Mental health and capacity laws applicable to children and young people in Northern Ireland (NI) lack clarity and coherence, with significant gaps in service provision and safeguarding. Drawing on an examination of such laws, we argue that law reform is needed. In the short term, we suggest there is merit in publishing statutory guidance, such as a Code of Practice, to address both the issue of evolving capacity in children and to facilitate best practice in policy and practice. This modest reform in the short term should be accompanied by a firm political commitment to ensuring that NI's innovative fusion mental capacity legislation is fully brought into force in the medium term. Meanwhile, law reform should form part of a holistic approach on the part of NI's policy-makers towards improving mental healthcare provision for children and young people in line with a human rights-based approach. This would include the following: increased allocation of funding and resources to facilitate more timely access to suitable treatment and related services; enhancing participation in policy, judicial, and clinical decision-making that impacts their lives; and employing a range of executive accountability mechanisms to drive improvements in such provision over time.