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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.

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