Our top pick, the Petsfit Single-Story Outdoor Cat House, is well-insulated and waterproof. If you're looking for extra warmth during the coldest months of winter, we recommend The Kitty Tube ...

If your catio isn’t outside a window, you’ll need an easy way for your cats to access the space. A cat door can be put in any door or wall to give your cat a spot to enter the catio.