Deb, similar cinderblocks in use here. I'm just leveling with dirt now, but in reality, I should have dug a bit deeper and filled the bottom with gravel. That's a lot easier to level, you make it a bit too deep and then you fill with gravel. Easy to level that way. This thing might not be completely level, but I figure a 1cm tolerance in fine for it. "It's just a bunny hutch."