Stangate House was first planned in
London from 1937 to 1939 by Rev. Samuel Raymond Baron Cornish, the original owner. In January 1940,
Adelaide architect
Eric McMichael accepted the model and plans made by Rev. Cornish and started construction on the house on 18 January 1940. Rev. Cornish and his wife Gwyneth developed the Stangate garden and rerouted the creek to run through it. In the 1960s or 1970s, Gwyneth bequeathed the property to the
National Trust of South Australia. The Camellia Society of Adelaide Hills maintains the garden. ==Heritage listing==