Property relations are such a common feature of social life that we can sometimes forget the immense complexity of the web of laws, practices, and ideas that allow a property regime to function smoothly. But we are quickly reminded of this complexity when social conflict over property erupts. When social actors confront a property regime – for example by squatting – they enact what can be called ‘contested property claims’. These confrontations raise crucial issues of social justice and show the ways in which property conflicts often reflect wider social conflicts. Through a series of case studies from across the globe, this multidisciplinary anthology exploring contested property claims brings together works from anthropologists, legal scholars, and geographers, who show how disagreements give us a privileged window onto how property regimes function and illustrates the many ways that the institution of property shapes power relationships today.