Jefferson Davis Parish, LA zoning map, flood zone and property lines by address
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Towns in Jefferson Davis Parish: Jennings, Welsh, Lake Arthur.
Flood zone by address
ParcelSheet reads FEMA's National Flood Hazard Layer at the lot: the zone, whether it is a high risk area where lenders ask for flood insurance, and the base flood elevation where FEMA lists one. FEMA's parishwide study for Jefferson Davis Parish has 20 FIRM panels, the newest effective July 2010; coastal V zones, where waves add to the flood, are mapped along its shore.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for a Jefferson Davis house comes from a licensed surveyor and is often on file with the parish or city building office.
Property lines
The parcel outline, parcel number and mapped size come from the Louisiana parish parcel layers (each parish publishes its own), so a Jefferson Davis lot shows the same lines the parish assessor draws. Jefferson Davis Parish covers about 416,973 acres of land and 4,613 acres of water.
Mapped lines are approximate. The Jefferson Davis Parish assessor keeps the parcel record (Jefferson Davis Parish website); a licensed surveyor sets the true corners.
Zoning
Jefferson Davis Parish zones its unincorporated land, and Jennings, Welsh, Lake Arthur each zone the land inside their limits. ParcelSheet shows the use the parish assessor lists for the lot and links the parish planning and zoning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Louisiana's parish zoning law (Louisiana Revised Statutes 33:4780.40 and following), local governments can allow an accessory dwelling unit on a lot with a house. Whether a Jefferson Davis lot can add one depends on its district; the parish planning and zoning office has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Septic and soil
ParcelSheet reads the USDA soil survey at the lot: the soil's name, its septic absorption rating and whether it is prime farmland. Jefferson Davis Parish is soil survey area LA053, Jefferson Davis Parish, Louisiana, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Jefferson Davis Parish needs a permit from the Jefferson Davis Parish health unit sanitarian (Louisiana Department of Health onsite wastewater program).
Setbacks
Setbacks in Jefferson Davis Parish come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the parish zoning office gives them for the lot's district, and Jennings, Welsh, Lake Arthur for land inside their limits.
Hazards that apply
- Storm surge. Jefferson Davis Parish has coastal V zones on its FEMA map, so storm surge reaches its shore. The parish's evacuation zones are on its emergency management site; ParcelSheet shows the FEMA zone and the 3 ft sea level rise map at the lot.
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Jefferson Davis lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Jefferson Davis Parish?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA's parishwide flood map for Jefferson Davis Parish has 20 panels, the newest effective July 2010. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Jefferson Davis Parish?
Open the Louisiana map, type the address, and the parcel outline from the Jefferson Davis Parish assessor shows on the map with its parcel number and mapped size. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Jefferson Davis Parish?
Zoning in Jefferson Davis Parish is set by the parish for unincorporated land and by each city (such as Jennings, Welsh) inside its own limits. ParcelSheet shows the use code the parish assessor lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Jefferson Davis Parish?
Under Louisiana's parish zoning law (Louisiana Revised Statutes 33:4780.40 and following), parishes and cities can allow an accessory dwelling unit, and each sets its own rules. In Jefferson Davis Parish ask the zoning office for the lot's district first; ParcelSheet shows the lot size as mapped so you can see the room you have.
Do I need a septic permit in Jefferson Davis Parish?
Yes. A new or changed septic system in Jefferson Davis Parish needs a permit from the Jefferson Davis Parish health unit sanitarian (Louisiana Department of Health onsite wastewater program). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area LA053 (Jefferson Davis Parish, Louisiana).
What can I build on 5 acres in Jefferson Davis Parish?
Zoning in Jefferson Davis Parish is set by the parish for unincorporated land and each city inside its own limits (such as Jennings, Welsh). The zoning district decides the uses, how many homes and the smallest lot it allows on 5 acres. ParcelSheet shows the lot size as mapped and the use code on the parcel record; the planning office has the district and its rules. See the Jefferson Davis Parish website.
What are the residential setbacks in Jefferson Davis Parish (2026)?
Setbacks in Jefferson Davis Parish come from the zoning code of the parish, or of the city when the lot is inside city limits: the front, side and rear distances depend on the lot's district. ParcelSheet does not draw setback lines or give a number it did not read; the zoning office gives them for the district. See the Jefferson Davis Parish website.
Next to Jefferson Davis Parish: Acadia Parish, Allen Parish, Beauregard Parish, Calcasieu Parish, Cameron Parish, Evangeline Parish, Vermilion Parish.
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