Originally Posted by tadpole
Pretty constrained area to work with, especially for a waterfall. Possible, but could be tricky. I would recommend possibly a bubbler of come sort. Let's see what some of the other guys have to offer.
Is that a stamped concrete patio?
What space is available under the stairs?
I'm with Tadpole, just do a rock bubbler. That space is almost to small for a waterfall, and design wise it'll look out of place.