an agreement of the lease) was to continue with and finalise the construction of Oran Park house. In 1842, the lease was transferred to Henry William Johnson who took out two mortgages on the property. It is assumed that the first was to purchase of land and the buildings and the second was to finalise the construction of Oran Park house (). Johnson lived at Oran Park until 1867 when he defaulted on his mortgages and was foreclosed on by Thomas Barker who took possession of the property. It is alleged that, following this, the shamed Johnson leapt to his death from the roof of Oran Park house. By 1871, when Oran Park was sold to Edward Lomas Moore, the house was in poor condition. A wealthy grazier and one of the largest landowners in the Campbelltown district, Moore lived at Oran Park with his wife Anne and large family (of some 12 or so children) until the construction of the nearby Badgally house was complete. When the family moved in 1882, Moore leased the imposing two-storey Oran Park house (with wrap-around verandahs, rear basement, octagonal tower and established gardens) to Thomas Cadell who operated the property as a dairy farm. Upon Moore's death in 1887, and after years of the contention of his will, the ownership of the Oran Park property finally passed to his younger son Essington Moore in 1907 who initially leased the property before returning from England in the 1930s to make Oran Park his permanent home. Oran Park house underwent some changes during the Moore period (the roof was reconfigured and the lantern removed) but, upon his sudden death in 1937, the property was sold to Hubert Harry Robbins who had grand intentions to develop Oran Park as his family's country retreat. Much of the significant modifications to Oran Park house are attributed to Robbins who converted the Victorian Italianate house into a Georgian Revival style. After Robbins death in 1945, Oran Park was sold to Daniel James Cleary (who established the Oran Park Raceway, west of the property), sold again to Sydney merchants Arthur Raymond Booth and Robert Leslie Booth later in 1946 and then again to Camden farmer John Thomas Vivian Frost in 1947. Frost continued the farming use of the property until 1960 when it was then sold to Cobbitty Investments Pty Ltd for subdivision into hobby farms. Sold again in 1961,