Across the globe, pavements are commonly built atop normal soil subgrades, leading to reduced service life due to increased rutting and necessitating frequent maintenance as failures propagate throughout the pavement structure upon subgrade failure. To address this issue and achieve long term pavement performance, soil subgrades require stabilization through various techniques employing different stabilizers. Among these, cement stabilization stands out as a promising method to fortify soil subgrades, providing a robust foundation for pavements and enhancing their longevity compared to untreated soil subgrades. In this research, three alternatives conventional flexible pavement, reclaimed asphalt pavement and semirigid pavement for stabilized and unstabilized soil subgrades are defined for long term pavement construction, and their initial construction costs are thoroughly compared. Pavement design is executed using the IITPAVE software in adherence to Indian standards, while material costs are sourced from the Schedule of Rate-Ahmedabad District (2023–24). Through this study, insights into the comparative costs of different soil subgrade stabilization methods are provided, offering valuable guidance for pavement construction endeavors aimed at maximizing durability and minimizing lifecycle costs.