With the rapid increase in student enrollment, the school moved to a nearby location, Valukarama. Primary classes were held in a nearby building, Thurstan College. In 1974, during T. N. Silva's time as principal, the junior school at Thurstan College moved to its present location, Mahanama College. In 1975, 130 students sat for the national General Certificate of Education, and 107 students passed the exam. The government donated of land as the school expanded. By 1976, the site contained several two-story buildings.