If I am admitted for Fall transfer 2016. Can I begin by taking courses in Summer 2016?

I am interested in starting early during summer.

Hypothetically, if transfer decisions are released in April for fall admission, and I get happen to be accepted, do I have the option of enrolling for summer courses? Or do I have to wait until Fall to officially be a student before enrolling in summer courses?

Yes, just clear it with Berkeley.

Yep. I did that as a Fall 15 admit. Transfer edge is a good way to get into any class you want. I took two major requirements during the summer. Inform your admissions officer/advisor of your decision before you do so. Transfer edge makes enrollment easy, but keep on top of Financial Aid. If you take 6+ units over Summer, they will cover all of your tuition. Anything less, and you may have to pay out of pocket. I took 8.