17 Best Window Companies in Sterling, IL (2023 Reviews)
Thinking about improving your property's look? The best window replacement companies can help.
We analyzed all the top-rated window companies in Sterling and selected the best 17 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
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 home's efficiency can also have a large impact on home energy conservation. During the winter months, the last thing you want is your heat to leak out of your outdated, drafty windows.
Fortunately, helping you save energy with upgraded windows also helps our goals of conserving energy and the resources it takes to generate it.
Unlike other review sites, EcoWatch ranks window replacement companies based on energy efficiency while also considering cost, customer satisfaction and service area.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Sterling
The EcoWatch team researched dozens of installers across the country to find the best window replacement companies for our readers. We assessed the installers based on energy-efficient offerings, customer service, coverage area, price, local experience and more.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World offers windows expertise in Sterling. This company has 27 years of experience in the window installation business, and it has become one of the most reputable companies in the business. Hundreds of positive reviews on customer review websites 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 WindowsIts high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in Sterling?Prices are not available on Window World’s website since the cost of window replacement 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. Receiving a free quote on its website is the best way to know for sure.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen offers the best availability in Sterling. This company has 27 years of experience in the window installation business, and it has become one of the most reputable companies in the business. Hundreds of positive reviews on customer review websites 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 WindowsA 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. Not all of Andersen’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Sterling?Prices are not available on Andersen’s website since the cost of window replacement 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. Receiving a free quote on its website is the best way to know for sure.

Universal Windows Direct
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Makes charitable contributions
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Manufactures products in-house
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Wide variety of products and services
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Lifetime warranty
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Limited service area
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Some installations carried out by third-party contractors
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Quality of service will depend on your area
Universal Windows Direct has the best warranty in Sterling. Universal has around 20 years of experience in the window replacement business. Its reputation is backed by all the positive reviews from customers online.
It has established itself as a company that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsUniversal Windows Direct 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 Universal representative when inquiring about services.
How much does Universal Windows Direct cost in Sterling?Prices aren’t displayed on Universal’s website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. The best way to get more accurate pricing information is to request a free quote from the company.

Window Nation
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Award-winning company
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Manufactures products in-house
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Custom designs
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Wide variety of products and services
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Installation not covered by warranty
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Limited service area
Window Nation offers the best residential windows in Sterling. This company has 16 years of experience in the window installation business, and it has become one of the most reputable companies in the business. Hundreds of positive reviews on customer review websites 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 WindowsEach 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. Not all of Window Nation’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window Nation cost in Sterling?Prices are not available on Window Nation’s website since the cost of window replacement 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. Receiving a free quote on its website is the best way to know for sure.
We aim to remain unbiased and transparent by including pros and cons for every company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Companies in Sterling
Renewal by Andersen of Quad Cities
Davenport, IA-
Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Full-Service Installations
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Residential Windows
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Bay Windows
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Commercial Windows
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Sliding Glass
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Custom Window Designs
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Double-Hung
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Stained Glass
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Window Replacement
Window World of Rockford
Loves Park, IL-
Good Customer Service
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Educational Website
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Timely Service
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Price Transparency
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Free assessment
Services Offered
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Window Repair
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Fast Delivery
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Energy-Efficient Options
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Residential Windows
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Double-Hung
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Window Replacement
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Commercial Windows
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Glass Showers
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Bay Windows
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Sliding Glass
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Custom Window Designs
American Quality Windows Inc
Chadwick, IL-
Price Transparency
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Free assessment
Services Offered
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Custom Window Designs
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Double-Hung
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Energy-Efficient Options
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Commercial Windows
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Residential Windows
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Window Replacement
Home Services at The Home Depot
Clinton, IA-
Educational Website
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Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Glass Showers
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Fast Delivery
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Commercial Windows
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Stained Glass
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Custom Window Designs
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Residential Windows
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Window Replacement
Pella Windows & Doors of Mendota
Mendota, IL-
Free assessment
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Good Customer Service
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Educational Website
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Price Transparency
Services Offered
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Fast Delivery
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Stained Glass
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Commercial Windows
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Sliding Glass
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Custom Window Designs
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Residential Windows
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Window Replacement
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Double-Hung
Nelson & Son Siding Contractors
Le Claire, IA-
Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Double-Hung
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Window Replacement
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Residential Windows
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Custom Window Designs
Pella Window and Door Showroom of Rockford, IL
Rockford, IL-
Free assessment
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Price Transparency
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Good Customer Service
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Educational Website
Services Offered
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Residential Windows
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Stained Glass
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Fast Delivery
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Double-Hung
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Custom Window Designs
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Commercial Windows
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Sliding Glass
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Window Replacement
Freedom Builders & Remodelers
Rockford, IL-
Price Transparency
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Educational Website
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Free assessment
Services Offered
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Commercial Windows
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Glass Showers
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Residential Windows
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Window Replacement
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Custom Window Designs
Pella Windows & Doors of Davenport
Davenport, IA-
Price Transparency
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Educational Website
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Good Customer Service
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Free assessment
Services Offered
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Window Replacement
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Sliding Glass
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Bay Windows
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Double-Hung
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Custom Window Designs
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Residential Windows
New Look Window
Rock Island, IL-
Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Custom Window Designs
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Commercial Windows
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Double-Hung
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Window Replacement
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Residential Windows
Responsive Roofing, LLC
DeKalb, IL-
Good Customer Service
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Price Transparency
Services Offered
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Custom Window Designs
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Commercial Windows
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Residential Windows
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Window Replacement
Midwest Window Company
Moline, IL-
Educational Website
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Free assessment
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Price Transparency
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Good Customer Service
Services Offered
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Window Repair
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Residential Windows
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Custom Window Designs
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Energy-Efficient Options
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Window Replacement
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Double-Hung
XL Contracting
Roscoe, IL-
Free assessment
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Educational Website
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Price Transparency
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Good Customer Service
Services Offered
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Bay Windows
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Energy-Efficient Options
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Window Replacement
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Residential Windows
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Double-Hung
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Fast Delivery
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Custom Window Designs
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Commercial Windows
Kobyco Inc
Loves Park, IL-
Good Customer Service
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Price Transparency
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Free assessment
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Educational Website
Services Offered
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Window Replacement
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Residential Windows
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Sliding Glass
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Commercial Windows
Sandwich Millworks
Sandwich, ILServices Offered
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Residential Windows
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Custom Window Designs
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Window Replacement
Window World of Davenport
Davenport, IA-
Free assessment
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Timely Service
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Price Transparency
Services Offered
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Sliding Glass
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Energy-Efficient Options
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Window Replacement
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Residential Windows
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Commercial Windows
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Custom Window Designs
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Double-Hung
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Bay Windows
Home Services at The Home Depot
Rockford, IL-
Educational Website
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Free assessment
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Price Transparency
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Good Customer Service
Services Offered
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Custom Window Designs
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Commercial Windows
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Fast Delivery
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Stained Glass
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Glass Showers
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Window Replacement
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Residential Windows
Calculate how much you can expect to pay for window installation and replacement in Sterling, 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 Sterling Saves You Money
By switching to energy-efficient windows, you and your family can benefit in several ways, such as:
- Better temperature control in your home: Energy-efficient windows can lower how hard your heating system needs to work to heat your home.
- Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes tend to have windows that are outdated, drafty or potentially even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.
- Save on electricity bills: Because energy-efficient windows decrease how much energy you need to heat or cool your home, they can help you save about $320 annually on your energy bills in Sterling.
- Protect your valuables: The low-emissivity coatings on many energy-efficient windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.
Estimated Cost of Window Replacement in Sterling
Let's go over the cost of window replacement and the kinds of services offered by installers.
How Much Do New Windows Cost?
On average, homeowners in Sterling can expect that most replacement window installations will range from $250 to $1,200, with the most common installations sitting at about $600. This is because of the fact that the cost of window installations depend on several factors specific to your home, like the size, material and number of windows you need to install, as well as the location of your property.
It's also worth noting that energy-efficient windows will cost more upfront, but Energy Star estimates that upgrading the windows on your Sterling home translates to an average energy savings of $236 to $319 a year for single-pane window replacement, or between $87 to $126 a year for double-pane windows. How much you'll save by installing energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
The cost of your window installation will also vary depending on the kind of material you choose for the frames. Wood windows are generally the most expensive, though it depends if they are 100% 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?
Generally, there are two types of window replacement services you can get: full-frame and pocket installations.
A full-frame installation replaces the complete window, including the windowsill, frame, trim and the window panes. As this kind of installation is more involved, it will cost more than a pocket installation. Pocket installations (or retrofits) entail installing a new window within the existing frame, which makes pocket installations take less time and therefore cost less. However, if the frame has any rot or deterioration, you will likely need a full-frame installation instead.
Your window installation company can recommend the best type for your project. In Sterling, the choice will mostly be based on the efficiency of your home and how old your existing frames are.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Sterling
EcoWatch reviews differ from most reviews since we look at these companies through a sustainability lens. We've assessed the top window installers in Sterling primarily based on their energy efficient offerings, as the most sustainable option also benefits homeowners in many ways. Energy Star certified windows can cut your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology considers the following factors:
Service Area
This one is pretty self-explanatory, but we've chosen to highlight window installation companies that serve Sterling so you can find a quality window installation company near you.
Work Quality
We're certain that you're looking for a company to do a great job installing windows. We've vetted each installer featured on this list 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
Another self-explanatory yet super important review factor is customer feedback. If the majority of customers don't have good things to say about their experience with a certain installer, it won't be featured on EcoWatch.
Cost
This one is a give-and-take: as with most services, cheap window companies are not going to provide the highest quality service. On the other hand, we want to make sure we're highlighting companies that provide a variety of price and financing options so they're accessible to most homeowners.
Warranty
As discussed previously, windows are a sizable investment, so you'll want to make sure that investment is protected. Window installation companies with lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have been in the industry for quite some time. Window installation companies that have more experience will earn higher rankings by our standards. We like to see at least ten years of experience.
Sterling, IL Window Replacement FAQs
How much does window installation cost?
The national average cost of replacing a single window is about $600 but can range from $200 to $1,200, depending on a few different factors. The price is often dependent on the type and material of the window, the size of the window and the location of your property. Also, bear in mind 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?
There are various kinds of windows you can get for your home, including awning windows, double-hung and single-hung windows, transom windows, slider windows, casement windows, bay windows and picture windows.
What do window installation companies do?
Window installation professionals go to your home to remove your old windows and replace them with new ones. Some companies install products sold by other companies, whereas others install their own windows. The installer will also clean up after the installation is complete.
What time of year is the best time to replace my windows?
While you can install windows any time of year, warmer weather is typically better for installing replacement windows. Additionally, the weather should be dry, as rain can make the installation harder.