In 1876 a substantial school hall was erected on the existing site and by 1898, Christ Church Grammar School was established as a choir school for boys, with the Reverend Charles Perry in charge.

In 1906 Christ Church Grammar was registered under the Education Act of that year - registered number 330. The school was strictly a choir school until 1920 when the first girl was enrolled - seven year old Clarice Lindsay from St Kilda. Christ Church became coeducational approximately fifty years prior to recent trends. Since then parents have sought admission for their daughters and sons, recognising the importance of a premium quality, independent education.