The widespread planting and production of coconut in Region 8 results in a growing volume of coir dust (CD) being thrown as agricultural waste and seen as an environmental and health threat. These wastes can be used as a sand substitute in the manufacture of concrete hollow blocks (CHB), the compressive strength of which is compared to that of conventional CHB. The cement and water were kept constant, but three different sand-CD ratios were utilized, each with three samples. Once all samples had reached the required curing period, their compressive strength was determined, and it was discovered that increasing the amount of fresh CD in CHB resulted in a decrease in the material's compressive strength. Thus, CHB with a 25% CD content can be used as partition blocks for environmental and technological goals rather than as load-bearing concrete hollow blocks.