Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Learn about the minimum NFIP regulations and FEMA’s guidance and policies on substantial improvement (SI) and substantial damage (SD). Topics covered include defining and determining SI and SD, post-disaster permitting, and more.