Efforts to address adolescent sexual and reproductive health (ASRH) inequities often aim to improve school-based sexuality education and reduce individual risk behaviours. Structural determinants are more rarely the focus of interventions. The youth service providers who formed the community advisory board for this community-based participatory research project identified school-based opportunities to improve ASRH by mitigating the impact of social determinants and structural violence on adolescent health. Semi-structured interviews with board members revealed four areas of potential social support intervention that could mitigate these structural determinants, including mentorship, especially for young people who lack supportive relationships at home; small adult-facilitated groups and clubs at school; staffing and training to meet the needs of historically marginalised students; and school-based counselling. These findings indicate the need for school-based programmes that transcend conventional and short-term didactic forms of sexuality education, to foster social support and address interconnected structural factors affecting ASRH.