Permits are also required for most types of construction, including fences, decks, pools, outbuildings, as well as for many electrical, mechanical or plumbing work, including new lawn irrigation systems. Prior to commencing any such work, you should verify whether a permit is required first. Check with the City of Smithville before you start any project:
https://www.smithvillemo.org/pview.aspx?id=1943&catid=0