The school was first established in 1927 as Neutral Bay Girls Intermediate High School, but traced its history back to the establishment of the Neutral Bay Public School in 1886. However, within a few years, the buildings on the site on Murdoch Street, Cremorne, were considered to be inadequate. The foundation stone of the new main building was laid by Minister for EducationDavid Drummond on 6 October 1934 in the presence of the Mayor of North Sydney, Ald. Hodgson, who noted that the "new building had been long needed, as the conditions for staff and scholars at the old school were deplorable." A year later the buildings, which contained seven classrooms, an assembly hall, science room, preparation room, and staff rooms erected at a cost of £8079, were completed and were opened by the local Member for Neutral Bay, Reginald Weaver, on 6 July 1935. In January 1941 the school was upgraded in status and became known as Neutral Bay Girls Junior High School, which continued until April 1952 when the school was renamed as Cremorne Girls High School.
Closure
Enrolments had been declining at the school since 1947 and by 1985 enrolments stood at 380. As a consequence, the Minister for Education Rodney Cavalier, made an announcement on 1 July 1985 that the school was economically and educationally unviable and would be closed by 1987, with no year 7 intake for 1986 and the remaining students transferred to Mosman High School or Willoughby Girls High School. As a result, a concerted campaign was started by the students and staff of the school with the local community to save the school: over 300 girls marches across the Harbour Bridge on 21 August in protest, a small delegation later met with the minister and a community organisation was formed, known as the 'Save Cremorne Action Committee'. These efforts were ultimately unsuccessful and during the lead up to the closure in mid-1987, the final Principal of the school, Ruth Readford, noted that "There are too few students in this part of the metropolis. Or, to put it another way, there are too many schools, both State and Private." Despite various calls to keep the school site in public hands, by 1989 the Minister for Administrative Services, Robert Webster, put the site up for sale by public tender. The site was subsequently purchased by SCEGGS Redlands to be transformed into their new senior campus. On 2 August 2013, the 1934 Inter-war Neo-Georgian style main building of the former Cremorne Girls High School was given heritage listing in the North Sydney Local Environment Plan.
