The Camperdown Post Office was constructed in 1863 as the Post Office and Telegraph Station.The original single storey Victorian Italianate building was constructed from locally quarried basalt, to plans prepared by Public Works Department architects.
Various alterations and additions were made to the building in the late nineteenth century, including the construction of a writing and telegraph despatch room, and a new entrance, counter and archway. Continuing dissatisfaction with the facilities, however, culminated in major alterations and a two storey addition in 1909, in the Arts and Crafts style. Rock faced and fine axed basalt were used in the alterations, with the slate roof accented by half gables and wide bellcast eaves.