The split-level house is instantly dated to its time period of origin: the post-war American suburban housing boom in the late 1940s to early 1960s. Myriad factors, from governmental policies to consumer expectations, shaped the size, form, and style of houses built during this unique time in American history and directly resulted in the immense popularity of the split-level house design. This brief analyzes the history of split-level house design and popularity, explores its unique architectural features, and makes a case for its resurgence today as an affordable and livable housing option. Key concepts discussed in this brief include the split-level house, post-war architecture, American residential architecture, suburban design, post-war innovation, the impact of cultural shifts on the built environment, post-war housing shortage, post-war design, American vernacular design, and affordable housing.