308 Rose Park sold on condition — of what?

The much admired home at 308 Rose Park Drive in Moore Park has apparently been sold conditionally. Some neighbors think there is a plan to rezone the property for two houses although no sign has been posted. The home was listed for $2,495,000 in September. It sits on a lot that is 68 feet wide.  No 308 Rose Park dates from the 1920s and is one of only a few architect designed homes on the street, all on the north side. Previous post.