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Public Works-Floodplain Management
Substantial Improvement/Substantial Damage Requirements  

 The NFIP requires that if the cost of reconstruction, rehabilitation, addition or other improvements to a building equals or exceeds 50% of the building's market value, then the building must meet the same construction requirements as a new building. Substantially damaged buildings must be brought up to the same standards (e.g., a residence damaged so that the cost of repairs equals or exceeds 50% of the building's value before it was damaged must be elevated above the base flood elevation).

For more information download NFIP Substantial Improvements & Substantial Damage Requirements and Definition.

Biggert Waters 2012 Website 


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