Established in Randwick in 1984, International Grammar focuses its curriculum on languages, and to a lesser extent music,[4] and currently caters for approximately 1,200 students from early learning to Year 12.

[2] In 1994, leasing arrangements were negotiated with South Sydney Council in terms of which the school was to move progressively to a new site in Ultimo.

This arrangement with Council was for a new school to be constructed on the historical site of the Dalgety Woolstore in Kelly Street, Ultimo.

The creative arts, including music, design and drama, also play an important role in the school's curriculum.

Due to increasing demand for space, the roofs of the main campus are opened for playing; one as a basketball court; the other with primary school equipment.