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The finished ground level of an under-floor space such as a crawl space shall not be located below the bottom of the footings. Where there is evidence that the ground-water table rises to within 6 inches (152 mm) of the ground level at the outside building perimeter, or that the surface water does not readily drain from the building site, the ground level of the under-floor space shall be as high as the outside finished ground level, unless an approved drainage system is provided. The provisions of Sections 1803.5.4, 1805.2, 1805.3 and 1805.4 shall not apply in this case.
1805.1.2.1 Flood Hazard Areas
For buildings and structures in flood hazard areas as established in Section 1612.3, the finished ground level of an under-floor space such as a crawl space shall be equal to or higher than the outside finished ground level on one side or more.
Exception: Under-floor spaces of Group R-3 buildings that meet the requirements of FEMA TB 11.

Related Code Sections

1805.1.2 Soils and Foundations, Under-Floor Space
The finished ground level of an under-floor space such as a crawl space shall not be located below the bottom of the footings. Where ...
1805.1.2 Soils and Foundations, Under-Floor Space
The finished ground level of an under-floor space such as a crawl space shall not be located below the bottom of the footings. Where ...