$500 million for the Spaceship. $180 million for the Steve Jobs Theater. $15 million for the photovoltaic donut.
Click to enlarge. Lots more detail here.
My take: These estimates are minimums. I suspect the final cost will turn out to be considerably more than $5 billion.
Fun fact: According to the World Atlas, Apple Campus 2 is the world’s 4th most expensive building. No. 1 is Mecca’s Abraj Al Bait (below) at $15 billion.