Suburbs in Melbourne present to us a unique context with which a new approach towards urban form can be devised using the existing conditions and opportunities found with infrastructural developments. This thesis contains the investigations on the various 'pathologies' of the urban fabric specifically on the potential use of 'Spaces Left-Over After Planning' as by-product to infrastructural development in relation to the reinvigoration of Melbourne suburbs under the influence of current and future metropolitan growth pressures. The contents of the research aims to demonstrate the potentials for urban diversification followed by densification using the already inherent characteristics of the selected suburbs (Oakleigh, Waverley and Broadmeadows) to facilitate the metropolitan expansion of Melbourne with the intention of encouraging ways in which suburban fabric can reach its maturity along with new infrastructural developments to foster community engagement.