Mark Zuckerberg and Priscilla Chan have sold one of their San Francisco homes for $31 million in an off-market deal, a spokesperson for the family confirmed. The deal marks the most expensive sale in San Francisco so far this year, according to Zilllow. Built in 1928, the 7,386-square-foot home has four bedrooms and four bathrooms, and is on the edge of the Mission District and Dolores Heights neighborhoods of the city. The sale closed on July 1, but records of the transaction have just become publicly available.