empty houses; The remaining capacity on "housing for rent" land in Tehran, the continuous increase in housing rental costs and the decrease in the purchasing power of households have made the policy of implementing the "housing for rent" program one of the needs of the housing market; The Ministry of Roads and Urban Development took the first step in formulating this plan, and now the participation of the municipal management and the use of the capacity of empty units in Tehran can turn this policy into a broader plan to support tenants.