The size of the campus more than doubled in 1981 thanks to the $500,000 purchase of 14 acres of adjacent land. Each enrolled family was assessed $1,000 to finance the purchase. The athletic center built on the land was named in honor of Thomas Ridenhour, who served as president of the board of trustees for 13 years. The school expanded again in 1990, adding the McMahon Fine Arts Center, a 37,000 sf facility including a 500-seat theater, dining hall, and classrooms for both music and art. Also in 1990, Providence Day added an additional 6.8 acres of land to the campus for $1.2 million. The Dickson-Hemby Technology Center, housing computer labs, conference rooms, faculty offices and STEM classrooms was opened in 1998. In 2015 Providence Day launched a comprehensive fund raising campaign that financed a new 80,000 sf academic center, campus gateway builidng and additional parking, while also increasing the size of the school's endowment and annual fund.