Construction on the black cotton soil, a form of troublesome expanding soil, has various difficulties. It has a swollen and impermeable nature with poor sub grade geotechnical properties. This study takes a stab at improving the different geotechnical qualities of black cotton soil, such as index values, swelling characteristics, and so on. In this study, the soil samples were subjected to UCS, and consistency limit tests using different quantities of Terrazyme and rice husk ash. Black Cotton Soil is regarded as a flimsy substance because of its limited strength and capacity to withstand large loads. The soil must be stabilized in order to sustain the added weight. The soils engineering qualities will improve as a result of stabilization. Throughout the monsoon season, BCS gathers rainwater from the surface and evaporates it during the summer. An expansive soil is one that has a lot of water holding it together. Its greyish-to-blackish mineral made of montmorillonite clay. It includes calcium carbonate. As a result of introducing stabilizers, weak or brittle expansive (weak) soils may be made stronger and stiffer overall. In this study stabilizers used are rice husk ash and Terrazyme.