Well...for starters he lives in N.O. so he must be an expert on Katrina re-builing and hurricanes. Maybe he is looking to be head of FEMA.
I know you're kidding...but, my 7 year old daughter lives in a house, does that make her an architect?
Incidentally, I understand Pitt also fancies himself an architect of sorts. Not doubt he's used the same logic to get there.