Reliable foundation design in coastal and deltaic terrains requires detailed characterization of subsurface conditions due to the prevalence of weak, compressible soils. This study presents the results of a site-specific geotechnical investigation conducted for a proposed threestorey building at Polaku Community, Gbarian Clan, Yenagoa LGA, Bayelsa State, within the Niger Delta. Three boreholes were drilled to depths of 24–25 m using rotary wash boring, and Standard Penetration Tests (SPT) were performed at 3 m intervals. Subsurface stratigraphy revealed three (3) principal units typical of deltaic environments: soft clay (0–6 m), medium dense sand (6–12 m), and dense to very dense sand/gravel (below 12 m). SPT Nvalues ranged from 4–7 in the upper clay layers to over 80 in the deeper granular strata, indicating significant improvement in stiffness and relative density with depth. Undrained shear strengths for clays derived from Skempton correlations ranged from 16–28 kPa, while friction angles for sands (based on SPT correlations) ranged from 31.6° to 42°. Ultimate and allowable bearing capacities were computed using Terzaghi and Meyerhof formulations. Shallow cohesive layers yielded low allowable pressures (27–48 kPa), unsuitable for conventional shallow footings, whereas deeper sand layers produced significantly higher allowable capacities (245–979 kPa), sufficient to support multi-storey structures. Comparative evaluation with regional studies confirms that foundations bearing on the deeper dense sand layer will ensure safe performance. The study concludes that while near-surface soils require improvement or avoidance, the deeper granular strata provide competent bearing material for the proposed structure