18.4 This theme is picked up in the draft South East Plan (2005). It states that national and regional guidance seeks to provide more sustainable patterns of development, based on higher densities and a sequential approach. It states that the efficient use of previously developed land and buildings within urban areas will be the first step in providing for the South East’s housing needs. The draft plan indicates that at least 60% of all new housing development in the South East should be on previously developed land. 18.5 Policy H2 of the draft South East Plan (2005) states that local authorities will prepare housing allocation strategies, phasing the development of large sites and the provision of infrastructure to ensure that overall housing allocations can be met. 18.6 A key factor in the delivery of additional housing is the provision of necessary infrastructure to support this. The draft South East Plan policy relating to infrastructure states that the scale and pace of land release for new development will be dependent on there being sufficient capacity in existing infrastructure to meet the area’s current needs and will be related to the provision of new transport and other infrastructure to meet the needs of new development. 18.7 The South East Plan also acknowledges that development in urban areas is not necessarily an easy option. It refers to potential obstacles such as high development costs and land assembly. It also states that infrastructure and other requirements associated with the cumulative impact of small-scale development in urban areas also need to be taken into account. 18.8 The Surrey Structure Plan (2004) states that the implementation of Surrey’s housing requirements will be monitored and assessed against the results of Surrey’s Housing Capacity Study, and district housing capacity studies. It states that the ‘Plan, Monitor, Manage’ approach will be implemented to ensure that best use is being made of previously developed land. Policy LO6 of the Structure Plan states that local planning authorities will adopt a plan, monitor, manage approach to housing provision, with appropriate phasing policies in local development frameworks. Policy Approach 18.9 Until the South East Plan housing allocations are confirmed, the requirement for Waverley is set out in the Structure Plan. The requirement is to make provision for 2,810 net new dwellings between 2001 and 2016. This equates to an average of 187.3 dwellings per annum. The Core Strategy will run to 2018. Pending the approval of the South East Plan and the new housing allocations, the Council will roll-forward the current Structure Plan annual requirement for the two years from 2016 to 2018. This gives a revised total requirement of 3,185 dwellings for the period 2001 to 2018. As at April 2005, some 867 net new dwellings had been built, at an average rate of 217 dwellings per annum. This leaves 2,318 dwellings to be provided between 2005 and 2018, an average of 178 dwellings per annum. Whilst the details of how this requirement will be met will be set out in the proposed Housing DPD, the Council is confident that the current housing requirement will be met through the use of previously developed land. Based on the supply over the last five years, small and medium windfall sites alone can be expected to continue to deliver an average of 136 dwellings per annum. It is expected that the housing requirements will be met through:- · the continued emergence of windfall sites;