Orleans Parish is a consolidated city-parish government where the City of New Orleans holds all jurisdiction for building permits and zoning. There are no other incorporated municipalities within the parish, meaning all construction activity is managed through the city's One Stop App. The area is subject to strict flood zone regulations and coastal building standards due to its elevation and proximity to the Gulf Coast.
How this fits with the state
The state authority here is Louisiana State Licensing Board for Contractors. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.