[passwordisnt123]

If you already own the land, $40 million dollars can build you a pretty amazing custom-built mansion with all the highest end finishes to your heart's content.

I agree with what other people have said here. Knock the thing down and start fresh. The building has no historical significance beyond its address which wouldn't change anyways. It serves no state function. It's basically just a place to store the PM away for the night. If a $40 million mansion isn't enough for the PM, then we need to re-evaluate our priorities.