We recently had a sort-of similar post on the EAp2 forum.
I would agree that you can't earn anything other than a warm fuzzy feeling for this, and not just because the renovation isn't going for LEED, but because as you point out this kind of benefit is tricky to document. Also, there are numerous ways in which LEED already covers energy efficiency, waste prevention, and rewards renovations, so you do get the LEED benefit, just not in the way you're hoping for.