When restoration allowed.
A nonconforming structure destroyed or damaged by fire, flood, wind, earthquake, explosion or other casualty, or by the public enemy, to the extent where the cost of restoration would amount to less than fifty percent (50%) of its assessed value may be restored. If the damage is in excess of fifty percent (50%) of its value or restoration is not started within a period of one (1) year and carried diligently to completion, application for restoration shall be made to the zoning board of adjustment to permit such restoration. Homeowners, as shown by the city tax records on the effective date of this article, shall be able to restore their property regardless of the extent of destruction, without making application to the city council. However, said restoration shall comply with all construction codes then in effect within the city.