Despite the growing research interest in co-production, some important gaps in our knowledge remain. Current literature is mainly concerned with either the citizens or professionals being involved in co-production, leaving unanswered the question how co-producers and professionals perceive each other’s engagement, and how this is reflected in their collaboration. This study aims to answer that question, conducting an exploratory case study on neighborhood watch schemes in a Dutch municipality. Empirical data are collected through group/individual interviews, participant observations, and document analysis. The results show that the perceptions citizens and professionals hold on their co-production partner’s engagement indeed impact on the collaboration. Moreover, for actual collaboration to occur, citizens and professionals not only need to be engaged but also to make this engagement visible to their co-production partner. The article concludes with a discussion of the practical implications of these findings.