Abstract-Social capital has the important role in common policy and developmental issue. Development requires public involvement and government initiative with two ways policy communication based on "trust" and "social network". In Kali Code riverbanks-Yogyakarta development, which is geographically disasterprone area, the development ideas dialectic has to follow more intensely. This purposive sampling method was done by interviewing Yogyakarta Municipality, community activists, and environment activists. The finding is that the dilemma in disaster-prone area development course proposed by the government, caused people boost their development ideas with social capital approach. So some main programs which change Kali Code Riverbanks arise, from disaster-prone to become relatively safer and has economics values.