Blog · October 14, 2026 · Louisiana
Reading the Opelousas Flood Zone Map for a parcel
The zone on FEMA's map affects insurance, building and resale near Grand Coteau.
Main page: St. Landry Parish, LA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Washington, pull up the Opelousas flood zone map: FEMA's zone label affects insurance, permits and resale. Covered here for Opelousas: the free FEMA tools, what each zone label means, when insurance is required and how to challenge a map that looks wrong.
Getting started with the Opelousas flood zone map
Flood zones come from FEMA's Flood Map Service Center: type an address near Sunset, then open the map view for that panel. A tract near Sunset without an address is still easy to locate: search the nearest road and click inside the land.
Getting to the right map
Begin with the St. Landry Parish parcel viewer; it maps each assessed parcel around Leonville and Port Barre. For acreage around Leonville, type a street address, an owner's name or a parcel number, and the viewer zooms to the match. Save the parcel ID before closing the panel; every office in the parish asks for it first.
Which office to call
If the acreage or value on a parcel near Port Barre looks off go to the Parish Assessor, which maintains the tax roll. Questions about what you can build around Arnaudville are for the local planning and health departments, town or parish, depending on location.
Beyond the mapped zones
Creeks and ditches near Washington may not have detailed mapping, so ask neighbors about past flooding. Marshy spots near Arnaudville can limit building too; check the National Wetlands Inventory mapper for a first look.
City limits and county records
Opelousas sits in St. Landry Parish, Louisiana, which means parcel data comes from the county. Opelousas is also the county seat, which puts the Clerk of Court close by. With a lot near Arnaudville, city or town hall handles things like zoning, permits and utilities within town limits, while the county keeps the tax map. Lots just outside the city limits out by Grand Coteau often follows county rules instead.
Legal descriptions in Louisiana
Louisiana is laid out under the Public Land Survey System, so rural legal descriptions near Washington cite section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though corrections make some sections near Arnaudville odd-sized. Copy the legal description from the record for the parcel near Leonville before you request a deed or survey.
Backing up the map with records
For anything that matters, request the recorded deed through the Clerk of Court; the parcel map near Washington only summarizes it. Long-held tracts in the parish can go back through a long string of deeds, so a title company can sort it out if money is changing hands.
What the zone letters mean
An AE label carries a published BFE, which plain A zones lack; that elevation drives building rules near Washington. For acreage around Grand Coteau, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
A word on accuracy
The acreage figure is an assessed number; just a licensed surveyor sets the real lines for a parcel near Washington. In and around Leonville, records update in batches, so a deed recorded last month can take weeks to appear.
Questions to ask before you buy
Ask the seller whether the home has flooded on the property near Arnaudville; getting a quote early avoids surprises.
Lining it up with the parcel map
FEMA's map shows zones but not ownership, so check the St. Landry Parish parcel viewer too to confirm you have the right parcel near Washington.
Getting your bearings
Opelousas holds the county offices, which is where the courthouse records live. Smaller places on the map include Washington, Leonville, Grand Coteau, and Port Barre, where town lots give way to larger tracts. About 81,464 people live in St. Landry Parish (Census estimate, 2023) across some 924 square miles. St. Landry Parish was formed in 1807, which matters when you trace an old farm's title. Landmarks such as Atchafalaya National Wildlife Refuge help you orient on the aerial around Sunset.
Insurance, lenders and building
For a structure inside an A or V zone and a federally regulated lender is involved, the lender will require flood insurance in communities in the NFIP, and that holds around Arnaudville too. Remodeling a house in a zone near Leonville often needs a floodplain permit; check with the parish or town building office early.
Opelousas: common questions
Will my lender require flood insurance near Leonville?
For most people, lenders generally require it for buildings near Sunset in a Special Flood Hazard Area when the loan is federally regulated or insured; elsewhere it's optional.
Is Zone X safe from flooding for land near Sunset?
Good question; X zones around Washington are lower risk, not no risk; many owners near Sunset buy coverage anyway.
What does Zone AE mean near Sunset?
Short answer: AE is a Special Flood Hazard Area with a published base flood elevation, so builders near Arnaudville design to that elevation.
Can I see flood zones on the St. Landry Parish parcel viewer?
Good question; a flood layer may appear in the St. Landry Parish parcel viewer layer list; confirm a lot near Leonville on FEMA's map either way.
What's the tax parcel number used for near Arnaudville?
Every office uses it to pull the same file for land near Arnaudville; you'll see it in the viewer and on tax statements.
Open the official St. Landry Parish, LA parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.