Oh, so THAT'S how some of the builds I've seen did it. But those two rooms will still have a ceiling the same height though, won't they?
Came in here to ask how I could re-create my grandmother's house from when I was a kid, and this was the closest match to what I wanted to do. Grandma lived in a house where the whole floor plan was split level. Facing the front of the house from the street, on the right was the garage and a room behind it at ground level, and the bedrooms were on top of that. On the left was a basement, but only about half a story down; on top of that was the living room, dining room, and kitchen; and on top of that was an attic bedroom.
So: from the garage, you went 1/2 story down to the basement, or 1/2 story up to the shared spaces. 1/2 story up from the shared spaces was the bedrooms, above the garage. 1/2 story up from the bedrooms, was the attic bedroom.
Can this be done in Sims 4? I've managed to make two separate stacks of stories, with one stack raised half the height of a story, but it won't allow me to put them directly against each other.