While better known for its manufacturing buildings converted to retreats of discreet loft living, Tribeca is ushering in a mini-Gilded Age of mega-modern townhouses that are rising from the neighborhood’s modicum of narrow lots. Yesterday, the Landmarks Preservation Commission approved Maya Lin Studio‘s design of a five-story, 20,000-square-foot single-family mansion at 11 Hubert Street that will use the structural bones of an existing three-floor commercial building and add more than 6,000 square feet of floor area throughout. The nondescript commercial structure is a vestige of a never-finished 1980’s residential project that Lin, in collaboration with architects Bialosky + Partners, hope to rectify.

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