20 Best Window Companies in Affton, MO (2025 Reviews)

If you’re thinking about getting new windows, our list of the best window installation companies can help.

We analyzed all the top-rated window companies in Affton and selected the best 20 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated January 24, 2025

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

A guide on the top window replacement companies in Affton may not seem like the most interesting article on the EcoWatch site, but trust us, windows impact your life more than you might think. Poor windows can make your home uncomfortable in the summer or winter.

Fortunately, helping you save money with upgraded windows also helps our goals of conserving energy and the resources it takes to generate it.

Efficient windows are of particular importance in Affton, where the temperature varies throughout the year. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $376 per year.

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Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Save 35% + $100 off per window!
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
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Best Window Installation & Replacement Companies in Affton

The EcoWatch team assessed dozens of providers that service the Affton area to find the top window installation companies by our standards. The providers we’ve mentioned in this article passed our review standards for energy-efficient offerings as well as customer service, local expertise, price and beyond.

Window World logo
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World provides windows expertise in Affton. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has over 27 years of industry experience, and it currently serves 200 locations nationwide.

If you’re looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, this may be the company for you.

Energy Efficiency of Window World Windows

There are a wide range of window types available from Window World, some of which are Energy Star products. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.

How much does Window World cost in Affton?

Window World doesn’t have any pricing information displayed on its website, but it's known for offering some of the most affordable window installations around. Requesting a free quote on its website is the best way to get more accurate information.

Renewal by Andersen logo
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen provides the best availability in Affton. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has over 27 years of industry experience, and it currently serves nearly every state except Mississippi and West Virginia.

If you’re looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started, this may be the company for you.

Energy Efficiency of Renewal by Andersen Windows

There are a wide range of window types available from Renewal by Andersen, some of which are Energy Star products. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.

How much does Renewal by Andersen cost in Affton?

Andersen doesn’t have any pricing information displayed 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. Requesting a free quote on its website is the best way to get more accurate information.

Window Nation logo
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon Limited service area

Window Nation provides the best residential windows in Affton. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has over 16 years of industry experience, and it currently serves residents within 75 miles of its showrooms, which are in 13 states.

If you’re looking for a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms, this may be the company for you.

Energy Efficiency of Window Nation Windows

There are a wide range of window types available from Window Nation, some of which are Energy Star products. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.

How much does Window Nation cost in Affton?

Window Nation doesn’t have any pricing information displayed 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. Requesting a free quote on its website is the best way to get more accurate information.

We strive to be unbiased and transparent by mentioning pros and cons for each provider. Additionally, any partnerships do not affect our rankings.

More Window Companies in Affton

Renewal by Andersen

Maryland Heights, MO
4.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Timely Service

Services Offered

  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Skylights

Website: https://www.renewalbyandersen.com/window-company/733-st-louis-mo/about-us
Address: 2446 Schuetz Rd, Maryland Heights, MO 63043
Phone: (314) 983-9977

Champion Replacement Windows of St. Louis

Fenton, MO
4.2
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Bay Windows

Website: https://www.championwindow.com/St-Louis/
Address: 29 Cassens Ct, Fenton, MO 63026
Phone: (636) 764-0470

Window Nation

Overland, MO
4.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Custom Window Designs
  • Service icon Vinyl Frames
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Energy-Efficient Options

Website: https://www.windownation.com/stlouis-showroom/
Address: 1913 Belt Way Dr, Overland, MO 63114
Phone: (314) 279-8249

Colonial Construction

St. Louis, MO
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation

Website: https://www.colonialstl.com/
Address: 10120 Fite Cir, St. Louis, MO 63123
Phone: (314) 725-6080

Building Envelope Experts

Fenton, MO
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options
  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Custom Window Designs
  • Service icon Bay Windows
  • Service icon Vinyl Frames

Website: https://www.buildingenv.com/
Address: 1576 Fencorp Dr Suite 160, Fenton, MO 63026
Phone: (314) 310-7878

Chaney Windows And Doors

Maryland Heights, MO
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Wood Frames
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Vinyl Frames

Website: http://chaneywindowsanddoors.com/
Address: 80 Weldon Pkwy, Maryland Heights, MO 63043
Phone: (636) 699-6353

Gateway Door and Contracting

St Charles, MO
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation

Website: https://gatewaydoorstl.com/
Address: 3711 Mueller Rd, St Charles, MO 63301
Phone: (636) 577-1430

Windows Doors & More LLC

St Charles, MO
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options

Website: http://www.wdsmore.com/
Address: 3481 New Town Blvd, St Charles, MO 63301
Phone: (636) 724-5291

Home Comfort Exteriors

St Peters, MO
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options

Website: http://www.homecomfortexteriors.com/
Address: 7839 Mexico Rd, St Peters, MO 63376
Phone: (636) 928-8900

Cardinal Contractors

St. Louis, MO
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation

Website: https://cardinalcontractors.com/
Address: 453 N Lindbergh Blvd, St. Louis, MO 63141
Phone: (314) 266-4633

STL Windows and Doors

Earth City, MO
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Timely Service

Services Offered

  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation

Website: https://stlwindowsanddoors.com/
Address: 4200 Shoreline Dr, Earth City, MO 63045
Phone: (314) 277-5952

Quality Installation

Swansea, IL
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: https://www.qualityinstallation.net/
Address: 1108 N Belt W, Swansea, IL 62226
Phone: (888) 677-6838

Butler Home Improvement

Collinsville, IL
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation

Website: http://www.butlerhomeimprovement.com/
Address: 906 Vandalia St, Collinsville, IL 62234
Phone: (618) 344-7073

Gateway General Contractors

O'Fallon, MO
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: https://www.gatewaygeneralcontractorsllc.com/
Address: 9031 Veterans Memorial Pkwy, O'Fallon, MO 63366
Phone: (636) 515-5868

Mills Window & Door Showroom

Fenton, MO
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: http://www.millswindow.com/
Address: 1860 Fenpark Dr, Fenton, MO 63026
Phone: (314) 429-7000

Jacob Sunrooms, Exteriors & Baths

Fenton, MO
4.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Vinyl Frames
  • Service icon Fiberglass Frames
  • Service icon Window Replacement/Installation
  • Service icon Glass Showers

Website: https://www.jacobsunroom.com/
Address: 1707 Gilsinn Ln, Fenton, MO 63026
Phone: (314) 241-3751

Glass Doctor of St. Charles, MO

St Charles, MO
4.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Custom Glass
  • Service icon Window Repair
  • Service icon Glass Showers
  • Service icon Energy-Efficient Options
  • Service icon Tempered Glass
  • Service icon Glass Doors
  • Service icon Mirrors
  • Service icon Glass Repair
  • Service icon Window Replacement/Installation

Website: https://glassdoctor.com/st-charles-mo/
Address: 3910 Old Hwy 94 S Ste 105A, St Charles, MO 63304
Phone: (314) 962-4344

Jones Home Improvements

Cottleville, MO
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: http://www.joneshi.com/
Address: 5305 5th St, Cottleville, MO 63304
Phone: (636) 317-1977

Lyons Glass Company

Alton, IL
4.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Tempered Glass
  • Service icon Glass Doors
  • Service icon Glass Repair
  • Service icon Mirrors
  • Service icon Glass Showers

Website: http://www.lyonsglasscompany.com/
Address: 2400 Belle St, Alton, IL 62002
Phone: (618) 462-2731

L&D Wilson's Siding & Roofing Inc

Lebanon, IL
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Repair
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Double-Hung

Website: https://www.wilsonsidinginc.com/
Address: 502 S Fritz St, Lebanon, IL 62254
Phone: (618) 632-2389
Affton Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Affton, MO using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

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 Affton Saves You Money

There are several benefits of switching to energy-efficient windows. A few reasons you may want to consider making the change are the following:

  • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which filter out damaging UV rays, reducing fading of your furniture, carpet and other valuables.
  • Decrease your carbon footprint: In Affton, you can lower your indirect greenhouse gas emissions by about 763 pounds per year after you install energy-efficient windows.
  • Save money on energy bills: The Department of Energy estimates that heat gained or lost through windows makes up about 25-30% of energy use in your home. Installing energy-efficient windows can help decrease that amount, which helps you save $376 a year on your bills.
  • Protect your investment: Upgrading your windows is an important part of maintaining your property and its real estate value, particularly if your home is on the older side.

Estimated Cost of Window Replacement in Affton

Each window installer provides various services and has varying costs based on a few factors.

How Much Do New Windows Cost?

On average, homeowners in Affton can expect that most replacement window installations will range from $250 to $1,200, with the most common installations sitting at around $600. How much it will cost varies based on several factors, including material, number of windows, type, the location of your home, size and more.

With windows, efficiency is one of the most important factors for most homeowners. High efficiency windows may cost more initially, but by increasing the efficiency of your home — particularly during the summer and winter — they can give you decades of energy savings. According to Energy Star, buying certified energy-efficient windows can save Affton homeowners $376+ a year after replacing single-pane windows.

How much your window installation costs will also vary based on the type of window material you choose for the frames. Wood windows are generally the most expensive, although it depends on whether they are completely wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are shown to be more efficient.

What Services do Window Installers Offer?

The first question to ask yourself when planning a window installation is: Should you get a full-frame installation or a pocket installation?

Full-frame installations require replacing the whole window — the sill, frame, trim and all. These are most common when you want a new style for your windows or when it has a great amount of rot or deterioration. Full-frame installations are more involved and will increase overall costs. A pocket installation entails installing a new window without replacing the frame. This means instead of tearing out the whole unit and rebuilding it, the installer will just put the replacement window (also called a retrofit or insert window) into the frame.

If you’re unsure which window installation service you need, your installer should be able to help you out. In general, the choice is based on factors such as the age and condition of the home, the type of building material, budget and time restrictions.

Advertisement

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Save 35% + $100 off per window!
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

How We Choose the Best Window Installers in Affton

EcoWatch differs from most reviewers because we evaluate these companies through a sustainability lens. We have reviewed the best window installers in Affton mainly based on energy efficiency, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can reduce your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

Service Area

Because this is a guide for Affton, we only included companies that provide services to the city. There are certainly other reputable providers that didn’t make our list because of the low odds that they would serve the average homeowner in Affton.

Work Quality

When selecting new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand you opt for. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent customer feedback to find the companies with the highest rates of customer satisfaction. Customer satisfaction might be the factor we place the most value on, as it indicates the quality of services across nearly every category, including cost, professionalism, quality of parts, warranty, quality of installation and more.

Cost

This one is a give-and-take: as with other services, cheap window companies may not provide the highest quality service. Still, 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 installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Because of Affton’s climate, homeowners need to be wary of rot, water damage and low efficiency. We factored in local experience to reflect the ability of Affton window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.

Affton, MO Window Replacement FAQs

What is the typical cost to replace windows?

The average cost of installing a single window can range from $450 to $650. There are several factors that influence how much it costs, such as how energy-efficient the windows are, styles and sizes of windows, your property’s location, the number of windows, local labor costs and the materials used in designing the windows.

What type of window is the most energy-efficient?

Generally, double-pane windows will be more efficient than single-pane windows and windows that don’t open are more efficient than windows that do. To be sure you’re getting the most energy-efficient windows, look for models with the blue Energy Star certification attached to them — that means they’re certified energy-efficient by the U.S. Department of Energy.

When should I use a window installation company?

Unless you’re handy and have the tools needed to replace your own windows, we recommend hiring a professional installer. The window installation process 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 much safer option.

How often should you replace windows?

Windows have a typical lifespan of about 20 to 30 years. If your windows are older than that, they should probably be replaced. Apart from that, if your windows have damage anywhere on them, or they have become difficult to operate, they may need to be replaced.

Should I replace my windows all at the same time?

If your windows are greater than 20 years old, it’s probably time to replace all of them. At that point, they are often less efficient, draftier and/or more damaged than new windows. Replacing your windows all at once will involve less paperwork and less time.