Oh, I missed the "fowl" part. My bad. What a hassle that ordinance is, and I'm sorry your friend has had so much trouble. I love dogs but they are much more of a nuisance to neighbors with their barking and people who walk them but don't clean up their poop, yet there's no permit or inspection required for those. Idk why some cities give people trouble about getting a few hens. Banning roosters in urban/suburban areas I understand, but hens are really not much bother to neighbors.
And no worries, I totally did something similar when I posted before. I saw that the Columbus website referenced a coop/run size regulation but I had so many tabs open that I couldn't remember where I saw it lol.