As the Federal Government's presence in Dallas grew over 310,000 square feet (29,000 m2) were leased in surrounding buildings to house larger agencies.

The U.S. District and Circuit Courts moved to the new Earle Cabell Federal Building and Courthouse in 1971, following the departure of the Post Office regional headquarters in the same year.

The substantial building spans the length of Bryan Street and was constructed in a Renaissance Revival style popular with the U.S. Treasury Department.

On upper floors, seemingly out of place, are colored terra cotta spandrels picturing the history of mail transportation.

The inside of the building contains an understated but impressive lobby with rows of window stations flanked by regional murals above the two entrance doorways.