Selected by the United States General Services Administration, Perkins Eastman programmed, planned and designed a broad range of improvements to the Thurgood Marshall U.S. Courthouse including infrastructure replacement, courtroom and judicial chamber expansion, historic restoration and interiors for multiple agencies. The team’s completed work fulfilled the requirements of the Appellate Court, the District Court, the U.S. Attorney’s Office, the U.S. Marshal’s Service and the General Services Administration. Prominent elements include an en banc courtroom seating five justices for the Appellate Court, chambers for the Appellate Court, restoration of historic District Court courtrooms and rebuilding of the monumental granite steps leading to the courthouse entrance. Infrastructure improvements comprised seismic upgrades to the building structure and replacement of the courthouse electrical, heating, ventilating and cooling systems. The complex project’s design incorporated multiple construction phasing strategies to limit disruption of courthouse operations during construction.