Abstract: An integrated modular assembly for facilitating cohabitation with house pets, particularly cats and dogs, who normally live under conditions of semi-freedom in the lodgings of their master. The assembly includes a movable support which may even be transportable, and a collection of interchangeable modules carried by the support and fulfilling a number of functions among which are required arrangement in a given space, fulfilling bodily conveniences, stimulating instincts and/or simulating a presence, with the combination of selected modules responding to the particular needs of a given house pet for providing for the house pet a territorial refuge, vital comforts, mental and physical exercise, and/or friendship.