This paper concentrates on the sustainable traditional
architecture and urban planning in hot-humid regions of Iran.  In a
vast country such as Iran with different climatic zones traditional
builders have presented series of logical solutions for human comfort. 
The aim of this paper is to demonstrate traditional architecture in hothumid
climate of Iran as a sample of sustainable architecture.  Iranian
traditional architecture has been able to response to environmental
problems for a long period of time.  Its features are based on climatic
factors, local construction materials of hot-humid regions and culture. 
This paper concludes that Iranian traditional architecture can be
addressed as a sustainable architecture.