My Fiancée was adopted when he was 8 but now he has two last names. Before we get married he would like to drop his birth name and go by his adopted name. How long does this take and does anyone have a clue as to the cost?

What state do you live in?

I am living in VA, he is in CA

All right, this website lists steps required for changing your name in California.

California Courts: Self-Help Center: More Topics: How to Change Your Name or Your Gender: Changing the Name of an Adult: How do I Ask the Court to Change my Name?

I don't think it takes more than maybe a few months and it probably won't cost a terrible amount.