[1] While predominantly a day school, SCEGGS offers a small number of boarding places at St Vincent's College, Potts Point.

Wilkinson made unsuccessful appeals for money from the church before she began an internal expansion of the school's facilities.

[9] SCEGGS continued to expand and several branch schools were opened – Bowral (1906–1929) relocated to Moss Vale (1930–1974), Hunters Hill (1912–1915), North Sydney (1911–1941) becoming Redlands (1945–1976), Wollongong (1955–1976) and Loquat Valley (1967–1976).

Moss Vale was forced to close in 1974, and two years later, Redlands, Wollongong and Loquat Valley became schools independent from SCEGGS Darlinghurst, and have been governed by their own boards ever since.

The house system was introduced in 1926 by Miss Wilkinson to help generate school spirit and sporting enthusiasm, encourage good conduct and to provide girls with opportunities for taking on responsibility.