27 Best Window Replacement Companies in Alton, IL (Jan 2023)
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 27 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 January 12, 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 Traditional, outdated windows could lead to spending more on energy bills during the winter or summer months.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
- Manufactures products in-house
- Great industry reputation
- More expensive than competition
Best Affordability
Window World
- Lifetime warranty
- Low prices relative to competitors
- EnergyStar Partner
- Quality of service will depend on your area
Best for Residential Windows
Window Nation
- Manufactures products in-house
- Custom designs
- Wide variety of products and services
- Limited service area
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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Manufactures products in-house
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Great industry reputation
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More expensive than competition
Renewal by Andersen offers the best availability in Alton. Andersen has around 27 years of experience in the window installation industry. Many positive reviews from customers online back the provider'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 be sure to mention that you'd like Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Alton?Andersen does not display 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. Getting a free quote on its website is the best way to get more accurate pricing information.

Window World
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Lifetime warranty
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Low prices relative to competitors
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EnergyStar Partner
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Quality of service will depend on your area
Window World has windows expertise in Alton. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has around 27 years of experience in the window installation sector. Its reputation is backed by several positive reviews from customers online.
It is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsWindow World's commitment to sustainability can be seen in its energy-efficient window offerings. 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 mentioned on Window World's website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate information is to ask for a free quote from the company.

Window Nation
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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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Limited service area
Window Nation has 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. This provider has 16 years of experience in the window installation industry, and it has proved to be one of the most respected companies in Alton.
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 caters to eco-conscious consumers by providing energy-efficient window offerings. 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?Pricing information is not available on Window Nation's website, as 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. For more detailed information on the cost, you can request a quote from the company.

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 offers the best warranty in Alton. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This provider has 20 years of experience in the window installation industry, and it has become one of the most reputable companies in the business. Many positive reviews from customers online back the company's reputation.
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 available from Universal Windows Direct, 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 aren't mentioned 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. For more detailed information on the cost, you can get a quote from the company.
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
The Glass Guru
Wentzville, MO-
Locally Recognized for Quality
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Helps Educate Customers
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No-Hassle Pricing
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Consistent Workmanship
Services Offered
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Residential Windows
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Glass Showers
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Tempered Glass
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Custom Window Designs
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Aluminum Window Frames
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Full-Service Installations
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Commercial Windows
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Double-Hung
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Sliding Glass
Wildwood Roofing & Construction
Ellisville, MO-
Consistent Workmanship
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Helps Educate Customers
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Reliable Appointment Windows
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Locally Recognized for Quality
Services Offered
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Residential Windows
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Architectural Glass
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Glass Showers
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Custom Windows
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Aluminum Window Frames
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Business Windows
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Double-Hung
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Sliding Glass
Window World of St. Louis
Bridgeton, MO-
Timely Service
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Price Transparency
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No-fee Quotes
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Excellent Customer Service
Services Offered
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Fast Delivery
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Chaney Windows And Doors
Maryland Heights, MO-
Good Customer Service
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Locally Recognized for Quality
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Free Quotes
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No-Hassle Pricing
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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Double-Hung
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Stained Glass
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Sliding Glass
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Bay Windows
Mr. Handyman of Metro East
Collinsville, IL-
Consistent Workmanship
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Helps Educate Customers
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Locally Recognized for Quality
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Free Quotes
Services Offered
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Custom Windows
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Residential Windows
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Commercial Windows
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Double-Hung
Renewal by Andersen of St. Louis
Maryland Heights, MO-
Charitable Giving
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Price Transparency
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Helps Educate Customers
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Good Customer Service
Services Offered
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Energy-Efficient Options
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Custom Windows
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Full-Service Installations
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Double-Hung
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Sliding Glass
Lowe's Home Improvement
Belleville, IL-
Reliable Appointment Windows
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Dependable Service
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No-Hassle Pricing
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Good Customer Service
Services Offered
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Empire Supply Co
St. Louis, MO-
Price Transparency
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Good Customer Service
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Helps Educate Customers
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No-fee Quotes
Services Offered
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Residential Windows
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Energy-Efficient Options
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Tempered Glass
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Custom Windows
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
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Sliding Glass
Glass & More Inc. Low price glass repair!
Belleville, IL-
No-Hassle Pricing
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No-fee Quotes
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Educational Website
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Excellent Customer Service
Services Offered
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Residential Windows
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Custom Windows
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Full-Service Installations
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Commercial Windows
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Double-Hung
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Sliding Glass
Energy View Windows - Home Improvements
Hazelwood, MO-
No-fee Quotes
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Helps Educate Customers
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Locally Recognized for Quality
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Good Customer Service
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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Aluminum Window Frames
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Energy-Efficient Options
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Architectural Glass
Spectrum Glass & Tinting
O'Fallon, MO-
Price Transparency
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No-fee Quotes
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Consistent Workmanship
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Excellent Customer Service
Services Offered
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Residential Windows
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Fast Delivery
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Custom Window Designs
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Full-Service Installations
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Commercial Windows
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Double-Hung
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Sliding Glass
All About Glass
Arnold, MO-
Price Transparency
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Good Customer Service
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Free Quotes
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Reliable Service
Services Offered
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Residential Windows
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Heavy Glass
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Doors
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Custom Windows
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Aluminum Window Frames
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Commercial Windows
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Sliding Glass
Masonry & Glass Systems Inc
St. Louis, MO-
No-fee Quotes
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Award-Winning
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Consistent Workmanship
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Helps Educate Customers
Services Offered
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Custom Window Designs
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Glass Showers
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Sliding Glass
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Double-Hung
Window Nation
Overland, MO-
Price Transparency
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No-fee Quotes
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Locally Recognized for Quality
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Educational Website
Services Offered
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Sliding Glass
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Custom Window Designs
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Energy-Efficient Options
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Double-Hung
Sears Window Replacement
Bridgeton, MO-
Educational Website
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Consistent Workmanship
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Award-Winning
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Good Customer Service
Services Offered
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Sliding Glass
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Custom Window Designs
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Energy-Efficient Options
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Double-Hung
STL Windows and Doors
St. Louis, MO-
Price Transparency
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Free Quotes
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Good Customer Service
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Dependable Service
Services Offered
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Custom Window Designs
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Residential Windows
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Sliding Glass
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Double-Hung
Building Envelope Experts
Fenton, MO-
Reliable Service
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Good Customer Service
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No-Hassle Pricing
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Helps Educate Customers
Services Offered
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Sliding Glass
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Custom Windows
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Energy-Efficient Options
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Double-Hung
Missouri Glass Company
St. Louis, MO-
Dependable Service
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Helps Educate Customers
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No-Hassle Pricing
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Excellent Customer Service
Services Offered
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Residential Windows
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Heavy Glass
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Tempered Glass
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Custom Window Designs
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Business Windows
Clear Window Technology
Ballwin, MO-
Free Quotes
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Excellent Customer Service
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Award-Winning
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Price Transparency
Services Offered
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Architectural Glass
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Custom Windows
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Full-Service Installations
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Double-Hung
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Bay & Bow Windows
Lakeside Renovation & Design
Chesterfield, MO-
Arrives on Time
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Helps Educate Customers
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Excellent Customer Service
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Award-Winning
Services Offered
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Custom Window Designs
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Full-Service Installations
Alenco Inc.
Fenton, MO-
No-Hassle Pricing
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Excellent Customer Service
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Reliable Appointment Windows
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Helps Educate Customers
Services Offered
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Custom Windows
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Glass Showers
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Sliding Glass
Banner Construction
St. Louis, MO-
Helps Educate Customers
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Consistent Workmanship
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No-fee Quotes
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Good Customer Service
Services Offered
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Custom Windows
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Full-Service Installations
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Double-Hung
Jacob Sunrooms, Exteriors & Baths
Fairview Heights, IL-
Locally Recognized for Quality
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Reliable Appointment Windows
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No-Hassle Pricing
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No-fee Quotes
Services Offered
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Custom Windows
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Energy-Efficient Options
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Double-Hung
Winco Window Company
St. Louis, MO-
Educational Website
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No-fee Quotes
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Excellent Customer Service
Services Offered
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Residential Windows
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Architectural Glass
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Custom Windows
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Aluminum Window Frames
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Business Windows
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Double-Hung
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Sliding Glass
Millstadt Glass Inc
Millstadt, IL-
Good Customer Service
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No-fee Quotes
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No-Hassle Pricing
Services Offered
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Residential Windows
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Glass Showers
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Fast Delivery
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Tempered Glass
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Custom Windows
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Business Windows
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Sliding Glass
Metropolitan Glass
Florissant, MO-
Good Customer Service
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Free Quotes
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Helps Educate Customers
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Reliable Service
Services Offered
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Custom Windows
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Residential Windows
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Tempered Glass
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Sliding Glass
A Pane In The Glass
St Charles, MO-
No-Hassle Pricing
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Helps Educate Customers
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Good Customer Service
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Consistent Workmanship
Services Offered
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Custom Windows
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Residential Windows
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Aluminum Window Frames
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Commercial Windows
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 $307 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
- Manufactures products in-house
- Great industry reputation
- More expensive than competition
Best Affordability
Window World
- Lifetime warranty
- Low prices relative to competitors
- EnergyStar Partner
- Quality of service will depend on your area
Best for Residential Windows
Window Nation
- Manufactures products in-house
- Custom designs
- Wide variety of products and services
- Limited service area
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.