When it was founded in 1971, Marbury was conceived as an incorporated non-profit association with a Board of Governors, who declared at the outset that it was a "co-educational, non-sectarian, independent, non-competitive, non-authoritarian school".

[citation needed] Another student of Marbury School was the musician Sia.

A portion of the property has since been purchased by The Hills Montessori School, as the location of its secondary (or "Wairoa") campus.

The original mansion and historic gardens have continued in private ownership.

[3][4] The school's main building (Wairoa) was used as the home of Col. and Mrs. Fitzhubert in the Australian film Picnic at Hanging Rock.