The home values used in this article are taken from 2011 real-property tax assessments and were compiled by Metropolitan Regional Information Systems. When possible, we combined contiguous properties owned by the same person. Some owners are identified not as individuals but as LLCs. LLC stands for limited-liability company and can be used in homebuying to shield the purchaser from potential liability or to maintain an owner’s anonymity. Some sales information and house details were provided by Diana Hart of TTR Sotheby’s International Realty.