# O’Fallon, MO

Canonical: https://www.pennywindowstl.com/service-area/ofallon/

![New casement windows installed in an O'Fallon home](https://www.pennywindowstl.com/wp-content/uploads/penny/photos/casement-project/casement-project-2-1920.webp)

O'Fallon, MO

# Windows & doors in O'Fallon.

Growing O'Fallon neighborhoods served the same way as everyone else: an honest estimate and our own crew on your house.

[Get a free estimate](/estimate)[(314) 867-4355](tel:+13148674355)

## The windows O'Fallon asks for

We're a St. Louis window and door company that's been family-owned since 1953. We bring the same crews and the same standard to O'Fallon that we hold at home, whether it's a single window, a new front door, or a whole-home replacement.

O'Fallon is one of the fastest-growing corners of the metro, full of newer subdivisions where efficient, easy-to-use windows matter. Casements crank open over a counter and seal tighter than any other style, which is why they are a favorite over kitchen sinks out here. We set them square and weathertight for the long haul.

### Double-hung windows

The St. Louis classic: both sashes open, both tilt in to clean.

[Learn more](/window-styles/double-hung)

### Casement windows

Crank-out windows that seal the tightest and catch a breeze.

[Learn more](/window-styles/casement)

### Sliding windows

Horizontal sliders that glide open easy, great for wide openings.

[Learn more](/window-styles/sliding)

### Bay & bow windows

Projecting windows that add light, a view, and a little room.

[Learn more](/window-styles/bay-bow)

### Picture windows

Fixed windows that frame a view and flood a room with light.

[Learn more](/window-styles/picture)

### Basement & hopper windows

Tough, tilt-in basement windows that seal out water and air.

[Learn more](/window-styles/basement-hopper)

![Close view of new vinyl windows on a St. Louis home](https://www.pennywindowstl.com/wp-content/uploads/penny/photos/vinyl-windows/vinyl-windows-1-1920.webp)

Most requested in O'Fallon

### Vinyl windows in O'Fallon

Low-maintenance vinyl windows built for O'Fallon's newer homes: energy-efficient, easy to live with, and installed clean and fast by our own crews.

[Explore vinyl windows→](/windows/vinyl-windows)

### Why O'Fallon calls us

- Family-owned and operated since 1953
- Free in-home estimates
- No subcontractors, our own install crews
- Limited lifetime warranty
- Most installations completed in 1 to 2 days

## Recent work in O'Fallon

[![An O'Fallon kitchen with new casement windows over the sink](https://www.pennywindowstl.com/wp-content/uploads/penny/photos/casement-project/casement-project-1-1200.webp)

Casement windows

### Casement windows over the kitchen sink](/projects/casement-kitchen-windows)

### Areas we serve in and around O'Fallon

- WingHaven
- Dardenne Prairie edge
- Lake Saint Louis corridor
- near T.R. Hughes Ballpark

### Nearby towns we cover

We install windows, doors, and siding across the metro. Just outside O'Fallon, we also work in:

- [Windows & doors in Wentzville→](/service-area/wentzville)
- [Windows & doors in St. Peters→](/service-area/st-peters)
- [Windows & doors in St. Charles→](/service-area/st-charles)

## Ready for new windows in O'Fallon?

Tell us what you’re thinking about and we’ll set up a free in-home estimate. Our own crews, a straight price, and a limited lifetime warranty.

[Get a free estimate](/estimate)[(314) 867-4355](tel:+13148674355)