get a full-frame installation or a pocket installation?
Full-frame installations require replacing the whole window — the sill, frame, trim and all. These are typically done when you want a different style for your windows or when it has a great amount of damage. Full-frame installations are more comprehensive and will increase overall costs. Pocket installations (or retrofits) involve replacing a window within the existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any damage or rot, you will most likely need a full-frame installation instead.
If you’re still debating which type of installation to get, you can consult with your provider and get their advice. The choice mostly is influenced by how old the frames are and if there’s any damage.
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 Guilford
EcoWatch reviews are different from other reviews because we assess these companies through a sustainability lens. Along with energy efficiency, we assessed several window installers in Guilford and assigned rankings using the following methodology:
Service Area
This one is self-explanatory, but we’ve chosen to highlight window installers that serve Guilford so you can find the best window installation company near you.
Work Quality
When selecting 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 choose. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent customer feedback 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 reflects the quality of services across most other categories, including professionalism, cost, quality of parts, warranty, quality of installation 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 providers’ prices, 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. That’s why window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Due to Guilford’s climate, homeowners need to be wary of low efficiency, water damage and rot. We factored in local experience to reflect the ability of Guilford window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Guilford, CT Window Replacement FAQs
How much should a window install cost?
The average cost of installing one window can range from $450 to $650. There are several factors that affect how much it costs, including local labor costs, how energy-efficient the windows are, the number of windows, your property’s location, the materials used in designing the windows and styles and sizes of windows.
What are the kinds of windows?
There are various types of windows you can get for your house, including casement windows, bay windows, picture windows, awning windows, slider windows, double-hung and single-hung windows and transom windows.
When should I use a window installation company?
Unless you’re handy and have the time to replace your own windows, we recommend hiring a professional installer. The process of installing windows is complex and can take anywhere from four to six hours for a single window. Although it’s tempting to try to save some money by doing it yourself, hiring a company is a faster, more efficient and safer alternative.
How do you know it’s time to replace your windows?
Windows usually last about 20 to 30 years, but anytime you notice damage on your windows, it’s a good time to have an expert take a look at them to see if they need any repairs or replacements.
Should I replace my windows all at the same time?
If you’re upgrading your windows to save on your energy bills, replacing all the windows at once is the only way to gain that benefit. On the other hand, if you have just one or two windows that are broken or drafty, you can replace just those.