FEMA Substantially Improved/Substantially Damaged Desk Reference (2010)
. Local floodplain management regulations and codes contain minimum NFIP requirements that apply not only to new structures, but also to existing structures which are “substantially improved (SI)” or “substantially damaged (SD).” This Desk Reference provides practical guidance and suggested procedures to implement the NFIP requirements for SI/SD.
FEMA P-784, SUBSTANTIAL DAMAGE Estimator (SDE) Tool
Substantial Damage Estimator (SDE) Tool (2017). FEMA developed the SDE tool to assist State and local officials in estimating Substantial Damage for residential and non-residential structures in accordance with the requirements of the NFIP. The tool can be used to assess flood, wind, wildfire, seismic, and other forms of damage.