Is "core buildup with pins" typically included in the cost of the crown ($1500 cost) or is it an additional expense?

Not all crowns need a core build up, so when they ARE needed, it is an additional fee.  Some build ups need pins, some do not.  Each case is unique.

Hi:
Good question.  Normally core build up that requires post or pins is an additional charge.
Best,
Dr. Maddahi

Not all crowns need a core buildup. When they do, it's a separate procedure from the crown and there typically is an additional fee associated with it.