A modular seating kit for producing a modular seating apparatus, comprising one or more rectangular base platforms, at least one connecting bracket, one or more vertical supporting structures, one or more secondary vertical supporting structures, a plurality of fasteners, and one or more support legs, each base platform has a plurality of attachment points adapted to receive the support legs and fasteners, the vertical supporting structures and the secondary vertical supporting structures are adapted to be attached to one of the base platforms to function as backrests or armrests, and two or more of the base platforms are adapted to be linked together using the connecting brackets to provide the modular seating apparatus with expandable seating capacity.