m rajabi - PhD Researcher, Department of Civil & Construction Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
m alborzi - Graduate student, Department of Civil & Construction Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
m ghane - Graduate student, Department of Civil & Construction Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran
j majrouhi sardroud - Assistant Professor, Department of Civil & Construction Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

Green buildings are one of the key strategies to reduce environmental pollution and create a healthier environment inside and outside of buildings and generally, the materials used are harmless. Green buildings provide optimal utilization of valuable energy sources such as wind, water, sun and etc. Today the costs of implementation of green buildings are one of the challenges matters in several countries and this research will help to find a suitable answer for the following questions. Are green buildings more expensive than conventional buildings or not And if the answer is yes how much is the increase in costs And what benefits can we achieve And is the implementation of green buildings is economically feasible This study has reviewed the results of recently published literatures about comparing the costs and benefits of green and conventional buildings. According to the results in more than 90% of studies, incremental cost of green buildings is more than conventional buildings and less than 10% of them, there aren’t significant cost differences between green and conventional buildings. About benefits of green buildings, despite the reduction from 25 up 60% in energy consumption unfortunately there isn’t considerable support from investors and contractors by governments

green buildings, energy consumption, incremental cost, incremental benefit