This article presents the principles and findings of developing a new participatory assessment of development (PADev) evaluation approach that was codesigned with Dutch nongovernmental organizations (NGOs) and northern and southern research institutes over a period of 4 years in the context of rural development in Ghana and Burkina Faso. Although participatory approaches in development evaluations have become widely accepted since the 1990s, the PADev approach is different by taking the principles of holism and local knowledge as starting points for its methodological elaboration. The PADev approach is found to have an added value for assessing the differentiated effects of development interventions across different subgroups in a community through intersubjectivity. Moreover, if PADev is taken up by a multitude of stakeholders, including the intended beneficiaries of development interventions and development stakeholders, it can contribute to a process of local history writing, knowledge sharing, capacity development, and providing input into community action plans and the strategies of community-based organizations and NGOs.