Your windows needs are as unique as your home. For more than 20 years, Keller Windows has provided the St. Louis area with custom solutions for all their window needs. We understand that windows are a large commitment of both time and money. We work closely with clients to ensure they receive the top-quality service and windows they deserve. Whether you are looking to install new windows or repair existing once, Keller Windows is ready to help.

Keller Windows specializes in replacement windows and patio doors from Andersen®. Andersen® is well-known for its superior quality and value. Keller Windows is proud to work exclusively with Andersen® for our customers’ window and door needs. We are also proud to be one of only 30 certified Andersen® installers in the country. This certification is extremely important in ensuring that your windows are installed correctly and that you’re getting the most out of your windows.

We also offer Andersen® Windows at a significant discount from our competitors, up to 30% off their price. One thing we do not do at Keller Windows is listed absurd retail prices and offer steep discounts. Instead, we simply offer a low, transparent price right off the bat. We keep our overhead as low as possible and pass the savings on to you. There are no gimmicks or high-pressure sales tactics at Keller Windows. We also work with all insurance claims to make that process as seamless as possible. There is also a limited owner-to-owner warranty on Andersen® Windows, which can greatly increase the resale value of your home.

We offer the Full Andersen Line to Meet Any Budget

  • 100 Series – All Fibrex
  • 200 Series – Solid wood frame construction clad w vinyl for durability
  • 400 Series – Our top selling line

We will come to your home examine your needs and give you a fair quote for our services. There is no hard-sell or pressure to user Keller Windows. We believe the quality of our work and the quality of our windows puts us head-and-shoulders above our competitors. Keller Windows offers the value for high-quality window installation in the St. Louis area.

No matter what style or material you would like for your windows, Keller Windows can help. We offer a Fibrex exterior, which is known for its beauty and durability. For the interior, we offer pine, maple, or oak. There are also pre-finished white interiors available. These options are available in both A Series and E Series. The A Series is an Architecture Series; where innovation meets beauty. The E Series allows you to design your windows for your custom needs. No matter what your taste or style, Keller Windows has the windows for you.

At Keller Windows, we offer same-day service to get your window situation resolved as quickly as possible. Whether it’s a broken window, a mechanical problem, or a full installation, we are quick and responsive to our customers. To discuss your window needs, contact Keller Windows right away.

Schedule Today For Our Integrity Pricing Promise & Free In-Home Estimate


Our Everyday Prices
Beat Their "Sale" Prices
by 20-40%

Robert- St. Louis, MO

“Keller Window & Door is a fantastic company to do business with. The service I had done was completed quickly and at a fair price. I would definitely recommend this company for window and doors.”

Vern & Steve- St. Louis, MO

"John Keller gave us exceptional service. He didn't pressure us to buy replacements but gave us a good price to replace 2 rotten sash. Why buy whole windows when the remainder is good? He fulfilled all time estimates and his installation was quick and immaculate! We highly recommend him!"

Audrey- St. Louis, MO

"Keller Windows delivered an excellent product on time. Representatives and workers were courteous and professional. I will definitely use Keller Windows in the future."


We think St. Louis is smarter than most of the gimmicks out there. Our everyday pricing will beat the other guy’s so-called “sale price” by 20%-40% EVERY TIME!

Give us a call & see just how much you can save!


87 Grasso Plaza #246
St. Louis, MO 63123

(314) 399-2001

Areas Served - St. Louis, Chesterfield, Town & Country, Clayton, St. Charles, Wildwood. University City, O'Fallon


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Some photos reproduced under license from Andersen Corporation for a specific & limited purpose.