How expensive is it, and is it worth it to have a raised slab on a large building that is built on the coast to avoid flooding?
Vague question I know, but in general, what are the thoughts behind doing this for businesses and large condominiums that are looking to build on the coast lines where there is a higher risk of flooding?  Are there good examples of this?

It may not be a ‘slab’ exactly, but some way to have the building raised by a few feet above the natural sea level of the location
[{"id": "et5s4yt", "text": "I\u2019m NJ it\u2019s mandated by the Department of Environmental Protection. All new construction habitable space needs to be above the base flood elevation. \n\nIn regards to cost it\u2019s highly variable. A lot of construction in flood prone areas are built on piles around here. I saw a guy leave his high instead of cutting them off. The incremental cost is effectively zero.", "replies": [], "depth": 1}]