Each council differs in laws and regulations, so best check your individual council.
It will be bagged and painted, to match the house. It hasn't really cost me that much, since I haven't paid for any of the bricks or steel that has gone into it, just had to pay for the cement, gravel and sand so far. It's probably a little over the top, but I tend to do things that way, lol. The original idea was, that one day, when we sell the house, I will be able to strip the flights off the front ver easily, slip a sliding door in the front, and its automatically a workshop or storeroom, or even a bedroom for that matter. So it is very over engineered as a bird aviary, simply for that reason. But in the end, anyone can draw from this, but does not have to go with the whole brick base slab and brick walls, simply fibro walls or timber or iron would work just as well. The last time I built this design of aviary, it was timber stud walls with fibro (fc sheeting) cladding on the outside.