I am a host in Sandy, UT. Currently there are no ordances regarding short term rentals here. But there is a public meeting to discuss them at Sandy City Hall, on Aug. 21, @ 7pm. I've looked at the planning committee's notes on STR's (short term rentals) and the proposed amendments look very restrictive. If you want to look them up go to http://sandyutah.legistar.com/Calendar.aspx
Search STR notes and you will find the proposed amendments. It appears that the city is very concerned about the proliferation of STR's and are therefore proposing inspections, heavy fines for any "violations", breaks between bookings of 3 days, the posting of the hosts name, phone # and contact info on the outside of your front door, two tiered permit process, etc. Encourage all hosts in the UT area to go to this meeting.