: A "classic" split level places a straight two-flight staircase at the center, whose landings flow into the half floors. The height offset does not have to divide the floor height exactly in half, but uneven ratios other than 60/40 are unusual. The pinnacle of this concept is terrain differences in the range of 1.2 to 1.5 m, or one and a half or two and a half stories, but here it is almost exactly one.
What I mean here is that the staircase (of whatever shape) overcomes a whole floor, and within the level adjustments are made to align properly at the bottom at the entrance and at the top at the terrace.