Abstract: Geophysical investigation for engineering/environmental studies has been undertaken at Adagbakuja Newtown Southwestern Nigeria. The study is aimed at assisting in the planning and development process of the proposed new town. The proposed town is underlain by Dahomey Sedimentary Basin and proximal to the Atlantic Ocean shoreline. The electrical resistivity method utilizing the schlumberger electrodes configuration was adopted. Sixteen sounding locations were occupied on traverses established in the virgin area. Interpretation of the sounding curves showed that the site is underlain by mud/clay topsoil, organic clay substratum, silty clay and fine/medium grained sand. The entire geoelectric strata are characterized by very low resistivity values (0.4-1527.6 -m) thus indicating high moisture content and high salinity. The bedrock materials are characterized by relatively high resistivity values (2.1-1527.6 -m) that are characteristic of fine/medium grained sand with a possibility of relatively higher density and higher load bearing capacity. The depth to the upper silt/fine sand unit that can support foundation of small to medium size structures varies between 3 m on the northern flank to 11 m on the south with thickness varying between 8 and 11 m. The higher resistivity geoelectric units can presumably sustain foundations of large civil engineering structures. The sands occur at depths varying between 24 m in the north and 58 m on the southwestern edge close to Asisa and Abeotobo. Overburden protection capacity of the superficial deposits in the environment varies from 2.288 mhos (good) on the eastern flank of the area at VES 7 to 80.214 mhos (excellent) at the western end (VES 11). Thus, fresh groundwater protection within perched aquifers is envisaged while very deep aquifer units with thick overlying clay column are also likely to meet protection requirements. The soil resistivity at depths greater than 1.5 m (normal depth of burial of water and other utilities pipes) varies from 0.4-101.6 -m in the environment. The degree of soil corrosivity within the Adagbakuja Newtown varies from moderately corrosive on the eastern flank to very strongly corrosive on the west. Corrosion prevention system should be considered at engineering design stages of steel/metal structures in the new town.