This research delves into the innovative use of eggshell powder (ESP) to enhance sandy soil stability for shallow foundation design, offering a thorough analysis of its potential benefits as a sustainable ground improvement method. With the increasing global need for sustainable construction methods, it is essential to investigate environmentally friendly options. Eggshells, plentiful and frequently seen as trash, exhibit favourable characteristics for soil stabilization. This study explores the advantages of utilizing ESP in both mechanical and environmental aspects, seeking to offer a comprehensive insight into its effectiveness. Laboratory tests, such as soil characterization and unconfined compression tests, evaluate how different levels of ESP concentrations affect the engineering properties of sandy soil. The research broadens its significance by analyzing shallow foundations on soil treated with ESP through computer simulations, confirming experimental results, and offering an understanding of durability and weight-carrying ability over time. The results help support sustainable practices in geotechnical engineering, providing a practical way to reduce the environmental effects of waste materials in construction.