Is Charleston the most undervalued U.S. city for housing costs? So says a new analysis from Smart Asset ( As quoted in today’s Post and Courier, “We estimate, given the quality of life available in the Holy City, that home prices in the area should be around $294.40 per square foot. According to data from Zillow, homes can actually be bought for $106.75 per square foot, for a savings of $187.65 per square foot.” Take that San Francisco!