That would be the Old Wayne County Building. "The [Old Wayne County Building] is currently owned by a New York-based investment group that has remained largely quiet since purchasing it more than two years ago for $13.4 million. However, sources have said that construction and renovation work is expected to begin this month."

An interesting article in Crain's profiles the properties. The others are:
  • Former Kmart headquarters, Troy
  • Centerpointe Business Campus building, Pontiac
  • Former Federal-Mogul headquarters, Southfield
  • Ottawa Tower II, Pontiac

With 2.27 million square feet, the five represent 3 percent of the 74.64 million-square-foot regional office market.