“…In order to do so, we locate new subsidised housing units in the urban expansion areas defined in the current Metropolitan Regulatory Plan, approved in 2013. Second, the pericentral scenario explores a re-urbanisation policy that has been widely discussed in Santiago, which proposes to densify areas that were originally urbanised for social housing in the 1960s ( Tapia, 2019 ; Castillo and Gray, 2019 ). These areas are called ‘operación sitio’ [operation plot] or ‘9x18’ because of the dimensions in meters of the original lots.…”