 Trinity Grammar School in Prospect Road is a private school catering for students from PreK to Year 12 . The schools 's site has been in continuous use for education for 120 years . The headmaster 's house at Trinity was erected circa 1877 . The site operated as several different teaching institutions until it was purchased by the Anglican Church , becoming known as Trinity Grammar School in 1925 . Trinity Grammar is one of many wealthy schools in New South Wales , and has previously received some of the largest government subsidies , when comparing total government subsidies per school . An expansion plan by Trinity involving the demolition of houses in nearby Seaview Street caused controversy in 2007 . The development was nonetheless approved by the New South Wales Land and Environment Court . 
