Designed by AD100 architect Tony Ingrao, 87 Mercer Penthouse B is a masterfully designed turn-key residence, discreetly perched on top of one of the best cobblestone blocks in all of Soho.

Six years in the making, 87 Mercer PH is a one-of-one, engineering marvel - a townhouse in the sky- occupying the top four floors of a 50-foot-wide cast iron loft building. This palatial multi-level r...