Halloran attended
Sydney Boys High School and
Newington College. He qualified as a surveyor in 1890 and became a conveyancer and valuer. After establishing Henry F. Halloran & Co. in 1897, Halloran became a significant figure in property development and urban planning in New South Wales, from the 1880s until the 1950s. There were other Halloran subdivisions at
Stanwell Park, near
Orient Point, and at
Currarong. He also built structures at
Tanilba Bay in 1931. He attempted to create a development called Pacific City, near
Jervis Bay. The site of Pacific City was to have been west of
Hyams Beach and would have extended west to the
St Georges Basin shoreline. He also initiated a development he called
Port Stephens City, at present day
North Arm Cove, but, despite a significant area of land outside the present-day village being subdivided and sold, only a small village eventuated. Halloran began the revival of the ghost town of
South Huskisson, on the western shore of
Jervis Bay. He renamed the deserted "Old Township",
Vincentia, in 1952. He did not live to see it reborn as a holiday destination, following land sales for
holiday homes, also known as "weekenders", which occurred in the 1950s and 1960s. Halloran died on 22 October 1953, at the age of 84. ==Legacy==