The Building Commission or its agent or agents shall inspect and examine any dwelling or building within the municipality which, upon complaint of any federal, state, or municipal official or employee, or upon complaint of any resident or citizen of the municipality, is alleged to constitute an unsafe building or structure as herein defined; provided, that any entrance upon premises for the purpose of making such inspection or examination shall be made in such a manner as to cause the least possible inconvenience to the persons in possession.