STL Windows & Doors: The Preferred Window Installation Company in St. Louis

We’re a family-owned and operated window installation and door installation company in St. Louis, MO. With over 65 years of combined experience and the most skilled installation experts, we ensure you always receive the quality and value you deserve.

Our Provia windows are made in the USA, ENERGY STAR® certified, and backed by a limited lifetime transferable warranty.

We prioritize delivering what homeowners value most: competitive pricing from a trusted source backed by stellar reviews, 2026 ProVia Platinum and certified window and door installers, friendly service, and a broad selection of energy-efficient products in all the top styles. Get a fast and free in-home estimate today.

A Leading St. Louis Window Installation Company

We’re Accredited

We're A Provia Platinum Dealer 2026
BBB Accredited A+ Rated
A Rating with Angie's list
EPA Certified Renovation Firm
HomeAdvistor Top Rated Window Company

We’re proud to be a HomeAdvisor Top Rated and Elite Service provider with a track record for excellence in quality, value, and customer service.

Our high recommendation rate and recognition by Forbes.com as one of St. Louis’ finest window contractors speak volumes about our dedication.

You can count on us to deliver a satisfying experience when replacing your windows and doors.

and 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 profile picture
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 profile picture
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!
ProVia Window Installation from STL Windows & Doors
get new windows installed by the professionals

REPLACEMENT WINDOWS

Enhance your home with ProVia’s top-quality, American-made replacement windows. Discover unparalleled beauty and durability in our diverse range of styles.

TYPES OF REPLACEMENT WINDOWS WE Install

Explore our selection of ProVia energy-efficient windows, including casement windows, double-hung windows, and more, that add style and help lower your energy bills. Each style promises to transform and elevate the look of your home while also being ENERGY STAR-rated. You can trust us to handle all your windows with precision and care.

We Make Door Replacement Easy

EXTERIOR DOORS

Browse our ProVia exterior doors, combining style, security, and energy efficiency to beautifully match and upgrade your home’s exterior.

ProVia Exterior Doors

ENTRY DOOR Options

Explore our variety of ProVia doors, including steel, storm, and patio styles, each crafted for durability, beauty, and energy efficiency in your home.

Do Your Windows Need Cleaning?

Even the best windows can lose their shine without proper care. If your windows, doors, or glass storefronts are looking dull, streaked, or dusty, our sister company, STL Window Cleaners, is here to help. We provide crystal-clear window cleaning services for both homes and businesses across Greater St. Louis. From initial deep cleans to ongoing maintenance, you’ll get the same reliable care and local expertise you trust from STL Windows & Doors. Visit STL Window Cleaners.

About STL Windows & Doors Overview Video

WHY CHOOSE US As Your St. Louis Window Installers?

TEAM + PRODUCT + SERVICE.

We’re revolutionizing how St. Louis homeowners buy windows and doors. We promise transparency and unmatched value.

Our approach is straightforward, no aggressive sales, just superior installation of quality American-made products and the best warranties.

We’re committed to hiring craftsmen who care, backed by our certified training, professionalism, and commitment to quality.

Our promises are clear: to bring efficiency and beauty through our products and peace of mind through careful installations and dedicated support.

PROVIA PLATINUM DEALER

We’re committed to excellence as a Platinum ProVia Dealer 2026 and Certified Installer. We proudly offer ProVia’s superior range of windows and doors, ensuring expert installation and unmatched quality in every project.

Trust us to bring the best of American-made craftsmanship directly to your home.

ProVia windows and doors are ENERGY STAR certified, featuring insulating glass, foam-filled frames, Low-E coating, and options with the right U-factor to handle St. Louis weather while contributing to LEED certification for energy efficiency.

2026 ProVia Platinum Dealer and Certified Installers

10-Year Workmanship Warranty

When comparing window & door companies consider that we offer a 10-Year Workmanship Warranty. 

10 Year Workmanship Guarantee

We’re so confident in the quality of our window and door installations that we will back our workmanship for a full 10 years from the date of installation. 

All work is done in-house, we don’t subcontract door or window contractors. You can rely on us for excellence in quality, value, and craftsmanship.

Max Friedman, Installer
Design, Order, Install, Inspect

OUR SIMPLE YET PROVEN PROCESS

01

Talk With Pro

You can share your needs through our free estimate form, and we will contact you to schedule a convenient home visit with one of our professionals.

02

ONSITE ASSESSMENT

During our visit, we will respond to your inquiries, present various sample products, and gather the essential measurements to create an estimate.

03

DELIVER ESTIMATE

Once we have all the details, we will provide a competitive estimate with clear pricing and an expected time frame for delivery and completion.

04

COMPLETE JOB

Our team works diligently to complete projects swiftly and minimize disruption in your home. Our post-competition inspection ensures everything was done to spec.

ProVia Cost vs Value Report

INCREASE YOUR HOMES RESALE VALUE WHILE BOOSTING APPEAL

When you purchase your replacement windows and doors from us, you will receive high-quality products with a 10-year workmanship warranty and a one-time transferrable warranty.

  • Good curb appeal attracts more buyers and can help your home sell quickly.
  • Exterior home improvements can increase your home’s value.

Download the ProVia Cost vs Value Brochure for more.

Join Our Referral Program & Earn Easy Cash

Contact Us

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, and then north on Hwy 141.

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

Helpful Answers to Common Window Installation Questions

Here are some frequently asked questions about our window installation service.  If you have other questions, please get in touch with us! You can also review our complete guide, Everything Homeowners Need to Know About Home Window Replacement, to better understand the process, costs, and options available.

The average window replacement cost ranges from $500 to about $1,500 per window, with an average of $800. It all depends on the type of window you are interested in, the quality of that window, and the manufacturer of that window. There will also be installation costs per window. It is best to use our free estimate for an accurate price quote.

We’re biased, but we believe the best company for window replacement is STL Windows and Doors.  Read through our customer reviews to hear what they have to say. We offer the best windows brand and back our window installs with a 10-year workmanship warranty.

Most experts agree that if you have the budget, you will benefit by replacing all your windows at once. If your home is older than 20 years old, it may be time to start budgeting for a complete window replacement in your home.