For really large loft renovations, size can be its own problem. This apartment’s huge footprint (5000 square feet) left its dark center awfully far from the perimeter windows. We fixed this by pushing the habitable rooms to the windows and conversely packing the middle with storage. Then we ran a ring of circulation between the two zones. Instead of side walls, the family room walls has giant etched-glass panels that pocket away so as to clear a path for the kids’ zip line. For the adults, there’s an acoustically isolated music room, a climate-controlled wine room, and minimalist detailing.