The construction industry generates a significant volume of construction and demolition (C&D) waste, leading to both environmental concerns and economic challenges. Sustainable pavements minimize environmental impacts with innovative solutions. India faces challenges with expansive soils affecting road durability. Life Cycle Assessment (LCA), Life Cycle Cost Analysis (LCCA) and carbon footprint analysis are critical tools for sustainable construction, enabling environmentally cognizant design. The study aims to assess the economic and environmentally potentiality of geocell-reinforced pavements utilizing C&D waste. A comparative analysis of rigid pavement, flexible pavement, and C&D waste pavement is conducted using the TOPSIS decision-making model and a 7-point Likert scale survey. Additionally, the study calculates the carbon footprint of employing geocell-reinforced C&D waste on expansive soils. The results are then compared with those of conventional pavement designs to determine the environmental and economic benefits of the proposed approach. This study is limited to evaluating geocell-reinforced C&D waste pavement constructed on expansive soil, excluding other reinforcement or waste material combinations. Expansive soils require detailed evaluation under varying conditions. Geocell-reinforced C&D waste pavements offer enhanced structural performance, making it a promising approach for pavement engineering. Sustainable pavement design with reduced costs and lower environmental impact. Geocell-reinforced pavements are effective for expansive soils in road construction, applicable in highways, urban roads, and infrastructure over challenging soil conditions. The results indicate that C&D waste pavement is the most sustainable option due to its lower carbon footprint, reduced fuel consumption, and high recyclability. The conclusion of this research supports geocell reinforcement and C&D waste utilization provide an eco-friendly and budget friendly alternative for building pavement on large area of unstable ground.