Urban consolidation is a major policy plank in the management of Australian metropolitan development. At its heart are a set of actions designed to reduce the land used by housing in the urban development process. These actions are focused on the development of the fringe as well as the re-development and use of land within the currently built fabric of inner and middle suburbs. On the fringe, implementation involves regulations on the size of lots, targets for housing density and since 2004 has included an urban growth boundary that constrains development within a specified area. In established areas implementation involves rights to build multiple dwellings on land previously occupied by a single house through to policy action that facilitates higher than previous density of housing in selected new projects.