A sculptural white staircase, a sprawling rooftop terrace and High Line views are among assets at the penthouse topping Zaha Hadid Architects' 520 West 28th in New York.
Developer Related Companies released photos of the 637-square-metre property to coincide with its recent market listing.

The residence, which occupies the final three floors of the 11-storey luxury condo building, is currently listed for $50 million (£38 million) ? the most expensive of the 39 condos inside the block that Zaha Hadid Architects (ZHA) completed earlier this year.
Photos show floor-to-ceiling windows that offer expansive views of the surroundings along Chelsea's elevated High Line park.

A kitchen, an open-plan lounge and dining room, a library and five bedrooms are hosted across the first two levels, while the third is slightly smaller to make room for a huge rooftop patio. Finishes are simple throughout, including wooden floors and walls painted in muted hues.
A key feature is the sculptural, white staircase designed by late architect Zaha Hadid ? who led the project. The curvaceous lacquered banister twists up and around a light well, drawing on the curvy forms of the metal window frames on the exterior, as well as past projects by Hadid.

"Within the penthouse, this centrepiece is manifest as the sculptural staircase that extends all three floors, connecting its interior with the large outdoor terrace," said ZHA project director Johannes Schafelner in a project statement.

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