An addition is an improvement that increases the square footage of a structures. These include lateral additions added to the side or rear of a structure, vertical additions added on top of a structure and enclosures added underneath a structure. NFIP regulations for new construction apply to an addition that is considered to be a substantial improvement to a structure. Some states and communities require that all additions, regardless of their size, meet those requirements.
National Flood Insurance Program Requirements
- 59.1 - Definition
- 60.3 - Flood plain management criteria for flood-prone areas
- (a) (1) - Development Permit
- (a) (3) - Reasonably Safe From Flooding
- (c) (2) - A Zone Residential Buildings
- (c) (3) - A Zone Nonresidential Buildings
- (c) (5) - Openings