Abstract: A prefabricated foundation is provided using a plurality of concrete panels that are cast at a factory location to a predetermined uniform form and size. These panels are of a generally rectangular shape and are positioned end to end forming a wall-like structure around the entire perimeter of a prefabricated structure. The lower surface of the panels are then supported by a plurality of precast posts that correspond in position and number to the joints between the plurality of panels. The joint between two abutting precast panels is sealed to provide a weather tight fit between the exterior and interior of the panels. The upper edge of the precast panels are locked in position keeping them from moving in either an inward or outward manner thereby providing a stable platform upon which a prefabricated structure can be placed.