 He was the most favoured architect of the Church of England in New South Wales for much of his career, and between late 1849 and 1854 was the official "Colonial Architect to New South Wales".While Blacket is famous for his churches, and is sometimes referred to as "The Wren of Sydney", he also built houses, ranging from small cottages to multi-storey terraces and large mansions; government buildings; bridges; and business premises of all sorts.Blacket's architectural practice was highly influential in the development of Australian architecture.