This exemplar project has in many ways set the standard for simultaneously unlocking a site’s potential and providing restorative environmental and community development outcomes.

CDP was the lead consultant for this residential estate. The former sand quarry was transformed into a successful residential community with an expanding local economy of retail, commercial and community related activities for 4,000 residents. Calleya has proven urban infill can be achieved through innovation, addressing significant environmental challenges that could have prevented intensive development of the site.

CDP professionals oversaw reclassification of land situated over a Public Drinking Water Source Protection Area by demonstrating urban development can not only manage environmental impacts but can actively improve environmental conditions. This enabled rezoning of the land from Rural to Urban.

An innovative stormwater management system achieved significant development cost savings by removing the need to import fill to achieve clearance from groundwater. The urban design responds to the modified landscape and successfully manages the interface with an industrial estate, significant Main Roads WA and Western Power infrastructure, sensitive remnant bushland and the nearby Jandakot airport. The Estate, nearing completion, offers excellent pedestrian and cycle links both within the Estate and externally to the nearby Cockburn Central train station and Activity Centre.

Project Features

  • Diverse housing typologies
  • Water sensitive urban design
  • School site
  • District parkland
  • Aboriginal heritage

CDP Services

  • Project feasibility
  • Negotiating statutory approvals
  • MRS and local planning scheme rezoning
  • Local structure planning
  • Urban design and detailed subdivision
  • Neighbourhood centre design
  • Development contribution documentation
    Local development plans




Treeby, Western Australia, 25km south of Perth CDB


2,000 lots




Anticipated late 2021