Section 4-204. Demolition of buildings and structures

a. The commissioner of
  citywide   administrative   services  or  the  commissioner  of  housing
  preservation and development, when requested to do so by the mayor,  may
  cause  to  be demolished any buildings or structures located on any real
  property which the commissioner is authorized to manage and superintend.
    b. Whenever a borough superintendent of the  department  of  buildings
  requests, pursuant to the provisions of section 26-240 of the code, that
  the  commissioner  demolish any building or structure or part thereof as
  to which a precept has been issued pursuant to the provisions of section
  26-239 of the code, the commissioner shall cause same to  be  demolished
  in accordance with such request.
    c.  The  commissioner  may  effect  any  demolition  work mentioned in
  subdivision a or b of this section, through personnel of the city or  by
  letting  a  contract for such work, or where such board shall so direct,
  such  demolition  work  shall  be  done,  under  the  direction  of  the
  commissioner,  by  any other agency of the city designated by the board,
  through personnel of the city or through the letting of  a  contract  by
  such agency for the work.