hamid reza arami, secretary of the civil and urban planning working group of the research center of thelis, the horizontal development of cities speeds up the construction process. also , since they are single owners, construction challenges will be minimized. according to the economic situation of the country, the higher the speed of construction, the more advantageous it is. because of this construction , it will not be involved in inflation. sohrab mashoudi, head of the group urbanization of the society of iranian consulting engineers. due to population growth in cities. building high-rise buildings is a natural and appropriate solution for housing people. but this issue does not apply in small cities, and the issue of vertical or horizontal construction development should be looked at in a specialized way. farshid ilati, housing expert. the implementation of the horizontal development plan of cities has an effective role in reducing housing construction costs, and on the other hand , it provides the basis for accelerating the housing construction process. the horizontal development