Photographed by Julia Sperling for Lonny.
First Things First
We'll start with the most eye-catching aspect of the space, the wallpaper. The trick to making wallpaper work for the bathroom, Katie advises, is to opt for vinyl. It’s non-absorbent, so it can withstand wetness and humidity.

Also anchoring the bathroom is the lemon-yellow vanity. The thing to keep in mind — the way a vanity looks in the store is only a starting point! What you see here is a Restoration Hardware piece Katie customized with a fresh coat of paint and new hardware.

The shower curtain is Quiet Town and the bath mat is from Target.