The old Battle Creek Post Office is a stone-and-brick structure measuring approximately 112 feet long and 75 feet deep. The 1930–1931 addition, although carefully matched in style, obscures the symmetry of the original design. Stone quoins run along the corners, and a stone balustrade and a denticulated stone cornice run across the top. Both the original structure and the matching addition have two stone arched windows measuring approximately 8 feet wide and 16 feet high, decorated with a cast-iron grillwork.
