 One of the last large land purchases was that of Ross Thiem in the 1940s . A club member , C.W. Lloyd , sold 200 acres ( 0 @.@ 81 km2 ) around the golf course , which was again used as pasture by Thiem , who ran sheep on the property – and was the last to do so . The then Highways Department also acquired land in 1951 , buying 200 acres ( 0 @.@ 81 km2 ) of land above Beaumont for future transport planning . Thiem 's land was eventually sold in the 1950s , to the Rossdale Property Co . Their subsequent attempts at selling the land were just as fruitless as those before , and once again the property changed hands to the Mount Osmond Heights Pty Ltd . The land was newly subdivided , and it was in the late 1960s that finally much of Mount Osmond was sold to residential buyers . Fifty @-@ two out of the 116 new sites had been sold by 12 October 1968 at an average of $ 3 @,@ 500 , according to the Adelaide daily The Advertiser . Since the land sales of that era , Mount Osmond has developed slowly because of the scarcity of land and the housing and development restrictions of the Hills Face Zone . Now the suburb is home to large , extravagant , tree @-@ filled houses and properties . With the upgrade of Mount Barker Road to become part of the South Eastern Freeway from 1997 , Mount Osmond received its own freeway interchange as part of the development . 
