The NPPF seeks to significantly boost the supply of housing. To encourage this, LAs that have fallen behind with past delivery are required to make up for this by bringing forward an extra 20% of housing supply. Others are required to add 5% more homes. A lack of five year land supply is often the trigger for an application being prepared and submitted, particularly where such a proposal would be contrary to the development plan.
LAs can be pressured by local interests to limit the planned development of housing. This is evident in the reduction in the planned housing provision in many areas from that contained within the Regional Strategies. However, there is strong evidence that Planning Inspectors are increasingly challenging LAs.
The overall five year land supply in the Southern Half of England is marginal. The average position is 5.7 years’ supply. Given the ‘minimum’ required by the NPPF is 5.25 years, and that the majority of the data is that prepared and published by the LAs themselves, this does not represent a healthy position, and it is one which often leaves LAs open to challenge.
The 20% buffer applies to 34% of LAs reviewed. This indicates a degree of past poor performance of housing delivery. Savills research suggests that many LAs do not apply this buffer when reporting their supply. Overall, 63 of the 190 LAs reviewed by Savills (33%) do not report a five year supply. 117 (62%) do not report a six year supply or more (all based on the most recent figures (see Map 2).