Zoning › State preemptions › Alabama

Alabama Flood Damage Prevention — NFIP Participation + ADEM Floodplain Coordination (AL)

Tracked preemption from the Alabama overlay bundle.

Overview

← All state preemptionsAlabama overlay roll-upAlabama zoning wikiAlabama building codesFederal overlaysGlossaryFederal-conflict: Yes
Effective
1968-08-01
Sunset
—
Authority
state_federal_joint
Scope
state:AL
Other Alabama preemptions
Alabama Short-Term Rentals — No State Preemption (April 2026)Alabama Density / ADU / Inclusionary Zoning / Design Review — No State PreemptionAlabama Black Belt National Heritage Area — Non-Regulatory Heritage DesignationAlabama Land Recycling & Economic Redevelopment Act — Voluntary Brownfield CleanupSelma to Montgomery National Historic Trail — NPS Viewshed Compatible-Use AdvisoryMobile Bay National Estuary Program — CCMP Coordination (Non-Regulatory)Alabama Group-Home Preemption — Multi-Family District InclusionAlabama Manufactured Housing — No Zoning Preemption (Title 40/24 govern taxation, installation)

Trigger predicate

When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.

city.in_femap_special_flood_hazard_area == True

Preempted fields

3 fields on the base district schema are rewritten when the trigger fires.

FieldOpValueNote
base_districts[*].requires_flood_damage_prevention_ordinanceoverrideTrueNFIP participation requires adoption of a flood damage prevention ordinance meeting 44 CFR §60.3 minimums; Alabama Office of Water Resources (within ADECA) serves as the state NFIP coordinating agency and distributes a model ordinance.
base_districts[*].min_lowest_floor_elevation_at_or_above_bfeoverrideTrueLowest floor of new residential construction in SFHA must be elevated at or above the Base Flood Elevation (BFE) per 44 CFR §60.3; many AL local ordinances add 1-2 ft freeboard (stricter local permitted).
base_districts[*].prohibits_increases_in_floodway_bfeoverrideTrue44 CFR §60.3(d)(3): no new construction, substantial improvement, or other development permitted in the regulatory floodway that would result in any increase in base-flood elevations.

Citation

Authority source
National Flood Insurance Act (42 U.S.C. §4001 et seq.); 44 CFR §60.3; Alabama Office of Water Resources (ADECA) state NFIP coordinator
§ 44 CFR §60.3; AL NFIP coordinating program
https://water.alabama.gov/floodplain-management/

Research notes

Hybrid federal/state. NFIP participation is technically voluntary at the community level, but loss of NFIP eligibility blocks federally backed mortgages in mapped SFHAs — effectively universal across AL cities with FEMA-mapped flood hazards. Alabama Office of Water Resources within the Alabama Department of Economic and Community Affairs (ADECA) is the state NFIP coordinator. Particularly relevant in the Mobile-Tensaw Delta, coastal Mobile/Baldwin counties, and along the Tennessee, Coosa, Alabama, Tombigbee, and Cahaba river systems.