Being in a flood plain is a mandatory disclosure and requires additional flood insurance. So they probably realized it when they went to get homeowners insuranc

Being in a flood plain is a mandatory disclosure and requires additional flood insurance. So they probably realized it when they went to get homeowners insurance and it was much more expensive than they thought it would be. On the flip side, the person that we bought our house from had the map showing the flood plains as part of the overview of the house and that the house that was outside of the flood plain. She was adamant about it because the house is up on a slight hill, so both neighbors are in the flood plain and had to fight insurance before that the house was not actually in the flood plain.