The Coach House was built in the early 1880s and originally incorporated an open courtyard, stables and a hayloft.
The names of some of the horses are still affixed to the northern side of the building.
Just outside the Coach House is the original Garage, built for Peter Waite's vehicle - the second registered automobile in South Australia.
The first laboratory of the Waite Agricultural Research Institute was established in the Coach House when the estate passed to the University of Adelaide. Groundbreaking work in investigation of deficiencies in trace elements in South Australian soils was conducted here in the 1920s and 1930s.