$4.5M Modern Duplex Sits Atop 1890 Stanford White Mansion

This apartment has got to be a unicorn. The 3BR/3BA duplex with two outdoor terraces hit the market in August of 2013. It just re-listed, asking the same exact price: $4.5 million. It must be the only property in the city whose owners aren't trying to reap more profit given the giant jump in sales prices. In any case, a modern renovation left this penthouse pad, which boasts a giant, swoopy central staircase, looking very little like the 1890-built co-op on which it sits. The latter, which was once a private mansion, was designed by McKim, Mead & White—yes, architects of the old Penn Station, Columbia University, and the Brooklyn Museum. Revel in the incongruity, and enjoy the flora-filled outdoor spaces.

· Listing: 23 Park Avenue #4S [Stribling via StreetEasy]
· Own a Penthouse in a Stanford White Building for $4.5M [Curbed]