The limitation of energy resources and the remarkable growth of use them in Iran compare with universal average has doubled the necessary of optimizing energy consumption in this country. Considering that in recent years the housing and commercial sector has allocated the largest ratio (37%) of energy consumption to itself; design the optimum pattern is one of the appropriate strategies. One of the primary ways to minimize energy consumption in residential buildings is design based on environmental conditions. In the recent years, the Maskan Mehr complexes were built by approach of affordable and suitable houses for all people in Iran. In this research by simulation the prevalent models of Maskan Mehr residential complexes and analysis the level of energy consumption in them via Ecotect software, existing examples are classified. The diverse types of Maskan Mehr are analyzed in four fields: shadows and overshadowing, solar radiation, lighting access simulation and thermal analysis. Afterwards regarding existing methods for minimum energy in building such as building orientation, location of translucent layers and the thermal inertial of layers based on the materials having been used in the buildings, the optimum pattern of orientation has been described. In conclusion, the results show that the given pattern should have following features:•The lowest ratio of width to length along the North•Having the maximum level of south-facing walls•Design the most translucent layers in South, East, West and North side respectively•Materials: Walls:Reverse Brick Veneer, Floors: ConcFlr _ Suspended, Ceilings: Suspended Concrete, Windows: Double Glazed_ Alum Frame, Doors: Foam Core_ Plywood