If your bank makes, increases, extends, or renews a loan secured by improved real estate or by a mobile home, it must use the standard flood hazard determination form (SFHDF)
developed by FEMA to determine whether the building or mobile home offered as security property is or will be located in an SFHA in which flood insurance is available under the Federal
flood insurance statutes. This needs to be done for each property/parcel you are taking as collateral that includes improved real estate or a mobile home.
I assume your bank has contracted with a vendor to make these determinations and that is your vetted process, so that is what you should follow for these parcels as well. The flood determination vendor is also likely to do life of loan moniroting which you would not have it you didn’t pull flood determinations through them.