When any lot, or premises, building or structure within the city, because of age of dilapidation, the accumulation of refuse or debris, the uncontrolled growing of noxious weeds, or because of any other condition or happening becomes, in the opinion of the Council, a public nuisance or hazard which is dangerous to the health, safety, or welfare of the inhabitants of the city or of those residing or habitually going near such lot or premises, or such building, or structure, the Council may, after investigation, give notice to the owner or owners of the land upon which such nuisance or hazard exists or to the owner or occupant of the land or the building or structure itself, by posting notice upon the premises, by personal service, or by registered or certified mail addressed to the address set forth in the current assessment roll of the city, or the records of the Assessor, specifying the nature of the nuisance or hazard and requiring such owner or occupant to alter, repair, tear down, abate or remove the nuisance or hazard within a time to be specified by the Council which shall be commensurate with the nature of the nuisance or hazard. If, at the expiration of the time limit in said notice, the owner has not complied with the requirements thereof, or in any case where the owner of the land or of the building or structure itself is not known or cannot be found, the Council may order such nuisance or hazard to be abated by the proper department or agency of the city which is qualified to do the work required, or may do the work by contract or by hire, and the cost of such abatement may be assessed against the lot, premises, or description of real property upon which such nuisance or hazard is located, by special assessments which shall be due and payable at the direction of the Council.