Also, the factory walls are a grand idea along with some smaller utilitarian buildings
cheers
James
Amongst small utilitarian buildings you mention, perhaps a lower version of the back yards? This would allow the use of the outhouse with a half height door and the lower wall with a gate as an animal pen ~ ideally a pig stye of course for The Empress. Chicken coop comes to mind too.
When I were a lad, as they say, in the 1950's we lived in a row of Victorian terraces and at least three neighbours kept chickens out the back and one had kept a pig into the early 1950's I recall. Just a thought.