Jefferson Health has already made a great impact on the Market East neighborhood in Center City, yet the campus keeps expanding. In December 2017, the hospital has announced a major lease at 1101 Market Street, long known as the Aramark Tower. The expansion continues as Jefferson is planning a 400-foot Jefferson Health Care Specialty Care Pavilion at 1101 Chestnut Street with 750,000 square feet of medical office space, as well as a 329-foot-tall proposal next door at 1153 Chestnut Street, slated to contain 250,000 square feet of residential space. The two towers, collectively known as East Market Phase 3, will replace a block-spanning, mid-rise commercial and garage structure, which has been recently demolished. BLT Architects and Ennead Architects are listed as project designers.