R322.2.1 Elevation requirements.
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i.
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Buildings and structures in flood hazard areas, including flood
hazard areas designated as Coastal A Zones, shall have the lowest
floors elevated to or above the base flood elevation plus two feet,
or the design flood elevation, whichever is higher.
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ii.
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In areas of shallow flooding (AO Zones), buildings and structures
shall have the lowest floor (including basement) elevated to a height
above the highest adjacent grade of not less than the depth number
specified in feet (mm) on the FIRM plus two feet, or not less than
four feet, if a depth number is not specified.
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iii.
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Basement floors that are below grade on all sides shall be elevated
to or above base flood elevation plus two feet, or the design flood
elevation, whichever is higher.
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Exception: Enclosed areas below the design flood elevation,
including basements with floors that are not below grade on all sides,
shall meet the requirements of Section 322.2.2.
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R322.2.2 Elevation requirements.
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i.
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Buildings and structures erected within coastal high-hazard
areas and Coastal A Zones shall be elevated so that the bottom of
the lowest horizontal structure members supporting the lowest floor,
with the exception of pilings, pile caps, columns, grade beams and
bracing, is elevated to or above the base flood elevation plus two
feet or the design flood elevation, whichever is higher.
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ii.
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Basement floors that are below grade on all sides are prohibited.
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iii.
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The use of fill for structural support is prohibited.
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iv.
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Minor grading, and the placement of minor quantities of fill,
shall be permitted for landscaping and for drainage purposes under
and around buildings and for support of parking slabs, pool decks,
patios, and walkways.
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v.
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Walls and partitions enclosing areas below the design flood
elevation shall meet the requirements of Sections R322.3.4 and R322.3.5.
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i.
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Any project for improvement of a building required to correct
existing health, sanitary, or safety code violations identified by
the Chief Building Official and that are the minimum necessary to
assure safe living conditions.
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ii.
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Any alteration of an historic structure, provided the alteration
will not preclude the structure's continued designation as an
historic structure.
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1612.4.2 Elevation requirements. The minimum elevation
requirements shall be as specified in ASCE 24 or the base flood elevation
plus two feet (610 mm), whichever is higher.
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i.
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Any project for improvement of a building required to correct
existing health, sanitary, or safety code violations identified by
the Chief Building Official and that are the minimum necessary to
assure safe living conditions.
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ii.
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Any alteration of an historic structure, provided the alteration
will not preclude the structure's continued designation as an
historic structure.
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