Bamboo, primarily found in tropical and subtropical regions, is commonly used to design and support temporary structures, which generate vast amounts of waste and require substantial dumping land. Bamboo waste can be cut down by converting them into biochar. In addition, the effect of bamboo biochar (BB) amendment on consolidation properties is missing in the previous literature. Hence, BB produced from bamboo biomass has been used in this study. Moreover, low plastic clay and silty sand soil are primarily used as landfill cover material. So, the objective of the current study is to overcome this research gap. Furthermore, referring to past literature, BB was mixed with both soils in five ratios, i.e., 0, 1, 2, 3.5 and 5% of dry soil weight and kept in a desiccator to achieve homogeneity. Then, compaction (ASTM D698) and consolidation (ASTM D2435) tests on non-amended and BB-amended soil were carried out in the laboratory in accordance with the ASTM standards. The results showed that the addition of BB to both soils decreased maximum dry density and increased optimum moisture content. The consolidation results of the amended soil showed that up to 2%BB amendment in low plastic clayey soil decreased the void ratio by 5.08% and permeability by 84.22% while further increment increased the void ratio with the increment of pressure. The surface morphology analysis of these samples also showed a decrease in pores size at 2% biochar amendment and an increase in pores size with further addition of BB. In contrast, the void ratio of bamboo biochar-amended silty sand continuously increased with the biochar increment rate. The decreased void ratio and permeability of low plastic clay soil at 2% BB amendment provide evidence that it could be used as a landfill cover material. The findings of this research could be insightful for engineers and researchers dealing with biochar-amended soil for geotechnical and geoenvironmental projects.