This study investigates the local seismic response of a post-landslide area in Mendala Village, Brebes Regency, Central Java, as a basis for planning permanent housing development. The research area is located within the Sedimentary Pliocene Formation (Tpsb), which is dominated by fine-grained sediments that are susceptible to seismic wave amplification. Microtremor measurements were conducted at 35 observation points using a three-component seismometer. The Horizontal-to-Vertical Spectral Ratio (HVSR) method was applied to determine the dominant frequency (f₀) and amplification factor (A₀), which were subsequently used to calculate the seismic vulnerability index (Kg), Peak Ground Acceleration (PGA), and Ground Shear Strain (GSS). The results indicate significant spatial variations in seismic response across the study area. Zones characterized by low dominant frequencies (1–3 Hz) and high amplification factors (A₀ ≥ 6) are mainly distributed in the northern to northeastern parts, indicating the presence of soft sediment layers with strong impedance contrasts. These areas are associated with high seismic vulnerability values (Kg ≥ 0.0006), PGA exceeding 80 gal, and GSS ranging from 10⁻⁵ to 10⁻⁴, suggesting a potential for soil deformation such as cracking and differential settlement. In contrast, the southwestern sector exhibits higher dominant frequencies (4–8 Hz), lower amplification, and reduced vulnerability, reflecting relatively more stable subsurface conditions. The integration of HVSR-derived parameters provides a practical framework for seismic response zoning and identifying areas requiring additional engineering measures. This study serves as an initial post-disaster assessment and emphasizes the need for further detailed geotechnical investigations prior to the construction of permanent housing.