Expansion continued to be a priority for the Prep as the 21st century arrived. In 1993, the school purchased a tract of land on nearby Prospect Avenue, overlooking the New York City skyline. Seton Hall Prep broke ground for construction of the Edward D. and Helen M. Kelly Athletic Complex (KAC) on this site in 1999. The project would span several years; the final phase of construction would not begin until 2014. In 2013, the John J. Murphy '52 Science Center was opened, adding a new wing of classrooms and science labs to the school.