Quality Replacement Windows in St. Louis

STL Windows and Doors is your trusted window contractor for replacement windows in St. Louis. We offer energy-efficient, beautifully crafted residential windows designed to enhance both the comfort and style of your home. High-quality windows are not only better for insulation, but they also improve your home’s curb appeal.

With 65 years of combined experience, our in-house team of certified installers ensures that every installation meets the highest standards — see for yourself how we mark out and bend the metal for a precise fit, and how we prep the sill before every install.

Whether you’re looking to improve insulation, update your home’s exterior, or increase property value, we provide durable, long-lasting window options. Get a fast and free in-home estimate today.

  • A 10-year workmanship warranty on every window installation.
  • Limited lifetime transferable product warranty*.
  • Family-owned and operated with a 4.9-star rating
  • Friendly service – competitive pricing – great selection
ProVia Awning & Casement Replacement Windows
Whole Home Window Replacement with Double Hung, Slider, and Picture Windows

St. Louis Window Replacement Experts


If you’re looking for a window and door replacement company in St. Louis, MO, STL Windows and Doors is the best choice as a Platinum ProVia Dealer, offering top-quality, energy-efficient windows built to last.

ProVia windows offer a high level of customization, ensuring you get the exact style and features that match your needs. With professional-class standards, these American-made windows have all the latest must-have features that homeowners want.

To get your window replacement project started, begin with an in-home evaluation to help you select the right products before placing your order. Our in-house team of St. Louis window installers will handle the entire process to ensure a great experience — see a recent whole-home window replacement project we completed. If you want a deeper understanding of the process, costs, and what to expect, review our guide, Window Replacement: The Buyers Guide for St. Louis Homeowners (2026).

WINDOW STYLES & Designs

Looking for windows that combine energy efficiency with beautiful style? Our ENERGY STAR® certified replacement windows come in classic, modern, and custom designs to match your home and budget.

We install all popular window styles, including double-hung, slider, casement, hopper, picture, garden, bay & bow, and custom architectural shapes. Every window is custom-sized and professionally installed for a tight fit that reduces drafts, improves comfort, and helps lower energy costs.


Double Hung Windows

Double-hung windows are the most commonly installed replacement windows.  They are adjustable and flexible by nature. Choose whether you want the top, bottom, or both windows open and the height. If you’re comparing features, performance, and value, check out our in-depth guide to the best double hung windows.

Double-hung windows benefit from enhanced energy efficiency when closed because of their airtight seal. A hinged wedge lock increases security, allowing you to open the window slightly (keeping people out) while letting in the fresh air.

Additional configurations available

Double Hung Configurations

SLIDER WINDOWS

Slider windows are a wise choice when you want expansive, open views with smooth, easy operation. The sash glides horizontally along a track, so you can open one side or both for flexible ventilation without a window swinging in or out of your room.

When closed, quality slider windows create a tight seal that improves energy efficiency and keeps drafts out. They’re also simple to clean and an excellent fit for larger window openings, making them a popular upgrade in living rooms, bedrooms, and basements.

If you like the feel of fresh air and want to control the airflow in your home,  casement replacement windows are a perfect choice—casement windows open from the side rather than top or bottom.

They have a smooth hinge or crank that allows ventilation in your home at your demand. They are the best option for comfort and will enable you to be in control all year round.

Additional configurations available

CAsement & Awning Configurations
CAsement & Awning Configurations

The hopper window is small yet perfect for basements, bathrooms, or laundry rooms. Hopper windows open downward and inward.

The upward tilt of the glass pane prevents dirt and debris from entering your home. Hopper windows give you adequate ventilation and natural light.

>> What is a hopper window?

PICTURE WINDOWS

ProVia picture windows bring your home the best of both worlds.  Enjoy beautiful views while enjoying excellent efficiency from their insulation.

Picture windows provide beautiful natural light without obstruction and can contribute to energy savings.  

Additional configurations available

ProVia Picture Windows

GARDEN WINDOWS

ProVia garden windows are an excellent option if you’re looking to bring copious amounts of natural light into your home, particularly your kitchen.  

Garden windows extend outward, offering space and light from above. Garden windows provide plenty of sunlight and fresh air and are a great way to bring the beauty of outdoor plants and flowers indoors.

BAY & BOW WINDOWS

Bay windows and bow windows let you showcase your beautiful views.  Bow windows extend beyond the interior wall, bringing in natural light while opening up the room and giving a wider view.

Bay windows extend space, allowing you to add personal design touches like pillows or plants and improve your home’s aesthetic appeal.

Additional configurations available

Bay & Bow Window Configurations

ARCHITECTURAL SHAPES

Our architectural-shaped windows give you the freedom to express your style.  If you’re looking for a unique and personal design that offers a distinctive style to make your home stand out, these are your windows. 

From pre-finished wood to economy redefine, you’re going to love these windows.

Additional configurations available

Architectural Window Configurations

View Our Products Brochure

WINDOW COLORS & FINISHES

Browse through a sample of replacement window colors and finishes.  ProVia provides an array of beautifully crafted art glass, privacy glass, decorative glass, window blinds, padlocks, and window grids to make your St. Louis home look beautiful. You can count on us to bring all the necessary product samples!  When you’re ready to take your next step, request a free in-home consultation.

Oak Wood Species

Cherry Wood Species

Maple Wood Species

ProVia’s custom glass windows include hand-stained designs, allowing you to express your style while bringing added curb appeal to your home. Every Inspirations Art Glass piece is made by hand, offering natural characteristics for the best-in-class, hand-made windows.

Provia Art Glass - Stained Glass Window of Red and Blue Star

Disclaimer:  Your sales representative will show you all the available colors and finishes for any window model you desire.

BE INSPIRED

Inspiration WINDOW GALLERY

Please browse through our ProVia Windows gallery for inspiration! Photos include various models. Ask one of our window specialists for full specs.

WE ARE Highly Rated

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Jeff Gordon profile picture
Jeff Gordon
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Peyton and Max installed 21 new windows and a new front door. They were a pleasure to work with, especially since we had other home improvement projects going at the same time. They did meticulous work and answered all of our questions.
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Mike Kelly profile picture
Mike Kelly
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I had a great experience with STL Windows and Doors. They we're booked up initially, but they still were able to setup an appointment and put me on the schedule. This company has great prompt customer service, fair pricing, and great professionalism. I would highly recommend their service.
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Anne Croy
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Excellent service with initial sale and installation!! High quality product.
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Vivian Saied profile picture
Vivian Saied
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I used Stl windows and doors to replace half of the windows in my house and a sliding door. The whole process was excellent. From talking with Dan, the sale manager to the installers (Tony and his crew ) to Scheduling with Chris at the office. First of all, Chris was able to up my schedule date a week early upon my request. I'm sure he squeezed me in his tight schedule. I was very thankful. Tony and his crew were very professional, yet friendly and considerate. They were prompt on time the 3 days they came and very efficient. They took down my window treatments and put them back up again exactly the way they were. They moved furniture and put back. They took the time to explain how the windows opened from top to bottom as the windows had many options that my old windows didn't have. I would use them again and would definitely recommend them to my family and friends
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Elizabeth Purcell profile picture
Elizabeth Purcell
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Worth the wait! Price was insanely different from other bids for a single window replacement. Paid cash for a slightly better rate. Originally was going to need to wait 8 months for replacement but I got lucky & they fit me in at the 4 month marker since they had a cancellation. Customer service from Kaleb & Tony was outstanding. Both were very personable & made me feel confident that the job was being done well. Great warranty! Glad to check this off my list:)
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Aaron Fox profile picture
Aaron Fox
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STL Windows and Doors did an excellent job with our window replacement project. We live in an older home (over 100 years old) and we know there are going to be issues related to its age. The STL Windows and Doors team worked extremely hard with us to replace one of our bathroom windows that had begun to show signs of water damage. After the initial window replacement project was finished, we did communicate with their team about concerns we had with the original window frame that remained. Chelsea worked with us and a team (Tony and Caleb) came to our house within a week and replaced the frame as well. Their prices were reasonable and they had an array of choices. Overall, we highly recommend them for any window-related project you may have!
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Jake Bloomer
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Experience was great, STL W+D replaced our old rear door and transom with a new eight-foot unit. It’s great to have this huge pane of glass looking out over the back yard. Installers were great and clean and shimmied the door in without removing our old casing and messing with the plaster. They know what they are doing!
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Randall H profile picture
Randall H
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The removal of the old window and the installation of the new window went more smoothly than I would have expected. Peyton and Max were knowledgeable, professional, and completed the installation beautifully and efficiently. Both of them did a great job with making in the new window secure, sealed, and attractive.
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T Baker profile picture
T Baker
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Premium products and service at a more affordable price. Fantastic experience at every step of the process. Had some hail and tornado damage. Jared (sales) was friendly and knowledgeable about the industry. Did not hard sell, but instead provided a balanced and very detailed explanation of STL's products and services vs competitors, which felt trustworthy. Dan (owner) came out to measure the windows. My spouse said he was friendly and answered her questions. We got an unexpected scheduling break and installed much sooner than the expected wait. The installers, Peyton and Max, were friendly, efficient, and conscientious of our home. Their finish work (sealing and caulking) is better than the original for the house. They took the time to demonstrate all the features of the new windows and how to care for them. We all noticed a defect in the glazing inside one of the window sashes, which they immediately reported to the owner who, in turn, called me immediately about the manufacturer's quick replacement. Provia warrantees the vinyl, glass, hardware and screen of the window for life and this guarantee is transferable once to a new home owner. The installation has a 10-year guarantee. Also, STL has another business for window cleaning and screen replacement, which we're going to check out.
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Jessica Klemp profile picture
Jessica Klemp
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Great company to work with! We needed four hopper windows replaced on our garage/basement and STL Windows and Doors provided the best service and most competitive pricing. The work was done quickly and professionally, and everyone we met from the company was friendly. We would recommend calling them for your window needs!

Read what Jared Maxwell had to say about replacing his 19 windows.

Shop At Our Windows Showroom

Come to us, or we can come to you. If you are in the market to buy replacement windows, we welcome you to come visit our St Louis showroom to view our window models and get the quote process started.

Before you order, we encourage our customers to talk with our staff about style selection, pricing, warranty, financing, and schedule. The goal of our owner (Andrew Lombardozzi) is to ensure every sale we make creates a happy and satisfied customer.

Our expertise extends beyond windows—we also specialize in door installation. Whether you need a new door or want to replace an existing one, we’ve got you covered!

Opening Times:

Monday: 9:00 AM–4:00 PM
Tuesday: 9:00 AM–4:00 PM
Wednesday: 9:00 AM–4:00 PM
Thursday:  9:00 AM–4:00 PM
Friday: 9:00 AM–4:00 PM
Saturday:  Closed
Sunday: Closed

Call (314) 277-5952

Directions

We recently moved our showroom to Earth City. It’s easy to find us, take I-270 north, then west on I-70, then north on Hwy 141 / Earth City EXPY.

Directions to STL Windows and Doors

If you are seeking “window installation near me”, our door & window installers gladly serve the Greater St. Louis Metro Area.

  • Affton
  • Arnold
  • Augusta
  • Ballwin
  • Barnhart
  • Brentwood
  • Bridgeton
  • Cedar Hill
  • Chesterfield
  • Clayton
  • Concord
  • Cottleville
  • Crestwood
  • Creve Coeur
  • Dardenne Prairie
  • De Soto
  • Defiance
  • Des Peres
  • Earth City
  • Ellisville
  • Eureka
  • Fenton
  • Festus
  • Flinthill
  • Ferguson
  • Florissant
  • Foristell
  • Frontenac
  • Glencoe
  • Gray Summit
  • Grove
  • Hazelwood
  • High Ridge
  • Hillsboro
  • House Springs
  • Imperial
  • Kirkwood
  • Labadie
  • Ladue
  • Lake Saint Louis
  • Lemay
  • Lowry City
  • Manchester
  • Maryland Heights
  • Mehlville
  • New Melle
  • O’Fallon
  • Oakville
  • Old Monroe
  • Olivette
  • Overland
  • Pacific
  • Pevely
  • Richmond Heights
  • Saint Albans
  • Saint Charles
  • Saint Louis
  • Saint Peters
  • South County
  • St. Paul
  • Sunset Hills
  • Town and Country
  • Troy
  • Union
  • Valley Park
  • Villa Ridge
  • Warrenton
  • Warson Woods
  • Washington
  • Webster Groves
  • Weldon Spring
  • Wentzville
  • Wildwood
  • Winfield

Frequently Asked Questions About Replacement Windows

Here are some frequently asked questions about replacement windows.  If you have other questions, please get in touch with us!

When working with a replacement window professional, any time is the best to replace windows, as professionals have the experience and tools to get the job done right, no matter the season.

We would say yes since your windows are responsible for up to 30% of your home’s heating and cooling use. Investing in new windows that are energy-efficient will save an estimated $125 to $340 a year alone.

The standard lifespan of windows is 15-20 years. Once they have reached this age, window seals weaken and fail, which causes drafts (a common issue in older homes) and water seepage. We recommend replacing your original windows every 15-20 years to maintain energy efficiency and reduce energy costs.

GRAB A DEAL & FREE ESTIMATE

Ready to take the next step?  Pick a deal on our free estimate form if you live in or around St. Louis!  You can count on us!