A litter box is mounted on a building outer wall having an opening formed thereon that is in communication with the building interior. The litter box includes a housing having a motorized drawer received therein and an open front that is aligned with the wall opening. When a sensor determines that a cat is nearby, a controller automatically extends the drawer into the building interior. When the sensor determines that the cat has left the area, the controller retracts the drawer into the housing and activates a waste comb to propel waste products into an underlying receptacle.
