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]
From WordNet (r) 3.0 (2006) :
low-rise
adj 1: used of buildings of one or only a few stories and
usually no elevator; low; "looking out over the roofs of
low-rise apartment buildings" [ant: high-rise]