It is often assumed that violence diminishes after civil war. In fact, urban areas can turn highly violent. The new forms of violence that can emerge are widespread but poorly understood and have been attributed to a range of factors including rapid urbanization, lack of economic development, continuing ethnic tensions and poverty. This paper examines urban violence in Juba, the “new” capital of Southern Sudan, through the lens of informal urban land access. The city experienced rapid population growth and an increase in land-associated violence after open hostilities with the north of Sudan ended in 2005. While the literature emphasizes the role of such actors as (ex-)combatants and unemployed and disenchanted urban youth in urban violence after war, the analysis presented here demonstrates the complexity of the underlying causes of land violence and the opportunism of a range of civilian and military actors seeking to benefit from the post-war context.