The Collaborative International Dictionary of English v.0.48:

Frontage \Front"age\, n.
   The front part of an edifice or lot; extent of front.
   [1913 Webster]

WordNet (r) 3.0 (2006):

frontage
    n 1: the extent of land abutting on a street or water
    2: the direction in which something (such as a building) faces
    3: the face or front of a building [syn: facade, frontage,
       frontal]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "frontage":
   anteriority, aspect, attitude, azimuth, bearing, bearings,
   bold front, brave face, brave front, celestial navigation,
   dead reckoning, display, exposure, facade, face, facet, facia, fix,
   fore, forefront, foreground, forehand, foreland, forepart,
   forequarter, foreside, foreword, front, front elevation, front man,
   front matter, front page, front view, frontal, frontier,
   frontispiece, head, heading, lap, lay, lie, line of position,
   obverse, orientation, pilotage, position, position line, preface,
   prefix, priority, proscenium, radio bearing, set,
   window dressing