The house should be lifted high enough to allow for at least one foot of freeboard between the top of the water and the bottom of the structure. Based on the highest recorded past flood (1996) when water rose two feet above the 100 year-year design elevation, the minimum the house should be lifted is 6.5 feet. We assume that the flood waters are capable of rising over the 1996 amount, so nine feet was determined to be a safe height. The schematic design stage should further validate this assumption.