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28 <br />9. Additions /Improvements. <br />a. Additions and/or improvements to pre -FIRM structures whereas the addition and/or <br />improvements in combination with any interior modifications to the existing structure <br />are: <br />i. Not a substantial improvement as defined and does not require a zoning or building <br />permit, the addition and/or improvements shall be designed to minimize flood <br />damages and shall not be any more non - conforming than the existing structure. <br />ii. Substantial improvement as defined requiring a zoning or building permit, both the <br />existing structure and the addition and/or improvements shall comply with the <br />standards for new construction. <br />b. Additions to post -FIRM structures with no modifications to the existing structure shall <br />require only the addition to comply with the standards for new construction. <br />c. Additions and/or improvements to post -FIRM structures whereas the addition and/or <br />improvements in combination with any interior modifications to the existing structure <br />are: <br />i. Not a substantial improvement, the addition and/or improvements only must comply <br />with the standards for new construction; and, <br />ii. A substantial improvement, both the existing structure and the addition and/or <br />improvements must comply with the standards for new construction. <br />d. Where a fire wall or independent perimeter load - bearing wall is provided between the <br />addition and the existing building, the addition(s) shall be considered a separate building <br />and only the addition need comply with the standards for new construction. <br />(Ord. of 8 -28 -1995, § 5.2, eff. 8 -28 -1995, Ord. of 10 -03 -2005, eff. 10 -03 -2005) <br />Sec 42 -93. Specific Standards for floodplains without established base now elevations <br />(Approximate Zone A). <br />Within the SFHAs established in Section 42 -37 are where no base flood data has been <br />provided the following provisions shall apply: <br />1. No encroachments, including fill, new construction, substantial improvements or new <br />development shall be permitted within a distance of fifty (50) feet each side from top of bank <br />or five times the width of the stream whichever is greater, unless certification with <br />supporting technical data by a North Carolina licensed Professional Engineer is provided <br />demonstrating that such encroachments shall not result in any increase in flood levels during <br />the occurrence of the base flood discharge. <br />