Addition

Definition/Description
NFIP Requirement
Other Applicable NFIP Regulations
Guidance
Related Keywords
Special Topic Resources

Definition/Description

An addition is an improvement that increase 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.

NFIP Requirement

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 Zones, Nonresidential Buildings
- (c) (5) - Openings

Other Applicable NFIP Regulations

60.3 - Flood plain management criteria for flood-prone areas
- (b) (4) - Available Data
- (b) (5) - Elevation Certificate
- (c) (4) - Floodproofing Certification
- (c) (7) - Zone AO Residential Buildings
- (c) (8) - Zone AO Nonresidential Buildings
- (c) (10) - Cumulative Effects of Development
- (d) (3) - Floodway Encroachment
- (e) (4) - V Zone Structures