Rates tend to be on the greater side of that array for two-story residences. Including an extension to a residence will certainly add much necessary room and also might enhance the worth of your residence. However, the price to develop an enhancement will certainly vary greatly relying on the size and extent of the task. According to Thumbtack.com, the typical expense for a house enhancement is around $25,000, with the reduced end costing $10,000, as well as the high-end coming in at $80,000.