I am having this done with plywood as stair risers, and gypsum board to make the store room below. Carpenter quoted RM2,800. At first, I thought it was expensive, but after reading this thread, maybe it's cheap!

To those who have done it, care to share some pics? And comments? fa-tin, did you cover it up in the end?

Hmmm. I guess it's more practical to have some sort of clever storage system, but then again, having a store room is practical too if you want to just dump stuff and boxes and things, although not so space efficient. It's down to personal preference I guess. For me, I want a clean look, so I just decided to box it up to look like it's cement wall.