Recent advances in the literature regarding local government and governance are demonstrating that models of intermunicipal cooperation are becoming widespread and having an impact on both the organizational dimension and the policy making/service planning side. The success of these arrangements can vary according to several variables such as the regional context, and the services on which is focused the cooperation and the presence/absence of normative constrains that promote these models of cooperation. The aim of this article is to develop a better understanding of a new regional policy focused on area social plans which requires a change in the governance of interorganizational collaborations. This article addresses the gap in the literature on local governance of interorganizational collaborations and area social plans. An empirical study was conducted of four emblematic case studies in one of the most important Italian regions. The results confirm that the new governance of interorganizational collaborations must be characterized by positive interaction between structures, processes, and actors. The results also showed that the presence of certain circumstances such as close ties, many pre-existing relations among the municipalities, and a high level of trust among political parts and administrative offices, appears to smooth the path to success of intermunicipal coordination.