Green Valley is located 39 kilometers west of the Sydney central business district in the local government area of the City of Liverpool. It is part of the Greater Western Sydney region. The area now known as Green Valley was once home to the Cabrogal people who spoke the language of the Darug people. In 1810 Governor Lachlan Macquarie established a town at nearby Liverpool; the surrounding areas were soon given to settlers who cleared the land for farming.
Peter Miller was one of the first settlers in the area he gave his name to the nearby suburb of Miller. The Green Valley School was opened in 1882. It wasn’t till the 1960′s when Sydney’s urban sprawl had reached Liverpool that building began on the Green Valley Housing Estate. It was only then that the area began to switch from farming country to a residential development.