Arthur Waterhouse’s tenure at Mount Lofty House marked a significant new chapter in the life of the grand hilltop residence, one defined by refinement, modernisation and long-term stewardship. When Waterhouse purchased the property in 1886, Mount Lofty House had already established itself as an architectural and social landmark through Arthur Hardy’s vision. Under Waterhouse, however, the house evolved from an extravagant private retreat into a more comfortable, enduring family residence, better suited to long-term occupation and changing times.
A respected businessman, Arthur Waterhouse was Chairman of the Bank of Adelaide and a director of the South Australian Gas Company. He acquired Mount Lofty House after the property had passed through a period of financial uncertainty following Hardy’s bankruptcy. Waterhouse used the house primarily as a summer residence, and his ownership spanned more than three decades, one of the longest continuous custodianships in the property’s history. During this time, he made substantial structural and functional improvements that shaped the house largely as it is recognised today
Among Waterhouse’s most significant contributions was the expansion and reconfiguration of the southern end of the house. He oversaw the construction of a new basement level containing three rooms and a staircase, increasing both capacity and practicality. Above this, a grand entrance porch was added, creating a more formal and impressive arrival point befitting the house’s status. This architectural intervention helped transition Mount Lofty House from its earlier, more informal configuration into a residence that better reflected late Victorian sensibilities and expectations of comfort and presentation.
Along the eastern side of the building, Waterhouse introduced one of the house’s most celebrated features: a long, elevated verandah with a jarrah floor that unified the structure and capitalised on its extraordinary outlook. This verandah provided a sheltered space for leisure and socialising while framing expansive views across the Piccadilly Valley. Complementing this addition was the installation of a large picture window overlooking the valley, a striking feature that remains a focal point of the house today and is now located in what is known as the Arthur Waterhouse Lounge. The window transformed the interior experience of the house, bringing the landscape directly into daily life and reinforcing the property’s connection to its setting.
Waterhouse also embraced emerging technologies, ensuring the house kept pace with modern living. By around 1920, Mount Lofty House had been wired for electricity, replacing earlier acetylene gas lighting, and a telephone was installed in the main hall, small but significant upgrades that reflected the increasing accessibility of modern conveniences in elite households of the period.
While Waterhouse was not known for the flamboyant entertaining that characterised Arthur Hardy’s era, his stewardship brought stability, comfort and elegance to Mount Lofty House. He preserved its grandeur while subtly reshaping it for family life, ensuring the house remained both functional and impressive. His careful enhancements allowed Mount Lofty House to transition successfully into the twentieth century, laying the groundwork for its survival through later changes of ownership.
Arthur Waterhouse’s legacy at Mount Lofty House endures in its layout, its outlook, and its sense of dignified restraint, a period when the house matured from an ambitious statement into a refined and enduring home.