Organisations delivering youth services in residential settings face a particular set of challenges when it comes to evaluation. Young people often access multiple forms of support at once, such as housing, mental health, mentoring, and life skills, within the same setting. Outcomes arise from combinations of services, and no two journeys are quite the same. The result is a complex intervention: difficult to measure using standard approaches, and often too varied for evaluation to be built into everyday practice. This toolkit helps youth service providers working in residential settings embed evaluation into their routine delivery. It is structured around the six stages of the evaluation cycle: audit, outcomes and measurement design, evaluation design, tool design, analysis, and reporting. Each stage has its own section (left), with clear instructions and ready-to-use tools. Follow the cycle step by step to design, collect, analyse and report meaningful evidence of your service's impact on young people, in a way that reflects the reality of residential delivery.