In my article "When knowledge is power: grassroots participatory initiative as a process of resource development" I claim that residents are initiating informal grassroots participatory initiatives to intervene in planning-related decision making and adjust planning deliverables according to their spatial interests, perspectives, and needs (i.e., local knowledge). In the process of addressing their goals, residents face powerful players, e.g., jurisdictions and private developers. The question arises: which resources could help residents interact with powerholders to obtain their support for incorporating local knowledge into plans? Based on two case studies this paper claims that communal resources – including environmental and civic awareness, social capital, planning knowledge and political capital – are needed to develop residents’ initiative and increase residents’ success in incorporating local knowledge into planning.