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]

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]