Section 335-A. Easements of necessity

The owner of any lot, plot, block,
  site or other parcel of real estate being a subdivision  or  part  of  a
  subdivision  of any larger parcel or parcels of real property shown upon
  a map of said parcel or parcels of real property and of its  subdivision
  or  subdivisions,  filed  in  the  office  of the county clerk or of the
  register of deeds of the county where the property is situated, prior to
  the sale or conveyance of such lot, plot, block, site or  other  parcel,
  or subdivision thereof by the seller thereof, upon which map any road or
  street  is  indicated  or  shown  as giving access to or egress from any
  public road or street to such lot, plot, block, site or other parcel  of
  real  estate  thereon  indicated or to any part thereof, sold or granted
  after such filing, and the owner of any lot, plot, block, site or  other
  parcel  of  real  estate, the conveyance whereof shall specifically give
  the right of access to or egress from the same by any  private  road  or
  street  over  lands  belonging to the maker of such conveyance and which
  road or street is described in such conveyance, may, when  necessary  to
  the  enjoyment  of  the lot, plot, block or site or other parcel of real
  estate so sold or conveyed and when the same is not bounded by a  public
  road,  lay,  beneath  the roads or streets indicated and shown upon such
  map or described in such conveyance as giving access to or  egress  from
  any public road to such property so sold or conveyed as aforesaid, wires
  and  conduits  for  the  purpose  of  supplying  the  said property with
  electric light and telephone service. Such wires or  conduits  shall  be
  laid  only  on  condition that the private roads or streets on which the
  owner has the right of access to or egress from such property  shall  be
  restored  as nearly as possible to their original condition and that the
  person or persons entitled to the fee of such private roads  or  streets
  or  having  an  easement  over  the same shall be compensated for actual
  damage occasioned by the laying of such wires or conduits.
    Nothing herein contained shall be deemed to affect in any manner lands
  acquired by the city of New York for  the  purpose  of  construction  or
  development of its water supply system.