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Window Replacement In O’Fallon, Missouri


You can design the home of your dreams with the help of Window World of St. Louis. We offer high-quality replacement window styles, door styles and siding styles that will fit your unique taste. You’ll find that our American-made windows improve your home’s energy efficiency while enhancing curb appeal. Plus, our products are covered by a lifetime warranty. Call us today to schedule a free in-home estimate.

Completed Projects in O-Fallon, Missouri

Replacement Windows in O’Fallon, MO

replacement windows from window world of saint louisLooking for replacement windows for your O’Fallon home? Browse the wide selection of window styles at Window World of St. Louis, from double hung to bay & bow designs. Not only will you enjoy our budget-friendly prices, you’ll notice savings on your energy bill! See our American-made window designs now.

Replacement Doors in O’Fallon, MO

replacement door from window world of saint louisA new door is just what your home needs! Our beautiful entry doors and patio doors will make a big impact and impress your guests. With a variety of design options, you’re sure to find a style that fits your home perfectly. All while lowering your energy bill! Enjoy a professional installation and a lifetime warranty. View our door styles.

Replacement Siding in O’Fallon, MO

replacement vinyl siding from window world of saint louisWindow World of St. Louis also offers several vinyl siding products, each offering unique benefits for your O’Fallon home. Choose between Prodigy®, 4000 Energy Plus, 4000 Reinforced, and 2000 Vinyl Siding. You’ll coat your home in a layer of protection and lock in energy savings! Explore our siding products.

Boost your home’s curb appeal with Window World’s replacement products. Call Window World St. Louis To Learn More!

O’Fallon, Missouri Customer Reviews

  • Working with customer service and installation has been wonderful. Our windows are beautiful. No issues with anything! Prompt, courteous and professional.
    Sue Z.
  • WW came out last week – installed 9 windows – They guys were fantastic – they came in, did the job, cleaned up, and answered my questions. They were polite and were NOT creepy installers! I would and have recommended them to my coworkers. At this time I give them a 5+ star rating!
    Terrie H.
  • We had new windows installed June 2nd and the entire process was smooth and successful. I met with the salesman and he explained everything in detail…the style of windows offered, the quality, various options for increasing heating and cooling efficiency, etc. We can’t believe what a difference the new white windows make it looks like a new house!
    Karren S.
  • Clint is one of the most stand up/honest people I have ever met or had the pleasure of doing business with. I cannot wait for the weather to break and have him and his crew(hopefully you guys take requests!) out to take care of the windows at our new house! Would recommend anyone to this business just because of Clint!
    Clayton S.