PPS 12 Housing in Settlements·Page 64
Meeting Social Housing Need Through Stock Turnover and New Construction
Social housing need is primarily met through re-letting existing accommodation; new construction is considered only when re-lets are insufficient to meet identified needs.
The principal means of meeting social housing need is through the re-letting of existing Social Housing accommodation (stock turnover). Where relets are insufficient to meet housing need then the construction of further social housing is considered.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 12 - Housing in Settlements.pdf