Rhode Island General Laws Title 23. Health and Safety § 23-27.3-117.1. Lot regulation

When a building or structure has been demolished or removed and no building operation has been projected or approved, the vacant lot shall be filled with nonorganic fill, graded and maintained in conformity with adjacent grades.  The lot shall be maintained free from the accumulation of rubbish and all other unsafe and hazardous conditions which endanger the health, safety, and welfare of the public;  provisions shall be made to prevent the accumulation of water or damage to any foundations on the premises or the adjoining property;  and necessary retaining walls and fences shall be erected in accordance with the provisions of this chapter.