The general rules are no more the 8 poultry of any kind and no roosters
The rules about coops are basically that they must be 10 feet from your house and your neighbors lot.
Rules can also depend on where live if you live somewhere where you share a yard or something then rules are probably different.
What I have also discovered is that while rules are the same they are enforced differently based on the neighborhood for example if you live in a nice or rich neighborhood etc (especially if it’s more in the city proper) you will not want to press the rules cause neighbors will likely complain but if you live in an area that is not as nice pourer etc laws won’t normally be enforced because people are less likely to complain.
I for example live in a pour neighborhood and have 14 birds and no one’s ever complained but I would never have pressed the rules like this when I lived in Columbia city
I also have a neighbor who while I’ve never seen his flock I’d guess he has 1 maybe 2 roosters I have another neighbor who free ranges a flock of 20+ ducks and chickens along with a half dozen roosters.
Here’s the link for the code:
https://www.seattle.gov/sdci/codes/common-code-questions/animal-codes
Hope this helps