Children, and Young People’s (CAYP) mental health represents a significant and growing challenge worldwide, with huge and growing societal costs. A significant proportion of this burden is carried by Low- and Middle-Income Countries (LMICs) where 90% of the world’s children and adolescents live. These areas are also most affected by displacement and the associated acute and enduring impacts on mental health. Over the past decade great strides have been made in the treatment of child and adolescent mental health conditions in High Income Countries (HICs), providing a strong evidence-base to underpin service development and provision. Without the research and development infrastructure, well-resourced, publicly available health services or societal familiarity with mental health treatments, the evidence base for mental health treatments in LMICs is far less clear. Many treatments that are offered are simply a replication of interventions provided in HICs, risking low transferability and high treatment drop-out rates. Localised contextual factors for those displaced CAYP, such as poverty, high levels of trauma, persistent threat, low clinician skill, the absence of clinic space, overburdened services, different family roles and composition suggest the need for adaptation is paramount. This chapter discusses the potential of adopting the STAIRS framework for the development and delivery of psychosocial interventions for displaced CAYP. We explain the suitability of STAIRS due to its grounding in ecological systems theory, suitability for delivery by generalist practitioners, and emphasis on collaboration and sustainability beyond the direct input of trainers.