The Inter-Agency Policy Brief on Accelerating SDG Localization to deliver on the promise of the 2030 Agenda for Sustainable Development is now available. This policy brief seeks to highlight the importance of integrating a multilevel governance approach within decision-making and policymaking processes and mechanisms. It does this in order to support the localization of the Sustainable Development Goals (SDGs) and is aimed at civil society and all levels of government. This brief also provides information on the context of multilevel governance, as well as on the challenges facing it. It then makes recommendations for fostering this important approach. In doing so, this brief seeks to assist policymakers and urban development practitioners in developing vertical and horizontal institutional integration and policy coherence.