The 16,000-square-foot mansion above was built in 1918 at the center of the 47.5-acre de Guigne estate down in Hillsborough, at the end of Glenbrook Drive.
In 2002, testimony in a divorce case estimated the value of the estate at between $15 million and $30 million. And in 2009, a proposal by Christian de Guigne IV to subdivide his estate and build 25 new homes upon the property, versus 10 new homes which the town’s general plan would appear to principally allow, was floated but never came to fruition.
Mr. de Guigne has just put the property on the market for $100 million but doesn’t plan to move, he plans to retain a life estate in the property, maintaining its exclusive use during his lifetime, a little like Lord Grantham. Mr. de Guigne is 75.
Full Disclosure: The listing agent for the de Guigne estate advertises on SocketSite but provided no compensation nor information for this post.