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Ascension Parish, LA Environmental Rules: Flood Zones (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

FEMA flood zone rules in Ascension Parish, LA, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.

Key Facts

Enforcing official: Ascension Parish floodplain manager
Permit required: development permit, § 9.5-8
Governing flood maps: FIS/FIRM dated August 16, 2007
Maximum penalty: $500.00 fine or 6 months jail, per violation

FEMA Flood Zone Lookup

FEMA assigns every parcel in the U.S. a flood-hazard designation on its Flood Insurance Rate Maps (FIRMs). Zones starting with A or V are high-risk Special Flood Hazard Areas where federally backed mortgages require NFIP flood insurance. Zone X indicates moderate-to-minimal risk, where insurance is optional but often recommended. Your specific zone determines insurance cost, build elevation, and permit requirements in Ascension Parish, LA.

Zone	What it means	NFIP required?
A	High-risk flood area; 1% annual chance flood, no detailed analysis.	Yes
AE	High-risk; same as A but with established Base Flood Elevations.	Yes
AH	High-risk shallow flooding (1-3 ft), usually ponding.	Yes
AO	High-risk shallow flooding (1-3 ft) with sheet flow on sloping terrain.	Yes
V	High-risk coastal zone subject to wave action (no BFE).	Yes
VE	High-risk coastal zone with wave action and established BFEs.	Yes
X (shaded)	Moderate risk; between the 1% and 0.2% annual chance flood.	Recommended
X	Minimal risk; outside the 0.2% annual chance floodplain.	No

Look up Ascension Parish, LA on the FEMA flood map

FEMA maps update periodically; verify zone before buying flood insurance or building.

Summary

Any development in a special flood hazard area of unincorporated Ascension Parish needs a development permit under Chapter 9.5 of the parish code. Ascension Parish Code § 9.5-8 requires the permit, § 9.5-6 applies the chapter to every mapped special flood hazard area, and § 9.5-9 bars locating, altering or changing the use of any structure or land there without full compliance.

These county ordinances apply to unincorporated areas of Ascension Parish. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

This chapter shall apply to all areas of special flood hazard with the jurisdiction of Ascension Parish Council. ... A development permit shall be required to ensure conformance with the provisions of this chapter. ... No structure or land shall hereafter be located, altered, or have its use changed without full compliance with the terms of this chapter and other applicable regulations.

View official code

Full Breakdown

5, Flood Damage Prevention, was adopted under the parish council's authority to minimize flood losses delegated by La. S. 5-1. 5-7. 5-9 makes compliance mandatory before any structure or land in a mapped flood hazard area is located, altered, or has its use changed. 5-21, reviewing permit applications to confirm building sites will be reasonably safe from flooding, coordinating watercourse-alteration notices to the state and adjoining communities, and maintaining records open for public inspection. 5-23 must show the elevation of the lowest floor, any nonresidential floodproofing elevation, and how the project affects natural drainage, and approval weighs factors like danger to life and property, effect on flood heights, and compatibility with the parish's comprehensive plan. 5-33 applies to subdivision and manufactured home park proposals, requiring base flood elevation data for any project over 50 lots or five acres.

Violations & Fines

Building, locating, extending, converting or altering a structure or land in a mapped special flood hazard area without a section 9.5-8 development permit is a misdemeanor under section 9.5-35, punishable by a fine of up to $500.00 or imprisonment up to six months, or both, for each violation, plus the costs of the case. The parish can pursue any other lawful action to prevent or remedy the violation on top of that penalty.

Frequently Asked Questions

Do I need a permit to build in a flood zone in Ascension Parish?

Yes. Section 9.5-8 requires a development permit for any development in a mapped special flood hazard area, and § 9.5-9 bars locating, altering or changing the use of land or a structure there without full compliance.

Who administers flood development permits in Ascension Parish?

The parish's floodplain manager, appointed under § 9.5-21, reviews applications, confirms proposed sites are reasonably safe from flooding, and coordinates required notices to state and federal agencies.

What's the penalty for building in a flood zone without a permit?

Section 9.5-35 makes it a misdemeanor: a fine of up to $500.00, imprisonment up to six months, or both, for each violation, plus case costs.

Sources & Official References

[1]Ascension Parish Code of Ordinances (Municode)

Other rules in Ascension Parish

Fence Regulations: Height LimitsLight Restrictions Erosion ControlSome Restrictions Stormwater ManagementSignificant Restrictions Flood Elevation RequirementsSome Restrictions Noise Ordinances: Barking DogsSome Restrictions Parking Rules: Driveway RulesSome Restrictions Parking Rules: Commercial & Oversized VehiclesSome Restrictions Fence Regulations: Fence Permit RequirementsSome Restrictions Fence Regulations: Material RestrictionsSome Restrictions

All Ascension Parish rules

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