20 Best Window Companies in Mehlville, MO (2025 Reviews)
Thinking about upgrading your home's windows? We’ve got all the information you need in this guide to the top window installation companies.
We analyzed all the top-rated window companies in Mehlville and selected the best 20 based on:
Customer reviews
Window installation expertise
Popularity with home-owners like you
Please enter a valid 5-digit zip code!
Why you can trust EcoWatch
Whether you're doing home renovations or have windows that need repairs, windows play a vital role in conserving your home's electricity. When it’s the middle of summer, your old and drafty windows could be making your home more difficult to cool and costing you more in power bills.
Luckily, helping you save energy with more efficient windows also helps our goals of reducing energy usage for the environment.
Unlike other review sites, EcoWatch ranks window replacement companies on energy efficiency while also balancing 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 Mehlville
The EcoWatch Reviews team evaluated dozens of providers that service the Mehlville area to find the top window installation companies by our standards. We assessed the companies based on energy-efficient offerings, price, local experience, coverage area, 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 has windows expertise in Mehlville. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has over 27 years of experience in the windows industry, and it currently provides services to 200 locations nationwide.
Window World may be the company for you if you want one that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World 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 windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in Mehlville?Window World does not mention prices on its website, but it's known for offering some of the most affordable window installations around. You can ask for a free quote on its website for more information about the cost.

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 has the best availability in Mehlville. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has over 27 years of experience in the windows industry, and it currently provides services to nearly every state except Mississippi and West Virginia.
Andersen may be the company for you if you want one 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 make sure you mention that you’d like Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Mehlville?Andersen does not mention prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. You can ask for a free quote on its website for more information about the cost.

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 has the best residential windows in Mehlville. 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 experience in the windows industry, and it currently provides services to residents within 75 miles of its showrooms, which are in 13 states.
Window Nation may be the company for you if you want one 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 windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window Nation cost in Mehlville?Window Nation does not mention prices on its website, but based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. You can ask for a free quote on its website for more information about the cost.
We’ve recommended installers with shining reputations, but bear in mind that these are national companies, 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 Companies in Mehlville
Renewal by Andersen
Maryland Heights, MOGood Customer Service
Free assessment
Timely Service
Educational Website
Price Transparency
Services Offered
Bay Windows
Double-Hung
Window Replacement/Installation
Skylights
Glass Doors
Champion Replacement Windows of St. Louis
Fenton, MOFree assessment
Good Customer Service
Price Transparency
Services Offered
Double-Hung
Window Replacement/Installation
Bay Windows
Glass Doors
Window Nation
Overland, MOFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Bay Windows
Window Replacement/Installation
Energy-Efficient Options
Double-Hung
Glass Doors
Custom Window Designs
Vinyl Frames
Colonial Construction
St. Louis, MOEducational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Building Envelope Experts
Fenton, MOPrice Transparency
Timely Service
Free assessment
Educational Website
Good Customer Service
Services Offered
Double-Hung
Glass Doors
Window Replacement/Installation
Custom Window Designs
Vinyl Frames
Energy-Efficient Options
Bay Windows
Chaney Windows And Doors
Maryland Heights, MOEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Vinyl Frames
Wood Frames
Energy-Efficient Options
Window Replacement/Installation
Bay Windows
Glass Doors
Gateway Door and Contracting
St Charles, MOGood Customer Service
Educational Website
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Windows Doors & More LLC
St Charles, MOGood Customer Service
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Home Comfort Exteriors
St Peters, MOFree assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Cardinal Contractors
St. Louis, MOFree assessment
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Quality Installation
Swansea, ILFree assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
STL Windows and Doors
Earth City, MOTimely Service
Price Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
Bay Windows
Double-Hung
Butler Home Improvement
Collinsville, ILPrice Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Gateway General Contractors
O'Fallon, MOEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Mills Window & Door Showroom
Fenton, MOGood Customer Service
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Glass Doors
Jacob Sunrooms, Exteriors & Baths
Fenton, MOFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Fiberglass Frames
Glass Showers
Window Replacement/Installation
Vinyl Frames
Energy-Efficient Options
Glass Doctor of St. Charles, MO
St Charles, MOPrice Transparency
Educational Website
Good Customer Service
Services Offered
Glass Repair
Tempered Glass
Glass Showers
Mirrors
Custom Glass
Glass Doors
Window Repair
Energy-Efficient Options
Window Replacement/Installation
Jones Home Improvements
Cottleville, MOGood Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
L&D Wilson's Siding & Roofing Inc
Lebanon, ILPrice Transparency
Free assessment
Good Customer Service
Timely Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Double-Hung
Window Repair
Lyons Glass Company
Alton, ILPrice Transparency
Good Customer Service
Free assessment
Services Offered
Glass Doors
Glass Repair
Window Replacement/Installation
Mirrors
Tempered Glass
Glass Showers
Calculate how much you can expect to pay for window installation and replacement in Mehlville, 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 Mehlville Saves You Money
Upgrading to energy-efficient windows can improve the comfort of your home and help you save on energy bills. Here are more details about how switching out your windows could benefit you:
- Save on power bills: Once you switch to energy-efficient windows, you can expect a reduction in your bills by about 12% since you’ll require less energy to heat or cool your house.
- Reduce your carbon footprint: By using less energy after switching to energy-efficient windows, you’ll also be reducing your carbon dioxide emissions by about 12%, according to Energy Star.
- Protect your investment: The older your home is, the more likely it is that switching to energy-efficient windows will benefit you. Older homes usually have windows that are outdated, leaky or maybe even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
Estimated Cost of Window Replacement in Mehlville
When researching window installation, each company provides different services and prices. Let’s take a look at some average costs and services.
How Much Do New Windows Cost?
According to our market research, the typical cost of installing a single window is around $600. However, window installation costs can range from $200 to $1,200 for each window. These estimates vary based on specific characteristics of your installation, like material, type, the location of your home, size, number of windows and more.
With windows, efficiency is one of the most important factors for many homeowners. Windows with higher efficiency may cost more off the bat, but by increasing the efficiency of your home — particularly during the summer and winter — they can provide many years of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save Mehlville homeowners $376+ each year after replacing single-pane windows.
Asking for free quotes from multiple companies is the best way to find out which one will work best for your budget.
What Services do Window Installers Offer?
The first thing to ask yourself when considering a window replacement is: Do you need a full-frame installation or a pocket installation?
A full-frame installation is a replacement of the full window. It involves removing the old window, the sill, and the exterior and interior trim. It can also involve additional materials, including insulation and drip edges, which increase the total cost of the project. It’s also worth noting that you may have to touch up the paint surrounding the window after a full-frame installation. Pocket installations (or retrofits) involve installing a new window within the existing frame, which makes pocket installations more simple and affordable. However, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.
Your window replacement company should be able to help you understand what’s best for your needs. In Mehlville, the decision will mostly be based on how old your windows are and if there’s any damage. Wood can decay if not maintained properly over the years, so it’s a good idea to have a professional examine your frames and window sills.
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 Mehlville
In our search to find the most reliable, eco-friendly window installers in Mehlville, the EcoWatch team assessed dozens of companies before settling on these. Along with energy efficiency, we reviewed window companies all across the state and ranked them based on the following methodology:
Service Area
Since this is a guide for Mehlville, we paid more attention to companies that provide services to the city. There are other reputable providers that didn’t make the cut because of the low odds that they would serve the average homeowner in Mehlville.
Work Quality
When it comes to new windows, the quality and variety of services can often play just as important of a role in overall efficiency and performance as the type of window you choose. We do give window installers more points if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
Customer feedback is another very important review factor. If most customers don’t have good feedback about their service from a certain installer, you won’t see it featured on EcoWatch.
Cost
This one is a give-and-take: as with other services, cheap window installers may not provide the most quality service. Still, we want to ensure we’re highlighting companies that provide a range of price and financing options so they’re accessible to most homeowners.
Warranty
As discussed, windows are a considerable investment, so you’ll want to be certain that investment is protected. Window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Due to Mehlville’s climate, homeowners need to be wary of low efficiency, rot and water damage. We factored in local experience to reflect the ability of Mehlville window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Mehlville, MO Window Replacement FAQs
How much should a window install cost?
The typical cost of installing a window can range between $450 and $650. There are a variety of factors that affect how much it costs, including how energy-efficient the windows are, local labor costs, styles and sizes of windows, the materials used in designing the windows, your property’s location and the number of windows.
What kind of window is the most energy-efficient?
A window’s energy efficiency depends on a variety of factors, including the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are typically the most energy-efficient and are certified by the U.S. Department of Energy.
What services do window replacement companies offer?
Window installation professionals will do the entire process — from replacing your old windows with brand-new ones to cleaning up after the installation. In addition, some companies offer window manufacturing, customization and repairs.
What time of year is the best time to replace my windows?
Though you can install windows any time of year, warmer weather is usually better for installing replacement windows. Additionally, it shouldn’t be raining, as rain can make the installation more difficult.
Should I replace all my windows at once?
If your windows are greater than 20 years old, you most likely need to replace all of them. At that point, they are typically less efficient, leakier and/or more damaged than new windows. Replacing your windows all at the same time will involve less paperwork and less time.