If you and your family are in search of the perfect house plan, you might have come across the term “split bedroom floor plan,” especially with older designs. It was in the 1950s and 1960s when the split-level floor plan began to gain popularity in the suburbs of America. Although the design is basically derived from the ranch style, it was a fresh and modern take on home styles of the ‘50s. Aside from that, families moving into upscale neighborhoods were looking for grander homes.