Are bees allowed? Yes, as there is no code prohibiting honey bees. (No citation)
If a nuisance was called: Conditions would need to meet definition of “Nuisance,” quoted below or visit full section at http://library.amlegal.com/nxt/gateway.dll/Iowa/denison_ia/codeofordinancesofthecityofdenisoniowa?f=templates$fn=default.htm$3.0$vid=amlegal:denison_ia
50.01 DEFINITION OF NUISANCE.
Whatever is injurious to health, indecent, or unreasonably offensive to the senses, or an obstruction to the free use of property so as essentially to interfere unreasonably with the comfortable enjoyment of life or property is a nuisance.
Additional notes: None
Title: Building Inspector