Split-entry house plans, also known as split-level house plans, rose to popularity during the 1950s as a multi-story modification of the then dominant one-story ranch house plans. Split-level house plans retain the horizontal lines, low-pitched roofs and overhanging eaves of ranch house plans, but add a two-story unit divided at mid-height to a one-story wing to create three floor levels of interior space. Three levels make it possible to locate and accommodate three types of living spaces-quiet living spaces, noisy living and service spaces, and sleeping spaces-all on three separate levels.
