T The development of construction projects in Indonesia has increased rapidly, in the process of building construction projects resulting in the phenomenon of the greenhouse effect. One of the results of the greenhouse effect on construction projects is carbon dioxide (CO2) emissions. One of the essential parts of a construction project is the substructure or foundation. The substructure or foundation work uses a reinforced concrete structure. Reinforced concrete structures are a source of carbon emissions in construction projects. This study aims to determine how much carbon emissions are produced in bore pile work at the GBK Multifunctional Indoor Stadium project. Another goal of this research is to determine efforts to reduce carbon emissions in bore pile work. The results of the analysis of carbon emission calculations on bore pile work at the GBK Multifunctional Indoor Stadium project amounted to 7726906,2 kg.CO2. The results of this study show that the amount of labor, material requirements, tool and engine capacities, and fossil fuels affect carbon emissions. In addition, the results of this study are that the larger the pole size and the more piles that will be used, the greater the carbon emissions will be produced. Efforts to reduce carbon emissions in bore pile work are to determine the number of piles and the size of the piles that can withstand a predetermined load and produce more minor carbon emissions.