A building or structure or part or appurtenance thereof or a construction condition found to be hazardous to life, limb, or health, upon order of the building commissioner or enacting authority, shall be corrected, replaced, repaired, vacated, demolished, or removed and the premises or work restored to or put in a safe condition within a reasonable period of time, as may be appropriate in each case, when such a finding has been made in writing, written notice of the findings and order have been given the owner or his agent or the contractor, and except in emergencies, a hearing on the order has been held before the building commissioner. (Ord. 60-09, 5-12-1960)