I would say that it's probably all of the above. It really depends on the units that you're looking at.
I was talking to a friend of mine who left the army reserve and went to the navy. He was telling me about homes that are in his community of PMQs that are unoccupied. Some are falling apart and some are mid-renovation, and there has been a series of renovators going in and not finishing the work. It's all of the above.