I Iquefaction is a significant threat to urban areas with water-saturated alluvialsoils, especially in seismically active zones such as west jakarta. based on conepenetration test (cpt) data from 25 locations, soil vulnerability was evaluatedthrough the analysis of cyclic stress ratio (csr), cyclic resistance ratio (crr),and magnitude scaling factor (msf). locations with a safety factor (fs) value ofless than 1 were identified as zones with a high potential for liquefaction.residential buildings were classified based on floor area and assessed using the2024 tax object selling value (njop) to estimate potential financial losses. thepercentage of structural damage was determined based on seismic intensitythresholds and empirical damage functions. the analysis results showed that areaswith medium to soft soil conditions, particularly in the northern and western partsof west jakarta, have the highest vulnerability levels. the total estimated lossreached idr 21.23 trillion, with the largest concentration of damage occurring inmedium and large house types. these findings emphasize the importance ofintegrating geotechnical parameters in spatial risk mapping and disastermitigation planning. this analysis, which combines soil characteristics, seismicparameters, and economic valuation, provides an approach that can be expandedfor early warning systems and resilience-oriented urban planning. this studycontributes to data-driven risk management strategies aligned with sustainabledevelopment goals and adaptive infrastructure policies.