When Chichester District Council adopted the "Chichester Local Plan Key Policies (2014-2029)" in July 2015 the Inspector required the District Council to complete a review within five years to make sure sufficient housing is planned along with other policies to protect the environment and secure appropriate infrastructure and employment to meet the needs of the area. This work will form the Chichester Local Plan Review 2034. Further information can be found about this process on the District Council's Local Plan Review 2034 page of its website
That Review is underway and it is anticipated that additional housing numbers for the Chichester District will be known sometime in 2018 including any for Southbourne. If so, whatever the number, the Neighbourhood Plan Steering Group will be supporting the Parish Council in determining where best to incorporate additional housing and new infrastructure, if any, within the parish.