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Buildings are found to be both, one of the biggest consumer of energy and producer of greenhouse gases. And among them 60% building of Dhaka city are residential. It has become a global issue. According to the National Institute of Building Sciences, buildings generate 35 percent of the carbon dioxide (the primary greenhouse gas associated with climate change), 49 percent of the sulphur dioxide, and 25 percent of the nitrogen oxide found in the air. Since buildings are accountable for this scenario, it has imposed an immediate requirement to not only think of, but implement sustainability in every new construction instantly. This will render us a sustained environment and a healthy ecosystem. Green Buildings are buildings that subscribe to the principle of conscientious handling of natural resources, which means causing as little environmental interference as possible, using environment friendly materials, requires low operational energy, utilizes renewable sources of energy to fulfill its requirements, follows high-quality and longevity as a guideline for construction and last but not least, must be economically viable.. The paper focuses on green design as a vital transformation of contemporary architecture practiced in Dhaka city. It endeavours to present some environmental and physical design approaches for green buildings. In this regard, the study presents hands on analysis of basics and principles of green architecture, theories and viewpoints outlined in the field and also the analysis of efficacious cases of environment friendly buildings in Bangladesh.