The quality of life of young adult residential care leavers is influenced by several factors. The impact of the residential care environment can be conceptualised as organisational culture. In our empirical study we explored how organisational culture affects the quality of life of care leavers. The research was conducted using a combination of qualitative and quantitative methods in 8 selected residential care facilities in Slovakia, and among 39 young care leavers. Data from semi-structured interviews were analysed using methods associated with grounded theory, and data obtained via questionnaires were analysed using statistical methods. The results show that adequate material conditions, adherence to facility rules, the space to act independently, responsive care, support in planning for the future, mutual assistance, and social support from peers and others are all likely to contribute to a higher quality of life for care leavers.