The evolution of syntactic and dimensional properties in Sydney social housing

Purpose This research aims to investigate how the social and spatial properties of Sydney’s social housing units have evolved over four socially defined eras (1890–1939, 1940–1969, 1970–1999 and 2000–present). It asks three questions as follows: (1) Which syntactic and dimensional shifts characterise each era? (2) How changing social contexts and delivery modes influence housing form? (3) What lessons can inform contemporary design practice? Design/methodology/approach This research analyses the syntactic and dimensional characteristics of 45 social housing units in Sydney, constructed between 1914 and 2020. A computational approach is employed, combining justified plan graph analysis with plan area properties derived from archival drawings. Findings The results show a correlation between the integration values of the “private” and “communal” sectors and their corresponding area ratios. Notably, the private sector’s integration during the “Golden Age” (1940–1969) and its connectivity and mean depth in the “Deceleration” era (1970–1999) differ significantly from other eras. Originality/value The study’s findings, including adaptive-JPGs, reveal how past layouts responded to social dynamics, offering lessons for contemporary design. The combined evolution of syntactic and dimensional properties in housing plan layouts over time has not previously been examined in such a comprehensive manner. Beyond contributing to digital design knowledge, these insights inform future planning strategies for developing adaptable and effective social housing solutions.