26 Best Window Replacement Companies in Alton, IL (2023 Reviews)
Window Companies Near Me
Are you thinking about upgrading your windows? Our list of the best window installation companies can help you pick the right one for you.
We analyzed all the top window installers in Alton and selected the top 26 based on:
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Customer reviews
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Window replacement expertise
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Popularity with home-owners like you
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Updated May 04, 2023
Why you can trust EcoWatch
A guide on the top window installation companies in Alton may not seem like the most interesting article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might realize. Traditional, outdated windows could lead to spending more on energy bills during the winter or summer months.
Thankfully, saving you money with efficient windows also helps our goals of conserving energy and the resources it takes to produce it.
As windows are so important for your home, choosing the best company for you is a big decision to make. That's why the EcoWatch team has curated this list of the best window installation companies, so you can more easily make an informed decision.
Best Overall
Renewal by Andersen
- Award-winning company
- Great industry reputation
- Member of US Green Building Council
- More expensive than competition
Best Affordability
Window World
- Great industry reputation
- Lifetime warranty
- EnergyStar Partner
- Quality of service will depend on your area
Best for Residential Windows
Window Nation
- Custom designs
- Wide variety of products and services
- Manufactures products in-house
- Installation not covered by warranty
Best Window Replacement Companies in Alton
The EcoWatch Reviews team examined dozens of installers in Alton to find the best window installation companies for our readers. The providers in this article passed our review standards for energy-efficient offerings as well as price, customer service, local expertise and beyond.

Renewal by Andersen
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Award-winning company
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Great industry reputation
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Member of US Green Building Council
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More expensive than competition
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the industry, and it currently provides services to nearly every state except Mississippi and West Virginia. Its reputation is backed by hundreds of positive reviews from customers online.
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 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 be sure to mention that you want Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Alton?Andersen does not mention prices 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 ask for a free quote from the company.

Window World
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Great industry reputation
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Lifetime warranty
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EnergyStar Partner
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Quality of service will depend on your area
Window World offers windows expertise in Alton. This window installation company has been operating since 1995 and currently serves 200 locations nationwide. The provider has a lot of glowing reviews from customers on online review websites.
Window World may be the company for you if you want one 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 has some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality Energy Star windows when inquiring. 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 Alton?Prices aren't listed on Window World's website, but 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 get more accurate information.

Window Nation
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Custom designs
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Wide variety of products and services
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Manufactures products in-house
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Installation not covered by warranty
Window Nation offers the best residential windows in Alton. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has been in the window installation industry for about 16 years.
It gives customers the opportunity to view products and to speak to a representative in person in its showrooms.
Energy Efficiency of Window Nation WindowsThere are a wide range 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 Alton?Window Nation doesn't have any prices listed 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. You can inquire about a free quote on its website for more information about the cost.

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 is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has been in the window installation industry for around 20 years. The provider has a lot of positive reviews from customers online.
Universal may be the company for you if you're interested in one that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThere are a wide variety of window types that Universal Windows Direct offers, some of which are Energy Star products. The company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products.
How much does Universal Windows Direct cost in Alton?Prices are not available on Universal's website, as the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, 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. If you'd like more accurate pricing information, you can receive a quote on the company's website.
We've recommended installers with good reputations, but keep in mind some national companies have independently owned locations in Alton, so your service may depend on your local crew. We have tried to be unbiased and transparent by listing pros and cons for every company reviewed.
More Window Replacement Companies in Alton
Penny Window
St. Louis, MO-
Price Transparency
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Timely Service
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Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Sliding Glass
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Tempered Glass
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Bay Windows
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Custom Window Designs
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Glass Showers
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Residential Windows
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Double-Hung
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Aluminum Window Frames
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Energy-Efficient Options
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Fast Delivery
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Commercial Windows
The Blind Broker of St. Louis
St Peters, MO-
Free assessment
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Price Transparency
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Award-Winning
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Good Customer Service
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Educational Website
Services Offered
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Energy-Efficient Options
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Stained Glass
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Residential Windows
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Glass Showers
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Full-Service Installations
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Commercial Windows
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Bay Windows
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Custom Window Designs
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Aluminum Window Frames
Window World of St. Louis
Earth City, MO-
Educational Website
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Price Transparency
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Good Customer Service
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Timely Service
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Free assessment
Services Offered
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Double-Hung
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Sliding Glass
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Residential Windows
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Fast Delivery
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Glass Showers
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Commercial Windows
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Energy-Efficient Options
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Custom Window Designs
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Bay Windows
Chaney Windows And Doors
Maryland Heights, MO-
Educational Website
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Good Customer Service
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Price Transparency
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Free assessment
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Award-Winning
Services Offered
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Residential Windows
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Commercial Windows
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Double-Hung
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Energy-Efficient Options
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Stained Glass
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Custom Window Designs
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Sliding Glass
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Bay Windows
Two Blind Guys
Des Peres, MO-
Price Transparency
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Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Stained Glass
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Energy-Efficient Options
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Custom Window Designs
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Aluminum Window Frames
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Commercial Windows
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Bay Windows
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Residential Windows
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Glass Showers
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Sliding Glass
Window Nation
Overland, MO-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
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Award-Winning
Services Offered
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Energy-Efficient Options
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Double-Hung
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Sliding Glass
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Bay Windows
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Stained Glass
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Custom Window Designs
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Residential Windows
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Glass Showers
Empire Supply Co
St. Louis, MO-
Price Transparency
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Educational Website
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Free assessment
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Good Customer Service
Services Offered
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Residential Windows
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Aluminum Window Frames
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Energy-Efficient Options
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Glass Showers
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Custom Window Designs
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Double-Hung
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Commercial Windows
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Tempered Glass
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Sliding Glass
Masonry & Glass Systems Inc
St. Louis, MO-
Price Transparency
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Award-Winning
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Stained Glass
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Glass Showers
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Double-Hung
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Residential Windows
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Custom Window Designs
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Sliding Glass
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Bay Windows
Triton Exteriors
St. Louis, MO-
Free assessment
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Award-Winning
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Educational Website
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Good Customer Service
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Price Transparency
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Timely Service
Services Offered
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Double-Hung
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Custom Window Designs
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Fast Delivery
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Residential Windows
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Glass Showers
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Commercial Windows
Sears Window Replacement
Bridgeton, MO-
Free assessment
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Award-Winning
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Sliding Glass
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Glass Showers
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Residential Windows
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Custom Window Designs
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Double-Hung
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Bay Windows
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Energy-Efficient Options
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Stained Glass
Mr. Handyman of Central St. Louis County
Maryland Heights, MO-
Timely Service
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Good Customer Service
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Free assessment
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Award-Winning
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Price Transparency
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Educational Website
Services Offered
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Double-Hung
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Stained Glass
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Glass Showers
Home Services at The Home Depot
Brentwood, MO-
Price Transparency
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Fast Delivery
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Stained Glass
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Custom Window Designs
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Glass Showers
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Sliding Glass
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Commercial Windows
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Residential Windows
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Bay Windows
STL Windows and Doors
St. Louis, MO-
Free assessment
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Good Customer Service
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Price Transparency
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Timely Service
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Educational Website
Services Offered
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Bay Windows
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Sliding Glass
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Custom Window Designs
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Double-Hung
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Commercial Windows
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Residential Windows
Glass & More Inc. Low price glass repair!
Belleville, IL-
Price Transparency
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Custom Window Designs
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Sliding Glass
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Double-Hung
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Full-Service Installations
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Commercial Windows
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Glass Showers
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Residential Windows
STL Design and Build
Maryland Heights, MO-
Free assessment
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Price Transparency
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Educational Website
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Good Customer Service
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Timely Service
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Award-Winning
Services Offered
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Residential Windows
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Double-Hung
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Fast Delivery
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Glass Showers
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Custom Window Designs
Kirkwood Glass Co
Kirkwood, MO-
Price Transparency
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Good Customer Service
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Educational Website
Services Offered
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Tempered Glass
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Custom Window Designs
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Double-Hung
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Fast Delivery
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Sliding Glass
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Full-Service Installations
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Residential Windows
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Glass Showers
Glass Doctor of Greater St. Louis
St. Louis, MO-
Good Customer Service
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Educational Website
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Price Transparency
Services Offered
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Commercial Windows
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Residential Windows
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Fast Delivery
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Custom Window Designs
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Glass Showers
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Double-Hung
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Tempered Glass
Mr. Handyman of St. Charles Co. and Chesterfield Valley
St Peters, MO-
Price Transparency
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Timely Service
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Commercial Windows
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Double-Hung
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Glass Showers
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Residential Windows
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Custom Window Designs
Viviano Windows & Door
Webster Groves, MO-
Good Customer Service
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Timely Service
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Free assessment
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Price Transparency
Services Offered
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Commercial Windows
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Custom Window Designs
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Residential Windows
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Stained Glass
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Energy-Efficient Options
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Glass Showers
Hyperion Glass Company
St. Louis, MO-
Good Customer Service
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Free assessment
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Price Transparency
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Educational Website
Services Offered
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Glass Showers
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Double-Hung
Blind Ambition STL
St Charles, MO-
Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Full-Service Installations
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Custom Window Designs
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Fast Delivery
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Aluminum Window Frames
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Commercial Windows
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Residential Windows
Window Doors & More LLC
St Charles, MO-
Free assessment
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Good Customer Service
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Educational Website
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Award-Winning
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Price Transparency
Services Offered
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Residential Windows
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Energy-Efficient Options
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Custom Window Designs
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Fast Delivery
House Doctors of St Louis - Handyman Services (previously Andy OnCall Handyman Services)
St Peters, MO-
Price Transparency
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Educational Website
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Timely Service
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Free assessment
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Good Customer Service
Services Offered
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Glass Showers
Butler Home Improvement
Collinsville, IL-
Good Customer Service
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Price Transparency
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Award-Winning
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Free assessment
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Educational Website
Services Offered
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Glass Showers
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Residential Windows
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Double-Hung
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Custom Window Designs
Martin Door
St Peters, MO-
Good Customer Service
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Educational Website
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Award-Winning
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Free assessment
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Price Transparency
Services Offered
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Residential Windows
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Aluminum Window Frames
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Commercial Windows
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Custom Window Designs
LEI Home Enhancements
St. Louis, MO-
Free assessment
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Educational Website
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Price Transparency
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Good Customer Service
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Award-Winning
Services Offered
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Fast Delivery
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Commercial Windows
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Residential Windows
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Sliding Glass
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Custom Window Designs
How Installing Energy-Efficient Windows in Alton Saves You Money
There are quite a few benefits of switching to energy-efficient windows. Some reasons you may want to consider making the switch include the following:
- Save on energy bills: The Department of Energy estimates that heat gained or lost via windows accounts for around 25-30% of household energy use. Installing energy-efficient windows can help reduce that amount, which helps you save more on your bills.
- Reduce your carbon footprint: In Alton, you can reduce your indirect greenhouse gas emissions by about 642 pounds per year after you install energy-efficient windows.
- Protect your investment: If your home is on the older side, your windows are most likely outdated. Upgrading your windows can improve the insulation in your home and also help raise the value of your home if you decide to sell.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
Estimated Cost of Window Replacement in Alton
Let's take a look at the cost of replacing your windows and the kinds of services offered by installers.
How Much Do New Windows Cost?
The typical cost to install a single window is about $600 but can range from $200 to $1,200. These amounts vary based on the specifics of your installation, like material, the location of your home, size, number of windows, type and more.
Whether or not you opt for energy-efficient windows is another factor that will determine the cost. These will usually cost more than other windows, but on the other hand, you can save about $313 a year on your energy bills in Alton.
The cost of your window installation will also vary depending on the kind of window material you choose for the frames. Wood windows are generally the most expensive, but it depends if they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are more efficient.
What Services do Window Installers Offer?
The first step when planning a replacement is to figure out whether you need a full-frame or pocket installation.
Full-frame installations entail replacing the total window, including the sill, frame and trim. Full-frame installations are necessary when you want a new style or your window has significant damage. Because full-frame installations are more involved, they will raise the total cost. A pocket installation means replacing a window without taking out the complete frame, which is usually cheaper than a full-frame installation.
If you're unsure which kind of window installation service you should get, your installer can advise you. Generally, 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 Overall
Renewal by Andersen
- Award-winning company
- Great industry reputation
- Member of US Green Building Council
- More expensive than competition
Best Affordability
Window World
- Great industry reputation
- Lifetime warranty
- EnergyStar Partner
- Quality of service will depend on your area
Best for Residential Windows
Window Nation
- Custom designs
- Wide variety of products and services
- Manufactures products in-house
- Installation not covered by warranty
How We Choose the Best Window Installers in Alton
The EcoWatch Reviews team is different from other reviewers since we assess these companies through a sustainability lens. We've decided to review the top window installation companies in Alton 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 power bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
This one is self-explanatory, but we've chosen to highlight window installation companies that serve Alton so you can find a quality window installation company near you.
Work Quality
When picking new windows, the quality and breadth of services can often play just as important of a role in overall efficiency and performance as the brand 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
We analyzed patterns in recent customer feedback to determine the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction may be the most important factor, as it reflects the quality of services across most other categories, including professionalism, quality of parts, quality of installation, warranty, cost and more.
Cost
This one is a give-and-take: as with most services, cheap window companies won't always provide the highest quality service. On the other hand, we want to make sure we're highlighting companies that offer a spectrum of price and financing options so they're accessible to most homeowners.
Warranty
Protecting your investment in new windows is important. That's why window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have been in the industry for quite some time. Window installers that have more experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.
Alton, IL Window Replacement FAQs
How much does window installation cost?
The typical cost of installing one window ranges between $450 and $650. There are several factors that influence the cost, which include styles and sizes of windows, the materials used in designing the windows, how energy-efficient the windows are, the number of windows, local labor costs and your property's location.
What type of window is the best for energy efficiency?
A window's energy efficiency is affected by a variety of factors, including the quality of the installation and what kind of window it is. Look for Energy Star Certified windows — these are often the most energy-efficient since they are certified by the U.S. Department of Energy.
When should I use a window installation company?
Unless you have home repair skills and have the time needed to replace your own windows, we recommend hiring the pros. 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 professional is a faster, more efficient and safer alternative.
When is the best time of year to replace windows?
Replacement windows can be installed any time of the year, but autumn might be the best season. Regardless of when you install them, the contractors will take steps to make sure that too much hot or cold air doesn't get into your home, so the temperature outside isn't necessarily a big factor. Most importantly, the weather should be dry.
How often do you need to replace windows?
Windows generally last around 20 to 30 years, but anytime you notice damage on your windows, it's a good time to have them looked at by an expert to determine if they are in need of a repair or replacement.