second-homer

noun
  1. a person who owns another house in addition to their main home, often in an area where they are not native and used as a holiday home
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012