Yesterday, Hellmuth Obata & Kassabaum (HOK) filed permit applications with the city’s Department of Buildings to construct their first residential tower in the city–an 18-story, mixed-use condominium tower at 147 East 86th Street on the Upper East Side. The 210,000-square-foot project will anchor the northeast corner of Lexington Avenue and 86th Street and will sit directly atop the Lexington line’s 86th Street subway station, for which the developers will build a new entrance. The $340 million project is being shepherded by a joint venture among Stillman Development, Ceruzzi Properties, and Kuafu Properties, who will build retail on the first few floors of the building and high-end condo units up top. Much of the site is owned by the the estate of real estate mogul Sol Goldman. Filed plans show that the development will contain 63 units and rise 210 feet, the maximum height allowed in the zoning district.