AbstractHoarding behaviours can cause numerous problems including health risks, family conflict, and removal of children and pets from the home. Hoarding research typically adopts a cognitive‐behavioural framework and uses quantitative methods; we aimed to further understand the development of hoarding behaviour from a qualitative perspective. Constructivist grounded theory methods were employed across two phases of data collection via semi‐structured interviews with participants identifying as exhibiting hoarding behaviours. Provisional categories were developed in phase one; further data analysis in phase two helped to establish our grounded theory. The theoretical core is a struggle to manage possessions and life, including life transitions such as moving to a new home and starting or finishing university. ‘Struggling to manage’ incorporates emotional struggles with possessions and the impacts of personal trauma and overwhelming life events. A further category, ‘Trying to overcome hoarding’ incorporates participants' efforts to manage and overcome their hoarding. Findings highlight the importance of viewing hoarding in a holistic context.