A reimagined cast iron building in the heart of  New York City’s Tribeca  has already become one of Manhattan’s most sought-after residences, with buyers snapping up almost every unit inside the property before construction had even been completed. 32 Walker Street is a seven-story, five-unit property that blends historic architecture with modern luxury, courtesy of an extensive overhaul that, when completed, will see a once-crumbling street corner transformed into a hot spot of design