Designed in 1958 by the late architect Esmond Dorney, the original housing is one of the most famous icons of modernist architecture in Tasmania. The housing is perched on top of an abandoned 1900s fort on Hobart Porter Hill, with a sunken lounge and spectacular views over the Derwent Estuary. Furthermore, the housing use arching form responds equally to its site and panoramic views. And, the walls are glass, lightly framed in tubular steel with integral diagonal bracing in the plane with the glazing. The aim is to allow views of mountains, sky and river in the Interior living room. In 1999, Morris-Nunn and associates designed an extension part to the house. Their design concept back to be far closer to the original intent of Esmond Dorney. Circa Morris-Nunn designed a separate but linked pavilion as a retreat for the parents, allowing the house to be used by a growing family. Furthermore, the architectural form of the new extension uses contemporary materials to show development over. In 2001, The Heritage Award for Australian Institute of Architects (TAS) was awarded to Circa Morris-Nunn for Dorney Revisited.