Writers Roald Dahl and Philip Pullman used their old wooden garden sheds for creating world famous works of literature.
But I personally believe urban fantasy is anything involving mystical and fantastical beings who make our boring and plain world more exciting while being integrated in it. https://nerdzillaclassifiedscolumbusohio.nerdzilla.com/index.php?page=user&action=pub_profile&id=490700