abutter

from WordNet (r) 3.0 (2006)

abutter
    n 1: the owner of contiguous property

from The Collaborative International Dictionary of English v.0.48

Abutter \A*but"ter\, n.
   One who, or that which, abuts. Specifically, the owner of a
   contiguous estate; as, the abutters on a street or a river.
   [1913 Webster]