Renewable energy sources in the sustainble architecture

. In regards to the significant importance of this research, approximately 20–40 percent of the entire energy consumption in developed countries refers to the energy usage of buildings . It is believed that 21st century cities must be greener and smarter; hence, promoting sustainable cities has become a key issue for many developing countries . The benefits of renewable energy includes:environmental benefits, jobs and the economy, energy security and Energy for next generations (Sustainability) . In this study we introduced the renewable energy sources and their properties.This study clearly illustrated their discriptions and their benefits.After that it compared them from the prospectives of feasible use in urban areas and buildings, the amount of fossil fuel consumption reduction, the amount of initial construction costs enhancement , The amount of maintenance and operation cost reduction , the cost of production energy , The growth during two last decades ,cost of electricity generation ,most used in contemporary architecture ,growth of electricity generation technologies , growth of electricity generation technologies , government support and public awareness .Finally solar pv achieved best score and wind energy earned second place . The renewable energy sources include: wind energy, passive solar, active solar, geothermal energy and fuel cell each of them have their own properties and choosing of them is related to the conditions of the design