To avoid undue hardship, nothing in this chapter shall require a change in the plans, construction or designated use of any building or structure; provided that:
(A) A zoning permit has been issued within 60 days prior to the adoption of this chapter;
(B) The construction of which shall have commenced within 30 days after the adoption of this chapter;
(C) The construction is continuous until the building or structure is completed; and
(D) Actual construction is defined to include the placing of construction materials in permanent position; except where demolition or removal of an existing building or structure has commenced preparatory to construction, the demolition or removal shall be deemed to be actual construction; provided that, work shall be diligently carried on until completion of the building or structure involved.
(2001 Code, § 11.13)