20 Best Window Companies in Freeport, IL (2025 Reviews)
If you’re thinking of getting new windows, our guide to the best window installation companies can help.
We analyzed all the top-rated window companies in Freeport 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 reducing your carbon footprint, improving your house’s efficiency can also have a large impact on home energy conservation. Potential leaks or drafts from your windows can make your home uncomfortable in the summer or winter.
That’s not great for either your bank account or the environment, but one of the top window installation companies can help with that.
So if you’re constructing a new home, renovating or updating your windows in Freeport, this 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 Freeport
The EcoWatch team evaluated many window providers across Freeport to narrow our list down to the top ones. We assessed the installers on energy-efficient offerings, price, customer service, coverage area, local experience 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 has windows expertise in Freeport. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This provider has 27 years of experience in the windows business, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by several positive reviews on customer review websites.
If you’re looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, Window World may be the company for you.
Energy Efficiency of Window World WindowsThere are a wide range of window types available from Window World, 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 Freeport?Window World doesn’t have any cost information available on its website, but it's known for offering some of the most affordable window installations around. The best way to know for sure 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 has the best availability in Freeport. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This provider has 27 years of experience in the windows business, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by several positive reviews on customer review websites.
If you’re looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started, Andersen may be the company for you.
Energy Efficiency of Renewal by Andersen WindowsThere are a wide range of window types available from Renewal by Andersen, 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 Freeport?Andersen doesn’t have any cost information available 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. The best way to know for sure 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 has the best residential windows in Freeport. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. This provider has 16 years of experience in the windows business, and it has established itself as one of the most reputable companies in the business. Its reputation is backed by several positive reviews on customer review websites.
If you’re looking for a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms, Window Nation may be the company for you.
Energy Efficiency of Window Nation WindowsThere are a wide range of window types available from Window Nation, 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 Freeport?Window Nation doesn’t have any cost information available 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. The best way to know for sure is to receive a free quote from the company.
We strive to stay unbiased and transparent by describing pros and cons for each installer. Additionally, any partnerships do not influence our reviews.
More Window Companies in Freeport
Renewal by Andersen
Madison, WIPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Custom Window Designs
Double-Hung
Glass Doors
Bay Windows
Window Replacement/Installation
Skylights
Champion Replacement Windows of Madison
Madison, WIPrice Transparency
Free assessment
Limited lifetime warranty
Good Customer Service
Transparent pricing and no hidden fees
All products made or sourced in the USA
Services Offered
Double-Hung
Bay Windows
Window Replacement/Installation
Glass Doors
Huskie Exteriors
Rockford, ILPrice Transparency
Good Customer Service
Free assessment
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Exceptional Exteriors LLC
Stoughton, WIPrice Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Wisco Roofing and Windows
Janesville, WIEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Glass Doors
Energy-Efficient Options
Window Replacement/Installation
Infinity Exteriors
Madison, WI3D home visualizer
Price Transparency
Educational Website
Good Customer Service
Lifetime workmanship warranty
Free in-home consultations and estimates
Free assessment
Services Offered
Bay Windows
Window Replacement/Installation
Wood Frames
Energy-Efficient Options
City Glass Company, Inc.
Janesville, WIEducational Website
Services Offered
Glass Doors
Glass Showers
Mirrors
Window Replacement/Installation
Soberg Window & Door Company
Walworth, WIEducational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Dubuque Glass Company
Dubuque, IAEducational Website
Services Offered
Tempered Glass
Energy-Efficient Options
Mirrors
Glass Showers
Screen Repair
Window Replacement/Installation
Glass Doors
Window Repair
Pella Windows & Doors of Dubuque
Dubuque, IAGood Customer Service
Free assessment
Educational Website
Services Offered
Bay Windows
Double-Hung
Window Replacement/Installation
Glass Doors
Epic Painting & Exteriors
Madison, WIEnergy-efficient
Educational Website
Good Customer Service
Price Transparency
Online home visualizer
Full-service exterior remodeling
Services Offered
Window Replacement/Installation
American Quality Windows Inc
Sterling, ILFree assessment
Services Offered
Double-Hung
Vinyl Frames
Window Replacement/Installation
Energy-Efficient Options
Pella Window and Door Showroom of Rockford, IL
Rockford, ILEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Double-Hung
Kobyco Inc
Loves Park, ILPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Bay Windows
Vinyl Frames
Window Replacement/Installation
Custom Window Designs
Glass Doors
Double-Hung
Martin Glass Company
Madison, WIFree assessment
Services Offered
Mirrors
Tempered Glass
Storm/Impact Windows
Screen Repair
Glass Showers
Glass Doors
Window Repair
Energy-Efficient Options
Window Replacement/Installation
Pella Windows & Doors of Mendota
Mendota, ILFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Glass Doors
Double-Hung
Window Replacement/Installation
Window World of Rockford
Loves Park, ILGood Customer Service
Timely Service
Free assessment
Educational Website
Services Offered
Custom Window Designs
Energy-Efficient Options
Window Replacement/Installation
Bay Windows
Double-Hung
Glass Doors
Pella Windows & Doors of Madison
Madison, WIGood Customer Service
Educational Website
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Double-Hung
Custom Window Designs
Wood Frames
Mad City Windows & Baths
Madison, WIEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Vinyl Frames
Double-Hung
Glass Showers
Bay Windows
Brunke Glass & Window Co Inc
Madison, WIServices Offered
Mirrors
Energy-Efficient Options
Tempered Glass
Window Replacement/Installation
Screen Repair
Glass Showers
Calculate how much you can expect to pay for window installation and replacement in Freeport, IL 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 Freeport Saves You Money
Switching to energy-efficient windows can improve the comfort of your home and help you save on energy bills. Here are more details about how switching out your windows could help you:
- Decrease your carbon footprint: In Freeport, you can cut your indirect greenhouse gas emissions by about 449 pounds per year when you install energy-efficient windows.
- Save on power bills: Because energy-efficient windows decrease the amount of energy used to heat or cool your home, the switch can help you save around $326 annually on your energy bills in Freeport.
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes tend to have windows that are outdated, leaky or potentially even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.
- Protect your valuables from fading: When you switch to energy-efficient windows that have low-emissivity coatings, your floors, carpets and furniture will be protected from fading due to their ability to filter out damaging UV rays.
Estimated Cost of Window Replacement in Freeport
Windows come in varying styles, shapes and purposes, so costs and services will differ considerably based on your project. Below, we detail the typical cost and services that you’ll find from window replacement companies.
How Much Do New Windows Cost?
The national average cost to replace one window is about $600 but can range from $200 to $1,200. This is due to the fact that the cost of window installations depend on a variety of factors specific to your home, such as the size, material and number of windows you need to replace, as well as the location of your property.
With windows, efficiency is one of the most important factors for many homeowners. High efficiency windows may cost more off the bat, but by increasing the efficiency of your home — especially during the summer and winter — they can give you many years of energy savings. According to Energy Star, buying certified energy-efficient windows can save Freeport homeowners $326+ a year after replacing single-pane windows.
Asking for free quotes from multiple installers is the best way to find out which one will work best for your budget.
What Services do Window Installers Offer?
The first step when planning a window installation is to clarify whether you should get a full-frame or pocket installation.
A full-frame installation is a replacement of the total window. This service involves taking out the old window, the sill, and the exterior and interior trim. It also involves additional materials, including insulation and drip edges, which raise the total cost of the project. It’s also worth noting that it’s not uncommon for homeowners to have to touch up the paint surrounding the window after a full-frame installation. Pocket installations (also known as retrofits) are when you replace a window while leaving the existing frame. Pocket installations are simpler and will be less expensive, but you can’t do this type of installment if you have any pre-existing rot or water damage.
If you’re not sure which kind of window installation service you should get, your installer should be able to assist you. Typically, the choice is influenced by 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 Freeport
In our search to make your home improvements easier and more eco-friendly in Freeport, EcoWatch assessed many companies before deciding on these. Along with energy efficiency, we analyzed each installer and assigned rankings based on the following methodology:
Service Area
This one is self-explanatory, but we’ve chosen to highlight window installation companies that serve the Freeport area so you can find a quality window installation company near you.
Work Quality
When installing new windows, the quality and variety of services can often play just as important of a role in overall efficiency and performance as the brand 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
Customer feedback is another super important review factor. If most customers don’t have nice feedback about their experience with a certain window installation company, you won’t see it featured on EcoWatch.
Cost
Cheaper windows don’t necessarily 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 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 that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Because of Freeport’s climate, homeowners need to be wary of low efficiency, water damage and rot. We factored in local experience to reflect the ability of Freeport window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Freeport, IL Window Replacement FAQs
What is the average cost to install new windows?
The average cost to install a window can range from $450 to $650. There are several factors that affect the cost, including your property’s location, how energy-efficient the windows are, styles and sizes of windows, the materials used in designing the windows, the number of windows and local labor costs.
Which kind of window should I get?
Generally, double-pane windows will be more efficient than single-pane windows and windows that don’t open will be more efficient than windows that do. If you want to be sure you’ll get the most energy-efficient windows, look for models with the blue Energy Star certification attached to them — that means they’re certified energy-efficient by the U.S. Department of Energy.
Do I really need to use a window installation company?
You should use a window installation professional whenever you want new windows. Installing windows is a involved process that can be difficult to do on your own, so it’s best left to the professionals.
How often should you replace windows?
Windows have a typical lifespan of about 20 to 30 years. If your windows are older than that, they should probably be replaced. Apart from that, if your windows have damage anywhere on them, or they have become difficult to open or close, they may need to be replaced.
Should I replace all my windows at the same time?
If your windows are more than 20 years old, it’s most likely time to replace all of them. At that point, they are typically less efficient, draftier and/or more damaged than new windows. Replacing your windows all at once will involve less paperwork and less time.