Symmes Valley High School was created with the consolidation of Waterloo High School, Windsor High School, and Mason-Aid High School. Classes began in 1961. The main portion of the building was constructed in 1961, and there have been several building modernization projects and additions. Six additional classrooms were added to the school in 1975. In 1994, a new elementary building was added on the same campus. Renovations were done, including the removal of asbestos, and the addition of a new heating and air conditioning system, new lights, new ceilings, and new windows. A new band room was constructed at the rear of the building, and the gym received new seating, a refurbishment of the floor, and new paint. In 2003, another multimillion-dollar project was completed. A new, state-of-the-art library and media center was constructed along with new offices, a new kitchen and cafeteria, and several new classrooms. The hallways received new flooring, new lighting and ceilings again, all new interior doors, and painting. The
home economics classroom was also completely remodeled. The gymnasium again received new seating in the summer of 2007, along with a sanding and repainting of the gymnasium floor. ==Athletics==