A decade after its construction, debt and drought forced the Bowmans to sell all their holdings. Dying childless, his wife became the heir to the Mortlock fortune, and she bequeathed Martindale Hall and the estate to the
University of Adelaide in 1979 upon her death. On 21 March 1978, it was listed on the now-defunct
Register of the National Estate On 24 July 1980, it was listed as a state heritage place on the
South Australian Heritage Register. Martindale Hall along with of grounds were later handed to the
South Australian Government by the university in 1986. On 5 December 1991, the land on which the building is located was proclaimed as the Martindale Hall Conservation Park under the
National Parks and Wildlife Act 1972 for "the purpose of conserving the historic features of the land". From 1991 to late 2014, the property was managed under lease as a tourism enterprise, offering heritage accommodation, weddings and other functions, and access to the grounds and Hall to day visitors. The property is currently managed by the
Department for Environment and Water, which in August 2015 received an unsolicited bid for the purchase or long-term lease of Martindale Hall. by the
National Trust of South Australia. ==Fight to Save==