[1][6] The hall has 32 rooms and also a large seven-room cellar, and its environs at the time also included a polo ground, a racecourse, a boating lake and a cricket pitch.

His son, John Andrew Tennant Mortlock, developed Martindale Station and built up an impressive collection of artwork which was displayed at the Hall.

[11] 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.

In May 2016 the National Trust of South Australia launched[14] a surprise bid to operate historic Martindale Hall under a plan it said should transform the 136-year-old estate into a major tourist destination and keep the building in public hands.