Outside storage on any portion of a yard, outside of an enclosed structure, under a carport or covered patio or other projecting overhang, for more than seven (7) days is considered a violation. Some of the items considered outside storage include: building materials; furniture and appliances not designated for outdoor use; tools; and motor vehicle parts.
To view the actual code text, click on the link below. This takes you to the main page of the City's Code of Ordinances. Scroll to Chapter 56, Section 56-81, Subsection (q).