Renovations add a 'bedroom' and half-bath to this West 57th Street co-op, but does that double the price?

… BrickUnderground periodically examines homes on the market for significantly more than their most recent sales price and with the help of experts and the number … youll see One57 the 1004foot tall behemoth where two penthouses are in contract for over $90 million the former …

By Leigh Kamping-Carder |May 15, 2014 - 8:59AM