Infrastructural and industrial development has resulted into generation of waste products which gave rise to problems related to disposing off the waste as well as exhaustion of natural materials such as sand. The current experimental investigation seeks to tackle challenges associated with waste materials and overutilization of natural construction resources. With the aim of reducing waste buildup and restricting the overutilization of sand in construction, specific waste materials can be integrated into concrete as substitute materials. One such material is powder obtained from marble waste (WMP); which is by-product of marble stone finishing work. In the current research, natural sand was substituted with WMP at four different levels: 0%, 30%, 60%, and 90%. Concrete specimens of the M30 grade were fabricated to examine the concrete’s strength, encompassing compressive, tensile and flexural strength, alongwith its durability through the Rapid Chloride Permeability test at both 28 and 91 days. The concrete’s strength rose as the amount of WMP raised, according to the experimental program’s preliminary findings. The highest increment in resistance against compression was perceived in mix containing 60% WMP (36.96% at 28 days and 68.78% at 91 days) in contrast to the mix’s strength at twenty eight days with 0% WMP. On comparing the strength values of mix with 60% WMP at twenty eight days and 91 days, it became apparent that the increase in strength was 23.23%. The similar pattern was observed in tensile and flexural strength as well. RCPT values demonstrated a decrease in concrete permeability as the WMP percentage increased. Pursuant to the outcome of the current research, leftover marble powder may be employed in lieu of natural sand in concrete to transform its characteristics while also being kinder to the environment.