Here's ours--finished I only have the one pic, unfinished I have the other angles. Our stairs are a U-shape and the ceiling clearance is 6' under the landing at the back of the stairs. My DM has a similar set up but her area under the landing has 5' ceiling clearance.

Same view as above only unfinished:

Area under the landing. I took this shot from the back right corner of the pantry shown in the photo above, so these are the shelves along the back wall (on the right in the photo) and then around the corner on the left side under the landing (straight ahead in the photo):

Broom area created under lower stair section (around corner again from last pic--this wall is opposite the back wall and extends under 1 or 2 steps on the lower staircase-not the greatest shot)

Hope this helps!