In recent years, the issue of energy consumption modeling techniques in the building sector has beenwidely considered by researchers and managers. Researches indicate that energy consumption in residential sector is one ofthe main parts of the total consumption. Moreover, the urban residence is supposed as a significant consumer of energy inevery country and therefore a focus for energy consumption efforts. For over increasing building energy consumptionthere can be some causes including : climate change, increase in household electricity load, fast-growing householdelectrical appliances, huge energy consumption of the buildings, and the lack of strict government supervision.Recently the issue of assigning different prices to different time-periods of energy consumption has been taken intoconsideration for energy prices of consumers’ bills. Therefore, in this paper a model for multi-prices and multi-periodssingle-type energy consumption in urban residential sector is presented; also an efficient heuristic method is provided forsolving the mentioned model. پرونده مقاله