Abstract: An interlocking building system that includes a floor deck, a plurality of corner wall studs having a first longitudinal edge that comprises a first dado, a plurality of top studs having a longitudinal edge that comprises a dado, and at least one wall panel that has at least three edges, wherein the first dado of the first longitudinal edge of one of the plurality of corner wall studs is configured to receive and hold a first edge of at least one wall panel, the dado of the longitudinal edge of the plurality of top studs is configured to receive and hold a second edge of the at least one wall panel, and the first dado of the first longitudinal edge of the another one of the plurality of corner wall studs is configured to hold a third edge of the one of the at least one wall panel.