Per new code requirements, houses in coastal zones have to be built on piles, and above some pre-determined level. The structure is not at all dependant on the “pad” (which in this case appears to be only a non-structural slab. The first floors of coastal homes are generally only ued for garages, etc. All heating/cooling, etc. equipment is above grade by about 1 floor level, typically.
All renovations must meet these new requirements, too, in coastal zones.
Thanks!