In the face of rapid and uneven urbanisation, the marketisation of space, growing polarisation and inequality, and the proliferation of gated communities, walls, fences, and surveillance infrastructures, there is an increasingly urgent need to rethink our core assumptions about the agenda of urban research and design, beyond the Western context. This talk proposes Just Urbanism as a conceptual tool for reimagining an urban design practice rooted in vitality, relationality, and informality. It invites reflection on how improvised spatial arrangements and informal organisations can open up new possibilities for more just, inclusive, and situated urban futures.