Build Responsibly in a Floodplain

Land in Gretna is in a floodplain. All development to build, fill, or otherwise alter land requires a permit.

The Gretna Unified Development Code (UDC) addresses requirements in Section 58-288 – Standards of Construction.

Structures must be built to or brought into compliance with current minimum elevation standards in the following situations:

• New Construction
  Any construction of a new structure commencing on or after the date of effective ordinance.
• Substantial Improvement
  When the cost of construction, rehabilitation, additions, or other improvements to a building equals or exceeds 50% of the fair market value.
• Substantial Damage
  When a structure receives damages and the cost of all repairs equals or exceeds 50% of the building’s fair market value.

Contact the Building Department to obtain necessary permits at 504-363-1563.

Due to the requirements of the National Flood Insurance Program and the overall goal for a more hazard-resistant and sustainable community, Gretna’s Ordinance – Chapter 28 looks at the height requirements for residential and non-residential buildings. Be sure to hire a licensed contractor who knows the rules.

Report any suspected illegal development in the floodplain using this form.