Previously located in downtown San Antonio, Saint Mary’s Hall began facing the problems of progress and expansion that come with a city on the rise. The Board of Trustees decided that the school should develop a new campus to meet their current needs and future demands. To raise the needed money, the school held its very first capital campaign with a goal of $2.38 million which was exceeded by parents, alumni, trustees, foundations, and other members of the Saint Mary's Hall family.
The 60-acre plot of land purchased ( at 9401 Starcrest Drive) included the Montessori School, which had been built adjacent to the land, and would later become the Saint Mary’s Hall Lower School. The associated firms of San Antonio architects O’Neil Ford and Bartlet Cocke, who had designed Trinity University, were asked to help design the new campus which was occupied for the first time in November 1968, with more than 300 students and faculty (including 119 boarding students). The new facilities offered modern buildings and grounds that allowed for future growth which ultimately allowed Saint Mary's Hall to become the great school it is today.