Impossible to tell you anything from the very limited info you offered. Even then it may be impossible to offer anything other than a wild guess. This is something you would need someone onsite to look at.

Why do you want to build your basement two feet above grade and then add fill material, presumably to make it look as if the basement was not above grade?

If it is above grade isn't it then just a room rather than a basement?

Sounds like a question for your architect so they can ask you if you mean the ceiling or the floor of the basement is "just 2 ft above grade" and other clarifications.

I have no idea what you want to do.

What 'looks good' to you?

Has the OP left the building?