The public square remained an open space in the Spanish tradition with the town well covered by a gazebo at its center from 1779 until this post office was built. The one-story, red brick Georgian Revival design was simpler than other post offices of the period, lacking a portico, loggia, or pediment. Three central arched openings have ornate shell-and-fan tympana and windows or doors.

The brick streets found throughout downtown were installed starting in 1918, replacing earlier bois d’arc (wood block) paving.