backsplit

noun

1. A split-level home whose split level is visible only from the side elevation.

   “By the 1960s in North America sprawling ranchers and backsplits with attached garages had become common […]”

   “As for the tornado-struck house, a semi-detached backsplit, it was in need of significant repairs, and the Cammisas said their insurance company told them not to expect a speedy visit from the adjuster.”