and pedestrian traffic through the estate was to be separated from vehicular. Each house was individually designed, some through a design competition organised by the Institute of Architects. The landscaping of the estate was designed by renowned landscape architect John Oldham. Originally, Crestwood was intended to be built to about five times the size that was eventually constructed. It was to be built around a large pool complex with administration buildings and a recreational area. However, the collapse of land values in the early 1970s led to slow takeup of the allotments and significant losses for Sloan. Opposition from the City of Gosnells, on the grounds that they would not fund the maintenance of any future subdivisions built along the same lines, led to Sloan abandoning the design concept and the subdivision never progressed as envisioned. The remaining land was used in the 1980s and 1990s for two more conventional subdivisions, Forest Lakes and Castle Glen Estates. The significance of the subdivision was recognised at the time. In 1973 the developer won the Award of Merit from the Urban Development Institute of Australia. In 1975 the Federal Minister for Urban Planning visited the site, and later went on to use the concept for three projects in Canberra. Other delegates visited throughout the 1970s, including academics from the University of Sydney and America. Gallery References External links City of Gosnells official website Australian Bureau of Statistics Thornlie (SA2) Suburbs of Perth, Western Australia Suburbs in the City of Gosnells