Is an Engineer Stamp Required for My Deck Project in Louisiana?

Louisiana's parishes — Orleans, Jefferson, East Baton Rouge, St. Tammany — review structural drawings for decks under the Louisiana State Uniform Construction Code, and the PE seal is the standard requirement for non-prescriptive decks. The seal must show the engineer's name, Louisiana PE number, and date, and the engineer must be in responsible charge of the engineering. Elevated decks, Gulf Coast decks, and decks with roofs are treated the same at the structural level. Owner-builders don't escape the requirement: the parish asks for the seal regardless of who drafted the plans.

The engineer reviews the deck plan and elevations, designs the footings for Louisiana's soft Delta soils and the high water table — deep foundations are common where the near-surface soils are weak — sizes beams, joists, and posts, and checks the ledger connection and the lateral system for extreme hurricane wind, coastal flood, and seismic demand per the LSUCCC. Coastal decks get extra scrutiny for extreme wind and erosion. Hot tubs add concentrated loads that prescriptive tables don't cover. Bring the site survey, the geotechnical report, and the deck plans. Wind design is the item most deck plans miss.

Use this checklist before engaging an engineer for your deck: • Engineer of record holds an active Louisiana PE license, verifiable on the state roster • Dimensioned deck plan and elevations ready for structural review • Site survey showing setbacks, easements, flood zone, and existing structures • Hurricane wind design verified for the extreme exposure • Footing design verified for soft Delta soils • Ledger connection to the house detailed and verified • Engineer confirms they'll respond to plan-check corrections on sealed sheets • Seal shows name, Louisiana PE number, and date on every sealed sheet