A couple of weeks ago, on another blog, someone posted a picture on which a CM wrote the refurbished building. As of the end of April 2018, the refurbished sections are:
70-80-90 are all done
60: building 5 is done and building 4 just reopened.
50: building 3 is closed and building 1 is closed and starting next. Building 2 is is opened but not refurbished yet.
Hope that helps!