Experiences of family conflict are common in young people's accounts of homelessness, yet in‐depth explorations and conceptualisations of these experiences remain sparse. Drawing on focus group discussions with 29 participants, this article explores the accounts of young people and carers and parents about the dynamics, interactions and characteristics of family conflict. Findings highlight the primacy of verbal insults, criticisms or threats, as well as acts of aggression and violence in young people's and parent's understandings of family conflict. Feelings of mistrust, instability and a lack of safety also pervade family conflict and are considered its most impactful elements. We contend that these impacts are best understood via the concept of ontological (in)security, whereby young people's sense of self, belonging and stability are undermined by family conflict. This provides important insights for developing practice in this space, where working to remove long‐term patterns of family conflict, restoring young people's sense of self and belonging within their family, and supporting the stability and trust within a family may prove beneficial.