Florida Coastal High Hazard Area (CHHA) — Ch. 163.3178 (FL)
Tracked preemption from the Florida overlay bundle.
Overview
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Effective
2011-06-02
Sunset
—
Authority
state
Scope
state:FL
Other Florida preemptions
Florida Live Local Act — 2024 Amendments (SB 328)Florida Live Local Act — SB 102 (2023)Florida HB 1339 — Preemption for SAIL/SHIP-Funded Affordable HousingFlorida Short-Term Rental Preemption — Ch. 509.032Florida Building Code Preemption — §553.73Florida Bert J. Harris, Jr. Private Property Rights Protection Act — §70.001Florida Comprehensive Plan Consistency — Ch. 163.3180Florida Coastal Construction Control Line (CCCL) — Ch. 161
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
AND
city.is_coastal_chha_exposed==Trueparcel.geometrygeographic match
Preempted fields
2 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
review_type | require | chha_density_and_hurricane_evacuation_findings | Comprehensive plan amendments that increase residential density in the CHHA must demonstrate maintained hurricane evacuation clearance times or provide mitigation. |
base_districts[*].max_units_per_acre | cap_at | existing_plan_density_unless_mitigated | Density increases in the CHHA are constrained unless the jurisdiction adopts mitigation consistent with §163.3178(9). |
Citation
Authority source
Fla. Stat. §163.3178 (Coastal management) — CHHA defined at §163.3178(2)(h); density findings at §163.3178(9)
Research notes
CHHA = Category 1 SLOSH inundation zone per §163.3178(2)(h). Per-parcel geographic predicate. Tempers, rather than directly overrides, base-district density — the binding mechanism is the comprehensive-plan amendment process.