Looks like the Department of Buildings Stalled Site Team filed an Emergency Declaration after an inspection on 12-3-2009 uncovered the unbraced cinder block walls. In the first photo, you can see the diagonally placed wood boards that were used to support the masonry walls for the better part of a year.
H.P.D. does not usually perform work on privately owned property unless the lord of the land has failed to make ordered repairs to their buildings and they have been declared imminently hazardous to the public. Of coarse H.P.D., through the N.Y.C. Department of Finance, will bill the owner for the cost of the work. If the owner fails to pay the bill within 60 days, a lien is placed on the property.