Florida swampland that was built up with concrete 70+ years ago

[Charles Terrizzi]

It was covered with tons of dirt also. It's a half acre in a good neighborhood. I desire to build a house on the property, but the concern has been raised that the land may not be stable over the long haul. The property rarely has any standing water and has no sinkholes. This info is from the neighbors who all have houses near the property. Any swamp rehab exerts here? Before you just patently say this is s bad idea, remember my entire state is a former swamp and most of us are very close to sea level here.