This thesis examines how urban morphology shapes spatially differentiated carbon regimes in New York City and what these patterns mean for low-carbon planning and environmental justice. Using building benchmarking data, morphology indicators, environmental variables, and socioeconomic data, it develops a neighborhood-scale framework linking urban form, energy use intensity (EUI), carbon emissions, and community sensitivity. Spatial statistics and regression analysis show that building-related carbon emissions are unevenly distributed and strongly associated with development intensity, impervious surfaces, land-use concentration, and social vulnerability. EUI acts as an important mediating mechanism, but carbon burden is also shaped by broader spatial and social conditions. By combining carbon patterns with neighborhood sensitivity, the study identifies distinct planning challenges across the city. It argues that low-carbon planning should move beyond uniform standards toward spatially differentiated strategies that integrate decarbonization, heat-risk reduction, and environmental equity.