From what I can gather, you have a bulkhead that when the doors are open, it would hit against the bottom of the deck.
I would also tend to believe the back door is on the far side of the bulkhead.
If this is so, you will probably have two choices, build to it or build around it. If you build around it, you will have to go out far enough to be able to build a ramp down to it from the deck with railings. You would have to walk around the end of the ramp to get to the stairs to the drive way.
Like the rest have said, it's hard telling, not knowing!