Designed by Kohn Pedersen Fox Associates, this building is one of 27 projects honored by the American Institute of Architects in its AIA Institute Honor Awards for 2011.

One Jackson Square occupies a six-sided site that had served as a surface parking lot since subway construction in the 1920s. Located at the convergence of two street grids and spanning two zoning districts, the 30-unit, high-end residential building steps up from seven to 11 stories, south to north.

To allow the curtain wall to follow a unique rippling path at each floor, a split horizontal joint was used at each spandrel location. Varied-width glazed panels form facets in the enclosure, approximating each floor slab's irregular curves. The result is a complex facade that engages in an animated dialogue with its urban surroundings.

The serpentine street wall of glass is continuous with the lobby's similarly sculptural walls of bamboo plywood. The rest of the ground floor is slated for retail. Above, the building contains a mix of apartments: one-, two-, and three-bedroom units in the lower floors, two-story duplex and terrace units above, and, in the tower, the most-spacious units.   >>>