Adequate soil strength is crucial for structural stability. But heavy metal contamination weakens soil, compromising its ability to support structures. This research investigates the impact of lead, cadmium, and chromium contamination on  the geotechnical properties of the soil and evaluates Sugarcane Bagasse Ash (SCBA) as a sustainable stabilizer. Laboratory experiments show that heavy metals, particularly lead, significantly reduce soil strength. However, stabilizing contaminated soil with SCBA-Ordinary Portland Cement (OPC) admixture markedly improves strength, with chromium-contaminated soil exhibiting a 110% increase. The study finds that incorporating 15% SCBA optimally stabilizes soil, making SCBA a viable, eco-friendly alternative to OPC. These findings offer practical solutions for soil remediation and contribute to sustainable geotechnical engineering practices.