Casa Grande is a heritage-listed villa at Nettle Street, Mount Isa, City of Mount Isa, Queensland, Australia. It was designed by Donoghue, Cusick & Edwards and built in 1949. It was added to the Queensland Heritage Register on 28 May 1999.HistoryWork commenced on Casa Grande as a home for the then General Manager of Mount Isa Mines, Julius Kruttschnitt II, in 1949. It was a "grand house", designed by the prominent Brisbane firm of Donoghue, Cusick and Edwards, but reflecting the influence of Kruschnitt's time spent in both Arizona and Mexico.Kruttschnitt, with a background of developing mines in America for ASARCO's mining department, had taken on the challenge in 1930, of revitalising the ailing Mount Isa Mine at a time when the company was unable to meet outstanding financial commitments. The 1930s, a time of depression and austerity throughout Australia, was reflected in the price of lead plunging to the lowest point in the history of the metal markets.Kruttschnitt tackled Mount Isa's problems with relentless energy and after more capital was raised through overseas financiers, ore production commenced again in 1931. In earlier years of the mine's operation, the company expended large amounts of money providing housing for employees. Two-storeyed timber houses, a number of dormitories and community buildings were constructed for workers during these more buoyant years. The 1930s saw more austere housing accommodation for workers often in the form of tin huts and tent houses. The problem of a lack of financial resources for accommodation extended to Kruttschnitt's own residence. Initially, he was housed in a modest staff house overlooking Central Park and the Band Rotunda. Kruttschnitt was reported to be unimpressed with his quarters.