Gretna, LA Hurricane Preparedness: Flood Elevation (2026)

Section 10-15(a) sets Gretna's local elevation-certification chain for new construction, on top of any state or federal flood requirement. Subsection (a)(1), Floor elevation, states plainly that "no superstructure shall be erected until an acceptable floor elevation has been determined," making floor-elevation approval a precondition to starting construction rather than a step that can be handled afterward. Subsection (a)(2), Grade elevation, requires the site to be raised to grade with approved sanitary fill, sloping upward from the established curb height at one-half inch per foot of sidewalk width, then one inch per 20 feet toward the rear property line, or an alternate method the code official approves; once an acceptable grade is set, the owner is responsible for maintaining it.

00 general liability policy and a riggers endorsement under § 10-12. The whole elevation chain closes at subsection (e)(5): "A certificate of use and occupancy and compliance shall not be issued until a final elevation certificate has been secured," so a builder cannot get a family into a raised or new home until that certificate confirming the as-built elevation is on file with the building official.