three-story, three-storied, three-storey, three-storeyed

from The Collaborative International Dictionary of English v.0.48

low-rise \low-rise\ adj.
   Lower than the highest heights; -- used of buildings of one
   or only a few stories; as, a low-rise apartment building.
   [Narrower terms: {three-story, three-storied, three-storey,
   three-storeyed}] {high-rise}
   [WordNet 1.5]