But did you know that upper levels really don't count towards overall square footage. There is a little section on the main cavy cages site that says "Upper levels should not be counted in providing the minimum square footage. In fact, ramps used to provide access to the upper deck usually take away from downstairs exercise space and count against square footage."
With members who have multiple levels of the same size like your cage CCC, I don't find much of a problem with that. But for those members who want to put 3 pigs in a 2x3 with a 1x1 or 1x2 loft, that isn't big enough.
I now have a three story C&C with 4 sows, the main level is 3x4, the 2nd story is a 1x4 loft and the third story is a 1x2 loft. The 2nd story is a hay loft (1x2) and lounging area (1x2) and the 3rd story loft is the pellet station. I figure if the girls want pellets badly enough, they can get plenty of exercise to get to them. The main level is running and play space and has their litterbox, a hammock, a tunnel and three hidey houses.
I also have a 2x3 with one boar residing in it. And I have the pet playpen set up in my living room temporarily housing my newest addition, Boo. She will be out of quarantine in two weeks and will be intro'd to the other sows and live with them in the big cage.