The Utilities Superintendent and other duly authorized employees of the city, upon proper identification, are authorized, with the permission of the licensee, owner, resident or other person in control of property within the city, to enter upon all properties for the purpose of inspections, observation and testing in accordance with the provisions of this chapter. If the licensee, owner, resident or other person in control of property within the city does not permit the entrance to the property, the city may obtain an administrative search warrant as provided for in § 10.20.