
Is New Orleans Sinking?
Yep!
But not everywhere
As I mention here often: New Orleans is not one market, it's dozens of micro-markets. Those micro-markets are sitting on different geology. Once you understand the topography, the decision to buy here gets a lot clearer.
The neighborhoods built on natural high ground are geologically stable.
The oldest neighborhoods were built on natural levee ridges created by the Mississippi River over thousands of years. They've been above sea level for 300 years.
| Neighborhood | Elevation | Notes |
|---|---|---|
| Garden District | 0.5 to 2m above sea level | Natural levee ridge — stable ground |
| Bywater | 0 to 1m above sea level | Natural levee ridge — stable ground |
| Esplanade Ridge | 0.5 to 1m above sea level | Ancient high ground — stable |
| Bayou St. John | 0 to 0.5m above sea level | Natural levee ridge — stable |
| Broadmoor | -0.5 to -1.25m below sea level | Drained swampland — higher risk |
| Lakeview | -1.25 to -4m below sea level | Drained swampland — higher risk |
| Gentilly | -1.25 to -4m below sea level | Drained swampland — higher risk |
Source: USGS elevation data via Greater New Orleans Community Data Center, 2005
This is the map from the Data Center: https://www.datacenterresearch.org/maps/reference-maps/#gallery-7
Why does it vary so much?
After 1900 the Army Corps of Engineers built drainage systems powerful enough to pump out the cypress swamps surrounding the original city. That opened up land for development but draining organic peaty soil causes it to compress and sink.
So should you avoid New Orleans? Or just be mindful of your neighborhood?
I found this site that lets you look up any address to determine the elevation.
https://geocodify.com/what-is-my-elevation
Type in any New Orleans address. Positive number = above sea level. Negative number = below.
Note: Results in New Orleans can vary, the neighborhood map above is the most reliable reference for block-level accuracy.
Happy to answer questions about specific neighborhoods or addresses below.