Rainfall-induced landslides are prevalent in tropical and subtropical regions. The infiltration of rainwater into initially unsaturated slopes increases the degree of saturation, subsequently reducing suction. Consequently, the shear strength decreases, leading to a decrease in the factor of safety (FoS) along the critical slip surface. Anthropogenic activities are one of the primary triggering factors for rainfall-induced slides in hilly regions. Cutting hills for construction purposes such as buildings, roads, or other structures, disrupts the natural subsurface water flow. If this subsurface flow is not diverted, pore water pressure can accumulate, leading to slope failures. In the study presented, a construction project in the hilly region of Guwahati in Assam is studied for slope stability. The project involves hill cutting and proposes the construction of several retaining walls. A coupled analysis of flow and slope stability was performed on slope cross-sections created from the contour map of the region, considering the presence of retaining walls, to estimate the stability. The soil profile consists of a three-layer composition, starting with reddish clay soil up to a depth of 2–5 m, followed by a layer of hill sand 5–10 m deep. The bedrock underlies the hill sand layer. Additionally, seismic analysis will be conducted using a pseudo-static approach for seismic slope stability. The vertical seismic coefficient (kv) is assumed to be half of the horizontal coefficient (kh), which is computed to be 0.14 and 0.07, respectively. A small vehicular load of 4.8 kPa will be applied to the road sections.