Expansive soil is one of the vastly researched materials in geotechnical engineering owing to its rapid volume change behaviour upon contact with water. This volume change creates serious distress for lightweight structures and embankments built on them. Hence, the volume change behavior of the soil is arrested by applying various methods of stabilization. Chemical stabilization has been the go-to method of stabilization for problems related to expansive soils, as chemical stabilization changes the fundamental characteristics of the expansive soil to behave as a non-expansive material. However, in the last decade the use of chemical additives for the stabilization of expansive soil has been consistently reduced due to global warming and to reduce the carbon footprint. Hence, the search for an alternate method that is sustainable has been the foremost for researchers. In recent developments, more sustainable stabilization methods such as microbial (or) enzyme-induced calcite precipitation techniques and bio-polymers have been used to stabilize expansive soil. Of the above methods, bio-polymers as stabilizers are more viable owing to their ease of use and fewer uncertainties with regard to field placement conditions. The critical limitation of the use of biopolymers is their durability, as biopolymers degrade over time. To control the degradation, the present study evaluates the behaviour of carboxy methyl cellulose (CMC) in the stabilization of expansive soil. The scope of the present study was limited to three concentrations of biopolymer (1, 4 and 7%). The efficiency of the CMC was analyzed by comparing changes in the physicochemical and index properties of stabilized and unstabilized soil. Based on the present study, it can be concluded that the use of CMC improved the physicochemical and index properties of the expansive soil by altering the hygroscopic nature of the expansive soil.