Suburban reinvestment through ‘knockdown rebuild’ in Sydney

Cities are continually built and unbuilt (Hommels, 2005), reflecting cycles of investment and disinvestment across space, the machinations of housing and urban policy interventions, and shifting patterns of household need, demand, choice and constraint. The drivers of change are fluid and reflect shifting political, institutional, technological, environmental and socio-economic contexts. Urban landscapes evolve in concert with these changes, but the built environment tends to be defined more in terms of spatial fixity and the path-dependency of physical fabric. Suburban neighbourhoods register this dynamism in different ways as they have flourished, declined and subsequently revalorised over time. Changes initiated through redevelopment, from large-scale public renewal to alterations and renovations by individual owner-occupiers, are long-standing signifiers of reinvestment (Montgomery, 1992; Munro & Leather, 2000; Whitehand & Carr, 2001). Our concern here relates to a particular form of incremental suburban renewal: the increasing significance of private ‘knockdown rebuild’ (KDR) activity. KDR refers to the wholesale demolition and replacement of single homes on individual lots. We are interested in the scale and manifestations of this under-researched process and, in particular, the new insights offered to debates regarding gentrification, residential mobility and choice, and in turn, potential implications for metropolitan housing and planning policy. Our focus is Sydney, Australia.