20 Best Window Companies in St. Ann, MO (2025 Reviews)
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-rated window companies in St. Ann 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 review of the top window installation companies in St. Ann may not seem like the most compelling article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might think. If you have old or damaged windows, your AC or heating system could be working overtime to heat or cool your home. This means spending more on energy bills.
Luckily, saving you money with more efficient windows also aligns with our goals of conserving energy and the resources it takes to produce it.
Unlike other sites, EcoWatch ranks window replacement companies on energy efficiency while also considering cost, customer satisfaction and service area.
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 St. Ann
The EcoWatch Reviews team examined several window installation companies in St. Ann to find the best ones for our readers. The providers in this article scored best in our review categories, which include energy-efficient offerings, price, local expertise, availability, customer service and more.

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 offers windows expertise in St. Ann. This provider has 27 years of experience in the window installation business, and it has become one of the best companies in the business.
You may want to consider going with Window World 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.
Energy Efficiency of Window World WindowsIts high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s offerings are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in St. Ann?Prices aren’t available on Window World’s website, but it's known for offering some of the most affordable window installations around. Getting 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 offers the best availability in St. Ann. This provider has 27 years of experience in the window installation business, and it has become one of the best companies in the business.
You may want to consider going with Andersen 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.
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 offerings 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 St. Ann?Prices aren’t available on Andersen’s 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 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 offers the best residential windows in St. Ann. This provider has 16 years of experience in the window installation business, and it has become one of the best companies in the business.
You may want to consider going with Window Nation 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.
Energy Efficiency of Window Nation WindowsEach product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation. Not all of Window Nation’s offerings are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Window Nation cost in St. Ann?Prices aren’t available on Window Nation’s 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. Getting a free quote on its website is the best way to get more accurate information.
Please note that the companies in this section are national, which means the quality of the service may depend on your local team. We have tried to be unbiased and transparent by describing both pros and cons for every provider.
More Window Companies in St. Ann
Renewal by Andersen
Maryland Heights, MOFree assessment
Timely Service
Good Customer Service
Price Transparency
Educational Website
Services Offered
Skylights
Bay Windows
Window Replacement/Installation
Glass Doors
Double-Hung
Champion Replacement Windows of St. Louis
Fenton, MOGood Customer Service
Price Transparency
Free assessment
Services Offered
Double-Hung
Bay Windows
Window Replacement/Installation
Glass Doors
Window Nation
Overland, MOEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Glass Doors
Bay Windows
Custom Window Designs
Vinyl Frames
Double-Hung
Energy-Efficient Options
Window Replacement/Installation
Chaney Windows And Doors
Maryland Heights, MOFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Bay Windows
Energy-Efficient Options
Window Replacement/Installation
Wood Frames
Glass Doors
Vinyl Frames
Gateway Door and Contracting
St Charles, MOFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
Windows Doors & More LLC
St Charles, MOGood Customer Service
Educational Website
Free assessment
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Building Envelope Experts
Fenton, MOTimely Service
Good Customer Service
Free assessment
Price Transparency
Educational Website
Services Offered
Glass Doors
Custom Window Designs
Vinyl Frames
Double-Hung
Energy-Efficient Options
Bay Windows
Window Replacement/Installation
Colonial Construction
St. Louis, MOEducational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Home Comfort Exteriors
St Peters, MOGood Customer Service
Price Transparency
Free assessment
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Cardinal Contractors
St. Louis, MOGood Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
STL Windows and Doors
Earth City, MOPrice Transparency
Good Customer Service
Timely Service
Educational Website
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Bay Windows
Double-Hung
Gateway General Contractors
O'Fallon, MOFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Butler Home Improvement
Collinsville, ILPrice Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Quality Installation
Swansea, ILFree assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Glass Doctor of St. Charles, MO
St Charles, MOPrice Transparency
Educational Website
Good Customer Service
Services Offered
Custom Glass
Energy-Efficient Options
Window Repair
Window Replacement/Installation
Glass Showers
Mirrors
Glass Repair
Tempered Glass
Glass Doors
Mills Window & Door Showroom
Fenton, MOPrice Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Jacob Sunrooms, Exteriors & Baths
Fenton, MOFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Fiberglass Frames
Window Replacement/Installation
Glass Showers
Vinyl Frames
Energy-Efficient Options
Jones Home Improvements
Cottleville, MOGood Customer Service
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Lyons Glass Company
Alton, ILFree assessment
Price Transparency
Good Customer Service
Services Offered
Glass Repair
Window Replacement/Installation
Glass Showers
Mirrors
Tempered Glass
Glass Doors
L&D Wilson's Siding & Roofing Inc
Lebanon, ILGood Customer Service
Price Transparency
Timely Service
Free assessment
Services Offered
Double-Hung
Window Repair
Window Replacement/Installation
Energy-Efficient Options
Calculate how much you can expect to pay for window installation and replacement in St. Ann, 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 St. Ann Saves You Money
By upgrading to energy-efficient windows, you and your family can enjoy several benefits, including:
- Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.
- Protect your investment: When you have an older home, your windows could also be outdated or leaky. Keeping your windows up to date is an important part of maintaining your property and its value.
- Save on energy bills: According to the Department of Energy, heat gained or lost through windows accounts for about 25-30% of household energy use. Installing energy-efficient models can help decrease how much energy is used in your home, therefore saving you about 12% more on your bills.
- Decrease your carbon footprint: Since energy-efficient windows improve the insulation in your house, you can lower your indirect greenhouse gas emissions by about 12%, according to Energy Star.
Estimated Cost of Window Replacement in St. Ann
Windows come in varying shapes and sizes, so costs and services will vary remarkably. Here are the typical costs and services that you’ll find from window installation companies.
How Much Do New Windows Cost?
Though the typical cost to replace a single window is around $600, it can range anywhere from $200 to $1,200. These estimates vary based on the specifics of your installation, like type, size, number of windows, material, the location of your home and more.
Keep in mind that energy-efficient windows may cost more upfront, but Energy Star estimates the upgrade will save you between $101 and $583 a year when installing single-pane windows and between $27 and $197 per year when installing double-pane, clear glass windows. These savings vary based on your local climate, energy rates and individual home characteristics.
Costs will also vary depending on the material you choose for your window frames. Aluminum frames cost the least. They’re sturdy, light and easy to maintain, but provide poor insulation. Vinyl frames are a bit more expensive and provide good insulation. Composite frames made using wood fibers encased in plastic also offer good insulation and are moderately expensive. Wood frames cost the most and are the most in-demand. They’re also aesthetically pleasing and offer decent insulation for your home.
What Services do Window Installers Offer?
The first question to ask yourself when considering a window replacement is: Do you need a full-frame installation or a pocket installation?
Full-frame installations are usually done when you want a new style or your window has significant rot or deterioration. With this service, your professionals will replace the complete window, including the sill, trim and frame. Pocket installations (or retrofits) involve installing a new window within its existing frame, which makes pocket installations less labor-intensive and costly. However, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.
Your window installation company should be able to help you figure out which type of installation you need.
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 St. Ann
In our hunt to find the most reliable, eco-friendly window installers in St. Ann, EcoWatch assessed dozens of companies before settling on these. Along with energy efficiency, we assessed several window installers in St. Ann and ranked them using the following methodology:
Service Area
Because this is a guide for St. Ann, we paid more attention to companies that provide services to the city. There are certainly other reputable providers that didn’t make the list because of the low odds that they would serve the average homeowner in St. Ann.
Work Quality
When it comes to new windows, the quality and variety of services often plays just as important of a role in overall efficiency and performance as the brand you choose. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
Another self-explanatory yet super important review factor is customer feedback. If most customers don’t have positive feedback about their experience with a certain company, it won’t be featured on EcoWatch.
Cost
Cheaper windows don’t necessarily mean better windows, but we know many of our readers try to keep costs as low as possible. When analyzing providers’ prices, we gave higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
Protecting your investment in new windows is important. That’s why window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Due to St. Ann’s climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of St. Ann window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
St. Ann, MO Window Replacement FAQs
What is the average cost to replace windows in a home?
The national average cost to replace a single window is about $600 but can range from $200 to $1,200, depending on a few different factors. The price is often influenced by the location of your property, the size of the window and the type and material of the window. Also, keep in mind that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.
What type of window is the most energy-efficient?
A window’s energy efficiency is affected by a number of factors, including the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually 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’re handy and have the time needed to replace your own windows, we recommend hiring a professional installer. The process of installing windows is complex and can take anywhere from four to six hours for one window. Although it’s tempting to try to do it yourself to save money, hiring a company is a faster, more efficient and safer alternative.
When is the best time of year to replace windows?
Replacement windows can be installed at any time, but warmer weather is typically better. No matter when you install them, the contractors will take steps to ensure that too much hot or cold air doesn’t get into your home, so the temperature outside isn’t necessarily a big factor. What’s more important than the temperature is that the weather should be dry.