When it is necessary to make an inspection to enforce the provisions of this chapter, or when the code official or housing inspector has reasonable cause to believe that there exists in a building or upon a premises a condition that is contrary to or in violation of this chapter, the code official or housing inspector may enter the building or premises at reasonable times to inspect or to perform the duties imposed by this chapter, provided that if such building or premises are occupied that credentials be presented to the occupant and entry requested. If such building or premises is unoccupied, the code official shall first make a reasonable effort to locate the owner or other person having charge or control of the building or premises and request entry. If entry is refused, the code official or housing inspector shall have recourse to the remedies provided by law to secure entry.