We’re redefining how St. Louis homeowners buy residential windows, and here’s why…. no more pushy salespeople selling you overpriced windows! With us, you get high-quality replacement windows for less than what the “big brands” sell them for because we DON’T pay salespeople to drive all over St. Louis, giving homeowner after homeowner the “hard sell.” Our reputation speaks for itself. With hundreds of happy customers, dozens of five-star reviews, and an A+ rating with the BBB, it’s easy to see why Zen Windows is one of the fastest-growing residential window companies in the nation! We’ve installed thousands of new windows for hundreds of happy clients in St. Louis. We install high-quality windows for a fraction of the cost of Andersen or Pella windows. Our customers love our no-hassle window replacement sales process, and we think you will too. Check out some of our recently completed window replacement projects below, and then call us for your fast, free, accurate quote.