The restoration of the central atrium and historic courtrooms of the 1892 building and the original Post Office retail hall in the 1933 wing included cleaning original wood and marble and replicating original paint colors and stencil patterns. A new skylight and laylight in the atrium replace the originals, which had been destroyed. New courtrooms and new office space for the U.S. Attorney General are integrated into the 1933 extension. Reconstructed sidewalks and new monumental steps connect three accessible building entrances to the street and Cadman Plaza Park.

This project was completed by Kliment Halsband Architects prior to becoming a Perkins Eastman Studio.