Abstract: A pet outhouse is provided for use with a building having an opening formed in a wall thereof. Also included is a tray having a bottom face and a peripheral lip coupled to a periphery of the bottom face and extending upwardly therefrom for defining an open top and an upper peripheral edge. The tray is accessible via the opening in the wall of the building and pet litter is situated within the tray. A roofed housing is provided including a side wall with an open bottom defining a lower peripheral edge which is removably coupled to the upper peripheral edge of the tray for covering the same. The housing further has a hole formed therein for being accessed via the opening in the wall of the building.