The original, main building was built three stories high of Ohio gray brick and elaborate trimmings of Indiana limestone with a Tudor-Gothic design.

On New Year’s Day, 1925, Reitz Memorial High School, with its 18 classrooms, auditorium that was used as a gymnasium as well as a cafeteria, library, candy store, parlor, and a large recreation room, it was dedicated by Bishop Chartrand of Indianapolis.

The new wing extending along Bennighof Avenue came with expanded first and second floors, a new gym, band room, and library.

In 1998, a new addition, costing roughly $5 million was added to the western part of the building.

The following IHSAA sanctioned sports are offered:[4] RMHS also competes in the National Archery in the Schools Program, placing 4th, 2nd, 2nd, and 2nd in the 2016-2019 Indiana NASP State Tournaments, as well as placing 1st in the 2018 Centershot Ministries World Tournament.