The Department does not collect centrally the number of houses planned for construction on flood plains, which depends on a large number of local decisions. It is a matter that regions and local planning authorities should consider in preparing regional spatial strategies and local development documents, and in taking decisions on individual planning applications.
Government's aim is to avoid inappropriate development in areas of high flood risk. The new Planning Policy Statement No. 25 directs development away from these areas through a sequential, risk-based approach. More vulnerable development, such as housing, should not be permitted in those areas unless it can be clearly demonstrated that the development will be safe, without increasing flood risk elsewhere and provides wider sustainability benefits that outweigh the flood risk.