Why is there such a gap in the quality of barracks housing, even within the same BDE?

I have been with my unit for about 3 years. During that time we have been housed in 4 separate barracks buildings. And each one has been different. Different layout, different square footage, even different amenities. Also, having been tasked out to the FSBP for red cycle tasking, I have seen a few other barracks on post. Here's a prime example of what I'm talking about: my barracks is two per room. Open room, small closet, and only "cookware" is microwave and a fridge. Other barracks I have seen Soldiers have a common area almost as big as my whole room, a spacious private room, full kitchenette, and washer and dryer. I am curious as to what the reason is behind such a huge gap in the quality of the barracks, even within the same post or even BDE.