Designing opportunities for play in the built environment is crucial to support children’s health and development. A growing research focus on child-friendly environments has evidenced a shift toward creating spaces and buildings that take children’s needs seriously and work with children as capable experts and active collaborators. Yet, limited attention has focused on how different scholars conceptualise and operationalise research on understanding and designing opportunities for play in the built environment. This paper reports on the findings of a scoping review of peer-reviewed empirical literature (51 publications) from 1994 to 2019.