Urban regions are responsible for a significant portion of global greenhouse gas (GHG) emissions, with approximately 70% of energy-related CO2 emissions coming from cities. As urban populations grow, understanding and addressing the environmental impact of these areas becomes increasingly critical. This study focuses on Mumbai’s L Ward, a densely populated region that includes Kurla, and evaluates GHG emissions from key sectors such as energy consumption, transportation, waste management, and water treatment. Using methodologies based on the Intergovernmental Panel on Climate Change (IPCC) guidelines and the GHG Protocol, the research estimates that L Ward generates about 1.95 million tonnes of CO2 equivalent annually. This results in per capita emissions of approximately 2.07 tonnes, highlighting the substantial carbon footprint of this urban area. The findings underscore the need for targeted strategies to reduce GHG emissions and mitigate their environmental impact in high-density urban environments like L Ward. Implementing effective mitigation measures, such as enhancing energy efficiency, promoting sustainable transportation, and improving waste management, is crucial for reducing emissions in rapidly urbanizing regions. These efforts are essential for meeting global climate goals, promoting sustainability, and ensuring the long-term health and liveability of urban areas as they continue to expand and develop.