Expansive soils are problematic soils that have high degree of volume change with variation in moisture content. This volume instantly results in significant levels of distress on lightly loaded structures constructed on such deposits including road pavements. Such soils unless stabilized, pose a serious risk to the satisfactory functioning of the constructed facility. The most common stabilizers adopted for expansive soil are lime and cement. In this investigation, an attempt has been made to understand the influence of cement stabilization, fibre reinforcement and combination of cement stabilization and fibre reinforcement on the compaction characteristics of an expansive soil. An expansive soil was sourced from a metro station construction site in Westcott Road, Royapettah, Chennai, Tamil Nadu 600014. The soil was characterized for its geotechnical properties in the laboratory and was found to be expansive in nature. To stabilize the soil, cement and polypropylene fibres were used. Three different proportions of cement viz. 10, 15 and 20% were used. The polypropylene fibre dosages adopted were 0.5, 1 and 1.5%. The compaction characteristics and unconfined compressive strength of the cement stabilized soil, fibre reinforced soil and fibre reinforced cement stabilized soil were carried out to understand the influence of the stabilizer and fibre on the compaction characteristics and strength to optimize the right dosages of the external additives. The results of the investigation revealed that 15% cement with 1% fibre was found to be the optimal dosage for maximum strength. It was also found that the addition of optimal dosage of PPF to cement stabilization could reduce the cement content required for stabilization, thereby contributing to reducing the carbon footprint of the stabilization process.