Community renewable energy projects have captured significant attention due to their potential to tackle climate change by socially and economically empowering local societies. Recently, however, various difficulties in the continuity of such projects over extended periods of time have been reported. As a case study, this article explores a woody biomass project, planned and put into practice by local people, which has lasted for over 10 years. The article first examines the process of collective decision-making among members who have diverse motivations. It then focuses on how the project objectives have been interpreted by individual members, paying particular attention to each member’s practice. The article shows that decisions related to the project were based on the diverse and constant social interactions between members, which focused on their collaboration rather than overall quantitative goals. I argue, both theoretically and empirically, that this vagueness of the overall goals has enabled the project’s continuity. Based on their own practices, it has allowed each project member to interpret the project and to gain a sense of its success. Diversity of practices within a project leads to plural sets of values, which bring sustainability to a project running in an uncertain context.