Wetlands and Coastal Zone Permitting in Plaquemines Parish

A parish built at the edge of the delta

Plaquemines Parish occupies the lowest reaches of the Mississippi River, extending out to the river's bird's-foot delta where it empties into the Gulf of Mexico -- geographically one of the most wetland-dominated parishes in the state. Much of the parish's land outside the immediate natural river-levee ridges is interior marsh: brackish and freshwater wetland habitat that has historically supported fishing, trapping, and hunting camps as much as conventional agriculture or residential development. For a land buyer, this means a much larger share of parcels in Plaquemines will implicate wetlands regulation, directly or at the margin, than in almost any other Louisiana parish.

The Coastal Zone applies to the entire parish -- not just a strip near the coast

Louisiana's Coastal Zone is statutorily defined (R.S. 49:214.24), and unlike many of the roughly twenty parishes that fall only partly within it, Plaquemines Parish sits entirely inside that boundary. That means a Coastal Use Permit -- reviewed by the state's Office of Coastal Management -- generally applies to any use that directly and significantly affects coastal waters or wetlands anywhere in the parish, not just near the Gulf-facing edge. Dredging, filling, bulkheading, clearing wetland vegetation for development, and similar activities are the kinds of uses that typically trigger this review; ordinary maintenance of already-developed land generally does not, but the line between the two isn't always obvious on a wetland-adjacent parcel, so it's worth confirming directly with the Office of Coastal Management before undertaking any earth-moving or land-clearing work.

Land loss and wetland change: a real, long-term factor in evaluating marsh-adjacent land

Coastal Louisiana has experienced significant, well-documented wetland loss and land subsidence over recent decades, driven by a combination of leveeing the Mississippi River (which cut off the natural sediment deposition that used to rebuild delta marsh), saltwater intrusion, and broader subsidence and sea-level dynamics. Plaquemines, sitting at the delta's outer edge, is among the more exposed parishes to this long-running trend. For a buyer evaluating marsh-adjacent land -- whether for a camp, hunting/fishing access, or long-term holding -- that means today's shoreline, marsh boundary, or parcel access route is not guaranteed to look the same in twenty or thirty years, independent of any single storm event. This is a genuine, multi-decade planning consideration, not an alarmist add-on.

Various coastal restoration and land-building efforts (sediment diversions, marsh creation projects, and similar work) have been proposed and undertaken across the Louisiana coast, including within or near Plaquemines Parish, but this page does not assert the current status, scope, or specific location of any individual project -- that changes over time and should be confirmed directly with the state's coastal protection and restoration authority.

What to check before buying wetland-adjacent land here

Get a formal wetlands determination -- a jurisdictional determination from the U.S. Army Corps of Engineers -- for any Plaquemines parcel where wetland status isn't obviously settled, rather than relying on a visual read of the land. Separately, ask the Office of Coastal Management directly whether a Coastal Use Permit would be required for your intended use, since the entire parish falls within the Coastal Zone. And for any parcel valued partly for its marsh access, boundary, or acreage, treat that boundary as something that can shift over the years you own the land, not a fixed line -- a conversation with the parish and the state coastal authority about current restoration or protection plans near your specific tract is worth having before you buy, not after.