Simulation tools must be employed in order to depict the present situation around the external areas and inside the building envelope, usually during the warmest or the coldest day. If a new configuration of materials and bioclimatic techniques as water surfaces and green roofs are used in the outer space, this would also improve the energy consumption of the inner spaces of the urban complex. Whole building energy simulation in building complexes, before and after the outer space bioclimatic reformation, would show energy consumption reduction. The latter concept is applied in order to investigate the case of increased temperatures due to climate change. Whole building energy simulation software for quite large spaces has been utilized that takes into account detailed construction elements and local climatic conditions. This paper investigates exact strategies and practices that building developments should follow in the future in relation to climatic change.