We built this house for elderly parents. By design, the house is simple and consists of light blocks (aerated concrete). The total area of the house is 640 square feet and the exterior dimensions are 18 by 22 feet. We built this house without loans and on a small budget of $17,000. This cost also included the purchase of a piece of land for $2,000. The total budget did not include the cost of workers, since we did all the work ourselves.