Holy Trinity Catholic School began operation in August 1994 in five modular classroom buildings on the property of St. Michael’s parish. The school began with a morning prekindergarten program for 4 year olds, three sections of kindergarten and one first grade class. Before and after school care (the Extended Day Program) was also offered to school families. A total of 87 students were enrolled with a faculty of nine. The school’s plan called for adding one grade level each year until the grade range included prekindergarten through eighth grade. Holy Trinity’s first graduation ceremony took place on May 24, 2002.
Soon after opening, the school council and the pastors began looking for a permanent site for the school. Thirty-one parcels of land were considered before the 7.23 acres on the west side of S.H. 121, just north of Hall-Johnson Road was purchased.
The school moved into the first 16 classrooms, multipurpose room and offices on October 11, 1997. A second wing, including classrooms and a library, was completed in June 1998. Construction on the third phase was completed in December 1999. This phase included middle school classrooms, a science lab, an art room, and a gym.