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
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Why you can trust EcoWatch
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.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
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
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
Quality of service will depend on your area
Window World 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 WindowsThere are a wide range of window types available from Window World, some of which are Energy Star products. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.
How much does Window World cost in 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
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
More expensive than competition
Renewal by Andersen 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 WindowsThere are a wide range of window types available from Renewal by Andersen, some of which are Energy Star products. A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019.
How much does Renewal by Andersen cost in 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
Award-winning company
Manufactures products in-house
Custom designs
Wide variety of products and services
Installation not covered by warranty
Limited service area
Window Nation 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 WindowsThere are a wide range of window types available from Window Nation, some of which are Energy Star products. Each product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation.
How much does Window Nation cost in 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, MOPrice Transparency
Free assessment
Educational Website
Good Customer Service
Timely Service
Services Offered
Double-Hung
Glass Doors
Bay Windows
Window Replacement/Installation
Skylights
Champion Replacement Windows of St. Louis
Fenton, MOFree assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Double-Hung
Bay Windows
Window Nation
Overland, MOFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Double-Hung
Window Replacement/Installation
Custom Window Designs
Vinyl Frames
Glass Doors
Bay Windows
Energy-Efficient Options
Colonial Construction
St. Louis, MOEducational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Building Envelope Experts
Fenton, MOGood Customer Service
Educational Website
Free assessment
Price Transparency
Timely Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Double-Hung
Glass Doors
Custom Window Designs
Bay Windows
Vinyl Frames
Chaney Windows And Doors
Maryland Heights, MOFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Wood Frames
Energy-Efficient Options
Bay Windows
Window Replacement/Installation
Glass Doors
Vinyl Frames
Gateway Door and Contracting
St Charles, MOEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Windows Doors & More LLC
St Charles, MOGood Customer Service
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Home Comfort Exteriors
St Peters, MOGood Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Cardinal Contractors
St. Louis, MOFree assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
STL Windows and Doors
Earth City, MOPrice Transparency
Good Customer Service
Free assessment
Educational Website
Timely Service
Services Offered
Double-Hung
Glass Doors
Bay Windows
Window Replacement/Installation
Quality Installation
Swansea, ILGood Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Butler Home Improvement
Collinsville, ILFree assessment
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Gateway General Contractors
O'Fallon, MOPrice Transparency
Good Customer Service
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Mills Window & Door Showroom
Fenton, MOGood Customer Service
Price Transparency
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Jacob Sunrooms, Exteriors & Baths
Fenton, MOPrice Transparency
Good Customer Service
Educational Website
Free assessment
Services Offered
Energy-Efficient Options
Vinyl Frames
Fiberglass Frames
Window Replacement/Installation
Glass Showers
Glass Doctor of St. Charles, MO
St Charles, MOEducational Website
Price Transparency
Good Customer Service
Services Offered
Custom Glass
Window Repair
Glass Showers
Energy-Efficient Options
Tempered Glass
Glass Doors
Mirrors
Glass Repair
Window Replacement/Installation
Jones Home Improvements
Cottleville, MOGood Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Lyons Glass Company
Alton, ILFree assessment
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Tempered Glass
Glass Doors
Glass Repair
Mirrors
Glass Showers
L&D Wilson's Siding & Roofing Inc
Lebanon, ILGood Customer Service
Price Transparency
Timely Service
Free assessment
Services Offered
Window Repair
Energy-Efficient Options
Window Replacement/Installation
Double-Hung
Calculate how much you can expect to pay for window installation and replacement in Affton, MO using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in 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.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
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.