The rapid development of infrastructure often encounters the poor subgrades and, in such soils, it is difficult to carry construction activities. Numerous counteracting methods are developed to control the swelling–shrinkage behavior of the expansive soil. The mechanical stabilization of the expansive soil by reinforcing it with the polypropylene fiber and geogrid is one of the methods of improving expansive soil. Geogrids and polypropylene fibers have been extensively used to strengthen the expansive subgrade and foundations as individuals. The polypropylene fiber reinforcement enhanced the reinforced expansive soil tensile strength capacity, wherein the geogrid reinforcement is the quick fix mechanical stabilization technique, which is also used to reduce the pavement and footing failures. In this research, it is attempted to stabilize expansive soil and poorly graded sand by using polypropylene fiber and geogrid reinforcement in a layered soil system. The parameters varied for the study are length of reinforcement, effective depth of reinforcement, and altering layers of soil system. The results are presented in terms of ultimate bearing capacity and load–settlement curves of model footing with additional inclusion of geogrid in sand layer and polypropylene in clay layer. It is observed that there is an improvement of 28.7% in load carrying capacity of layered soil with the inclusion of geogrid (0.3B) and polypropylene (1.5%) compared to unreinforced layered soil system.