Location

St. Louis, MO

Enhance your St. Louis home with Performance Windows. Built to handle the region’s wide range of weather—from hot, humid summers to cold winters—our windows provide dependable energy efficiency, durability, and year-round comfort.
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HOMEOWNERS LOVE US

Over 10,000 Happy Customers

We love our customers, and it turns out, the feeling is mutual.

Ready for a 5 star review of your own?

OUR PROCESS

A Simple, Stress-Free Window Replacement Experience

New windows, no-nonsense. Here’s what to expect when working with Performance Windows.

Free Consultation

Skip the 3-hour, high-pressure sales pitch. We’ll answer questions in under an hour.

Measure & Make

Luxury windows, carefully measured, custom made, and designed to fit perfectly.

Fast Installation

Our expert installers complete the job quickly and correctly. Typically in just one day.

Enjoy the Upgrade

Say “goodbye” to drafty rooms and extreme temperatures and “hello” to year-round comfort.

Ready to replace those old windows? Upgrade your home and your life.

A Lifetime Warranty 
That — wait for it — 
Lasts a Lifetime

Our windows are built to last by Alside, a US manufacturer with 75 years of experience. And we stand behind them. All our standard window options are covered for life by Alside’s Manufacturer’s warranty.

Portfolio

Featured Installations Near St. Louis

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Colorado, Double Hung, Picture Windows, Slider
Colorado, Double Hung, Picture Windows, Slider

Ready to start your project?

St. Louis

Blake B, Manager

With timeless design and lasting performance, Performance Windows is a trusted choice for homeowners throughout the St. Louis area.

Contact Performance
Windows in St. Louis

Performance Windows provides the highest-quality windows at a fraction of the price. Are you ready to improve the value, comfort, and energy efficiency of your home?

Contact Us for a Free Quote

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