Growing population and acute shortage of land have led to land reclamation in many countries. Numerous geotechnical problems are encountered during construction activities in soft clay deposits due to their low shear strength and high compressibility. The compressibility characteristics of clay are of significant interest in the geotechnical engineering field because they directly correlate with the overall settlement of structures. The consolidation attributes of soil are predominantly influenced by its clay content. The swelling behavior exhibited by expansive soils frequently causes detrimental issues, including differential settlement and ground heaving. This study explored the impact of various additives (lime, cement, and fly ash) on the coefficient of consolidation and compressibility properties of two distinct soil types, namely kaolinite and bentonite. To assess the impact of these additives, each one was incorporated at three different percentages (3, 6, and 9%) relative to the dry soil weight. Subsequently, one-dimensional consolidation tests were conducted, and the outcomes were compared with those of untreated soil samples. The analysis revealed a notable enhancement in the compressibility traits following the addition of additives. Specifically, the treated samples exhibited accelerated consolidation compared to the untreated ones. Additionally, it was observed that the coefficient of consolidation (cv) decreased as the applied pressure increased, stabilizing to a more consistent level at higher pressures. These findings suggest that incorporating suitable additives into soft clays can effectively mitigate their undesirable properties, offering a practical solution for various geotechnical applications.