Social capital is an important primary outcome of collaborative planning and is deemed a precursor to arriving at successful collaborative planning outcomes such as more effective collective action and both individual and social benefits. Although commonly used definitions of social capital stress the importance of social networks, recent scholarly research tends to overlook the importance of understanding how collaborative efforts influence the formation of new relationships and the structures of these relations (social networks) and in turn how these influence success. This article documents the application of social network analysis methods in the evaluation of a collaboration's effectiveness at building social capital, the structures of these relations, the factors that influenced positively and negatively their formation, and finally, the influence of the social networks on realizing successful outcomes.