This study investigates the combined effects of incorporating rice husk ash (RHA) and multiwalled carbon nanotubes (MWCNTs) as additives to bolster the strength parameters of concrete. Concrete, being one of the most widely utilized construction materials, constantly faces the need for improvements in strength and durability. RHA, a by-product of agricultural processing, and MWCNTs, a novel nanomaterial renowned for its exceptional mechanical properties, are being examined for their potential as reinforcing agents in concrete. The experimental investigation entails the fabrication of concrete specimens with varying proportions of MWCNTs (ranging from 0.025 to 0.125%) alongside a fixed proportion of RHA at 20%. These specimens are subjected to comprehensive testing to evaluate parameters such as compressive strength, flexural strength, and tensile strength. The results highlight the positive influence of RHA and MWCNTs on the mechanical properties of concrete, showcasing enhanced strength and potential applications in sustainable construction practices. This research contributes to advancing concrete technology by proposing an eco-friendly approach to enhancing the performance of concrete, thereby addressing the growing demand for resilient and sustainable infrastructure materials.