The significant environmental impacts of a two-story residential building in the study region have been estimated using open source data. The structure has a floor area of 222.96 m2 and is expected to have a life period of 50 years. In this study, Life Cycle Environmental Assessment (LCA) of the building has been performed using unit impact values obtained from research papers having related scope and context. It has been used to determine the building’s life cycle energy consumption and Greenhouse gas (GHG) emissions. According to the analysis, it has been observed that the first floor of the building contributes more to the total impact. Moreover, only 69.66% of total energy is consumed during the operation phase. In most buildings, the life cycle stages have a significant impact on some categories, even though, only two life cycle stages, i.e., construction and operation appear to be more significant in all impact categories (energy and emissions).