Lake County, FL Hurricane Preparedness: Flood Elevation (2026)
Key Facts
- Standard freeboard
- Base flood elevation plus 18 inches
- Coastal A Zones
- Base flood elevation plus 1 foot
- AO Zones
- FIRM depth number or 2 ft minimum
- Design standard
- ASCE 7 Chapter 5 and ASCE 24
- Elevation certification
- Due before vertical framing continues
- Variance path
- Board of Adjustment, LDR § 14.15.03
Summary
New construction and substantial improvements in Lake County's flood hazard areas must meet elevation and design standards under FBC § 1612.4 and § R322.2.1, as locally amended by Code § 6-22(j)-(k). Lowest floors must sit at or above the base flood elevation plus 18 inches, certified before vertical framing continues.
R322.2.1 Elevation requirements. 1. Buildings and structures in flood hazard areas not designated as Coastal A Zones shall have the lowest floors elevated to or above the base flood elevation, plus eighteen (18) inches or the design flood elevation, whichever is higher. 2. Buildings and structures in flood hazard areas designated as Coastal A Zones shall have the lowest floors elevated to or above the base flood elevation plus one (1) foot (three hundred five (305) mm), or to the design flood elevation, whichever is higher. 3. In areas of shallow flooding (AO Zones), buildings and structures shall have the lowest floor (including basement) elevated at least as high above the highest adjacent grade as the depth number specified in feet on the FIRM, or at least two (2) feet (six hundred ten (610) mm) if a depth number is not specified. 4. Basement floors that are below grade on all sides shall be elevated to or above the base flood elevation, plus eighteen (18) inches or the design flood elevation, whichever is higher.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 150).
Full Breakdown
1 (§ 6-22(j)) so that buildings and structures in flood hazard areas outside Coastal A Zones must have their lowest floors, including basement floors below grade on all sides, elevated to or above the base flood elevation plus 18 inches, or the design flood elevation, whichever is higher; in Coastal A Zones the freeboard drops to 1 foot above base flood elevation, and in shallow-flooding AO Zones, the lowest floor must sit above the highest adjacent grade by the FIRM's depth number, or at least 2 feet if none is specified.
4 to require that buildings in flood hazard areas, including areas subject to high-velocity wave action, be designed and built to ASCE 7 Chapter 5 and ASCE 24, and that utilities and attendant mechanical, plumbing and electrical equipment be elevated at least 18 inches above the base flood elevation or higher if ASCE 7 or ASCE 24 demands it. Compliance is checked twice during construction. 1 then requires flood hazard documentation again before the final inspection and before a certificate of occupancy issues. 03.
Violations & Fines
Building below the required elevation, or skipping the lowest-floor elevation certification required under § 6-22(h) (FBC § 110.3.3) before framing continues, blocks approval to proceed and, ultimately, the final inspection and certificate of occupancy under § 110.3.11.1. The Building Official coordinates with the Floodplain Administrator on any request to modify the strict elevation standards, and unauthorized construction below the base flood elevation is treated as a code violation subject to correction orders.
Frequently Asked Questions
How high above flood level must my new home's floor sit?
When do I have to prove my floor elevation to the county?
What standard governs how flood-zone buildings must be built?
Sources & Official References
Other rules in Lake County
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