The Building Integrated PhotoVoltaic (BIPV) technology is the most promising technology to fulfill the requirements of sustainability, decentralized production and security of supply in the urban areas. The BIPV be analyzed according the present population, built up area respectively area which can be utilized and the electricity demand of three different cities. What can be the potential now and what can be feasible up to now with the BIPV, what is possible up to 2030 with BIPV in the urban areas, and what can be the share regarding the electricity demand. Considered are the cities Berlin, Barcelona and Vienna, interesting due to different supporting schemes, different irradiation and variable urban structure. Analyzed will be the present state of each city, with case studies, the population development and the development of the useful area for the BIPV. The utilized area is distinguished between roof- and façade systems. According already existing studies about the determination of the potential outgoing from the ground area, the potential of the cities are calculated. The result of BIPV potential up to now varies from 21% for Vienna up to 44% for Berlin and 46% for Barcelona regarding their electricity consumption. The potential related to the consumption in 2030 are decreasing for Vienna marginally down to 20%, for Barcelona down to 36% and for Berlin down to 36%. Using the present appropriate areas of the cities is a crucial point for the BIPV potential. The development of the population has more likely a marginally effect for the potential. The municipalities keep in mind a sustainable land use, which is not quite good for new BIPV potentials. Nevertheless for new buildings and in case of renovation, BIPV should be always considered. About 10% of BIPV potential can be gained from the new buildings up to 2030.