I live in the suburbs and I'm allowed to keep as many as I like, as long as the neighbours are not disturbed. So I've chosen to not keep a rooster (although there are a couple within earshot, which is handy if ever I want to put fertile eggs under a broody). I hope to gradually build up a flock of 8-12 hens with the old ones living out their days in peace.
Here in urban Honolulu, non-agricultural zoned properties may have up to two chickens. It is not enforced and there's a Facebook group that openly flouts the rules. One lady had the gall to say that her suburban neighbors are always complaining but she only has fifteen that are hers and only three are roosters. The rest are just ferals that she feeds and they come around for the food.
Ugh!!!
Sorry, I'm all for the fact that this big metropolis is trying to be considerate of those that want a sustainable lifestyle, but if you want more birds, do what I did -- raise quail. My birds don't wake everyone else up at 3 am and they don't free range in my neighbors' vegetable gardens. I also don't set my roosters loose in city parks for others to deal with.
We have some weird rules where we are outside of Atlanta. The town I live in has no restrictions, HOWEVER my address falls under the county regulations and that states that you may only have 6 adult birds (total, not per breed/species) per full acre and 1 adult livestock mammal per full acre. I am on 1.85ac and am only allowed to have 6 birds. So I have 2 geese, 9 bantam/light chickens and 8 ducks. I just focus on not bothering my neighbors and hope it’ll be fine. Definitely no peacocks or guineas for me though… yet…
I can have as many as can be properly housed and cared for without creating a health hazard or nuisance for the keeper or neighbors. Roosters are allowed but fall under the noise ordinance and nuisance rules. I choose to not keep one.