Ditto the zoning and planning department. My new coop will be 8x12.
My county required permits even for small sheds. Anything larger than 120 sq feet requires plans and blueprints. :

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I don't MIND, but you certainly cannot tell me that every single farmer out here with a million little makeshift outbuildings has driven all the way into the city, paid for a meter, stood in line, filled out the paperwork, and slapped down $100 for a permit.
The almost giggled when I told him what I was building and was there for a permit, but said thank you for coming in to do it properly. I had my plans and sketches and photos ready and half the people in line perked up and wanted to see it.
I did a small addition the "right way". Last time.
After I got my permit, zoning office looked at google earth on my farm and came out and "inspected" the pasture because they saw used tires and junk out there.
Most of which I thought would be repurposed. some of it has been there for 80 years are more. Old horse equipment, tractor tires (not car). old feeders and scrap iron.
When I told the "kid" that came out most of that stuff has been there for 50 years or more, his response was "well, it should have been cleaned up years ago".
When he pointed to some iron and steel stuff and piles and said they had to go, I said "No, that is scrap iron I use for welding and making things".
His response was " well it has to be stacked neatly and put under cover then."
I then ended the tour by telling him without a search warrant he could not go any further. I told him to never return. ( so much for my diplomacy).
It is impossible to see any part of the pasture unless you are on my land or in the air.
I have checked and re checked the statutes I can see nothing that says one must keep their possessions neat and piled under cover.
The actual building inspector himself is a real nice guy, he seems to understand about farms and rural areas, we actually talk about birds when he stops by, his wife keeps them,
But I still find it amazing you need a blueprint, footings, and so forth in a chicken coop, or calf hut.