Jakarta landscape was predicted under sea level after 20 years, hence vulnerable for coastal flooding (Rob). According to ALOS/PALSAR image model, land subsidence is around 10 cm per year. Furthermore, degradation of living environment due to rapid population growth makes Rob area widened. This research aims to analyze socio-economical impact of Rob occurences which covers risk elements of destruction, vulnerability and adaptation capability. The study area in North Jakarta was divided into three clusters according its Rob characterization. Sustainability factor analysis was done through Radar Chart interpretation. Livable City Index (LCI) was evaluated by 15 variables. Soft System Methodology (SSM) used to identify Rob adaptive strategy. Main impact of Rob was found on decreasing of people health, especially children (48%), and disruption of community economics activities (37%). LCI was calculated 2.00 (hazardous) for cluster 1, 2.27 (inconvenience) for cluster 2 and 3.23 (comfortable) for cluster 3. According to Purposively Activity Map, adaptive strategy for Rob are better city planning policy, maintenance of dams, and flood control rehabilitation. Rob prevention includes settlement spatial arrangement, road and sidewalks, drainage and clean water provision. Community participation is encouraged, especially in relief funds management and garbage disposal at coastal area.