This is the author's Post-print version (final draft post-refereeing as accepted for publication by the journal). The definitive, peer-reviewed and edited version of this article is published as: Kleinhans, R., Priemus, H. & G. Engbersen (2007). Understanding Social Capital in Recently Restructured Neighbourhoods. Two Case Studies in Rotterdam, The Netherlands. Urban Studies, vol. 44(5/6), pp. 1069-1091. DOI: http://dx.doi.org/10.1080/00420980701256047 Understanding Social Capital in Recently Restructured Urban Neighbourhoods. Two Case Studies in Rotterdam Reinout Kleinhans 1 , Hugo Priemus 2 and Godfried Engbersen 3 1 Reinout Kleinhans is in the OTB Research Institute for Housing, Urban and Mobility Studies, Delft University of Technology, PO Box 5030, 2600 GA Delft, The Netherlands. Email: r.j.kleinhans@tudelft.nl. 2 Faculty of Technology, Policy and Management, Delft University of Technology, PO Box 5015, 2600 GA Delft, The Netherlands. Email: h.priemus@tudelft.nl. 3 Faculty of Social Sciences, Erasmus University of Rotterdam, PO Box 1738, 3000 DR Rotterdam, The Netherlands. Email: engbersen@fsw.eur.nl. Abstract In the major Dutch cities, social rented housing in post-war neighbourhoods is demolished and largely replaced by more expensive owner-occupied and rental housing. Through residential mobility, these measures can trigger substantial population changes. In two recently restructured neighbourhoods in the city of Rotterdam, we study residents’ social capital. Herewith, we distinguish between the stayers, movers and newcomers. In a neighbourhood context, social capital refers to the benefit of cursory interactions, shared norms, trust and collective action of residents. Survey data show that social capital is not only an asset of long-term stayers, but that in particular newcomers are relatively rich in social capital. Factors associated with higher levels of social capital are a higher net income, presence of households with children, stronger place attachment, higher perceived neighbourhood quality, homeownership and single-family dwellings. The expected future length of residence in the area appears of little importance for social capital. Key words: Urban regeneration, neighbourhood restructuring, social capital, residential mobility, collective action, trust, social networks, social interaction.