Meanings of little outbuilding in English

It is a strange little outbuilding that doesn't appear on the estate's original plans.

My little outbuilding is nestled among ancient magnolias.

My little outbuilding is called the "Annex." Annex to what?

Harry's red Corvette was there, where he always left it, in the little outbuilding that he used as a garage.

Probably just some stupid country kid trying to figure out what kind of animal the crazy old Shackleford family kept locked in that little outbuilding.

"Why bother with a piddling little outbuilding that does no real damage?"

They were strolling past a large farmhouse that stood like a hen among chicks in a crowd of little outbuildings.