The rapid increase in plastic and electronic waste has created significant environmental and disposal challenges worldwide. This study investigates the potential use of waste plastic and e-waste materials as partial replacements for natural aggregates in concrete to develop a sustainable and eco-friendly construction material. The waste materials were collected, cleaned, and processed into suitable sizes before being incorporated into concrete mixes at varying proportions. Experimental evaluation was carried out to study the effects on key properties such as compressive strength, tensile strength, density, and durability. The results indicate that the inclusion of plastic and e-waste aggregates reduces the overall weight of concrete while maintaining satisfactory strength for non-structural applications. Additionally, the use of these waste materials contributes to reduced consumption of natural resources and minimizes environmental pollution caused by improper disposal. The study demonstrates that such innovative material substitution can offer a practical solution for sustainable construction while supporting effective waste management practices.