In most cities around the world, planning controls or regulations of some form have been implemented to attempt to ensure that development is achieved at socially desirable levels. However, when such restrictions are put in place, it is important that the impacts of these policies are entirely understood. Such restrictions raise a risk of unintended consequences and potentially misdirected incentives may be provided to developers. This may impede the ability of the policy to achieve the socially desired planning outcomes and deprive the community of efficiently priced goods and services and other benefits associated with increased competition