The building had topped out by mid-1987.[1][86] The building, as constructed, exceeded its approved height by either 11 feet (3.4 m)[3][72][87] or 14 feet (4.3 m).[88] The difference of 3 feet (0.91 m) was a calculation error from two different methods of measuring height,[7] but the extra 11 feet came from Eichner's decision to add 2 inches (51 mm) of cement to all the floor slabs to stiffen them.[45][89][90] The topped-out structure had to undergo a second public review from the Board of Estimate, Manhattan Community Board 5, and the CPC.[71][87] Eichner voluntarily agreed to halt CitySpire's structural work,[91] though he saw the height overruns as being "of no consequence to anyone".[11] By November 1987, Eichner and city officials were discussing a compromise in which Eichner would give more arts funding but keep the extra height.[92] By the end of 1987, Eichner had sold 164 of the apartments,[93] and some of the commercial space was already occupied.[90] Residential prices at CitySpire had remained relatively low in the wake of Black Monday two months earlier.[94]