Who is covered
New construction in FEMA Special Flood Hazard Areas.
What the law requires
- Determine the required freeboard for your occupancy and flood zone.
- Design the finished floor elevation to meet BFE + required freeboard.
- Obtain a post-construction Elevation Certificate confirming built elevations.
Filing frequency and deadlines
Penalty structure
Non-compliance with LL43 (2021) can result in the following penalties:
- DOB will not approve construction documents for non-compliant flood zone construction.
Exemptions
- Buildings outside SFHA.
- Existing buildings not undergoing substantial improvement.
Recent updates and amendments
LL43 freeboard values align with ASCE 24-14 standards; DOB updated guidance in 2023.
Reference
Official source: NYC DOB — Flood Resilience
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