Intellectual disability (ID) persists from birth through adulthood and aging. Thus, the support provided to individuals with intellectual disabilities (IwID) in adulthood is essential to increase their self-determination and quality of life. This research aimed to determine how IwID may receive support for education, working life, accommodation, and leisure in adulthood in the Turkish context by increasing their and their families' quality of life without socially discriminating against them. Qualitative data were collected in two stages, combining semi-structured interviews and the Delphi study technique. Results prompted the recommendation that a legal basis for transition-to-adulthood planning be established in Turkey for a functional adult service model. Next, a model with specific standards by which multidisciplinary experts analyse education, work, leisure, and housing alternatives for preadulthood and adulthood should be developed and coordinated by the Turkish Ministry of National Education and the Ministry of Family. Implications for the future are further discussed.