Lightweight concrete provides numerous benefits compared to conventional concrete, like reduction in dead load and operating costs. One of the prime methods of producing structural lightweight concrete is the utilization of lightweight aggregates. The relevance of waste substances as cement alternate or aggregates in concrete can help a solution in order to reduce negative influences of the concrete industry. One of the agricultural solid wastes derived from the industry of coconut is coconut shell (CS) which processes about 40% lower weight compared to normal weight aggregates. The paper reveals an investigation on the coconut shell as coarse aggregate as well as class F fly ash and sugarcane bagasse ash as complementary cementitious material to produce more environmentally adorable lightweight concrete. Based on the research outcome, the eco friendly structural lightweight aggregate concrete has the ability to be prepared by combining three kinds of waste substances: coconut shell as coarse aggregate and blended Class –F flyash and sugarcane bagasse ash (SCBA) as a substitution for cement (by mass) up to 60%. The process of replacing the cement by blended Class –F flyash and sugarcane bagasse ash leads to density reduction.