Seawall raising in Jupiter

Who needs a seawall raised

Owners whose walls overtop at king tides, owners who have been cited, and owners planning a repair big enough to trigger the city's height rule.

• Water over the cap at high tide
• A city citation for overtopping
• A repair of $300 or more per linear foot in Miami Beach
• Plans to sell, rebuild or add a dock

A cap no higher than base flood elevation

Jupiter caps seawalls from above: the top of the concrete cap, in NAVD, must be at or below the property's base flood elevation (Code 27-2624(8)). Since FEMA's new maps took effect on 20 December 2024, the BFE on the current map is the number to check before a cap is designed.

A raise is designed to that number, measured in the right datum, and checked by survey before the cap pour.[1][2]

New flood maps since December 2024

FEMA's new flood maps for Jupiter took effect on 20 December 2024, and the Town warns that its flood hazard areas are scattered, so every property can flood. Owners whose zone changed may need to adjust their insurance, and that zone decides whether vents or barriers are required or simply sensible.

Raising the wall stops tidal overtopping, but the home behind it still relies on its own flood protection.[2]

Inlet tide on the Loxahatchee

NOAA's Jupiter Inlet south jetty station records a 2.39 ft mean range and a 2.75 ft great diurnal range, with mean higher high water about 0.19 ft above NAVD 88 (1983 to 2001 epoch). Lift travel and floating dock gangways near the inlet are planned from this gauge.

Those numbers show how much margin a raised wall really gives above an ordinary high tide.[3]

Free advice from Town staff

Town staff will visit a property to review flood concerns and can advise on flood panels, berms, flood walls and raising structures. In a Special Flood Hazard Zone, work costing 50% or more of the building's market value is a substantial improvement and must bring the whole building to current code.[4]

What makes Jupiter different

Town Code 27-2626 keeps half of every waterway clear: a centreline channel of 50% of the waterway width must stay unobstructed, or at least a 15 ft channel where that cannot be met. Only rectangular, T and L shaped docks are allowed unless the Planning and Zoning Director approves another shape.[6]

Who approves what

The Town's checklists ask for FDEP self-certification or exemption verification, Army Corps approval if not included in the DEP decision, and SFWMD approval for structures on submerged lands or in natural waterways such as the Loxahatchee River, the Intracoastal Waterway and Sawfish Bay.[1][5]

Permits in Jupiter

• Town of Jupiter Building and Planning and Zoning: Marine structure permits; dock waivers under Town Code 27-2626.
• Florida DEP or South Florida Water Management District: FDEP self-certification or exemption verification for canal docks; SFWMD approval for structures in the Loxahatchee River, the Intracoastal and Sawfish Bay.
• US Army Corps of Engineers, Jacksonville District: Army Corps approval where the FDEP decision does not include it, as the Town checklists note.

Seawall height rules by city

Each city sets its own standard, and they do not all use the same vertical datum (NAVD 88 or the older NGVD 1929), so the engineer's survey must state the wall height in the same datum as your city's rule.

Miami Beach: 5.7 ft NAVD for new walls and substantial repairs, or 4 ft NAVD designed to reach 5.7 ft. Coral Gables: a minimum of 6 ft NGVD 1929, structurally able to support 7.5 ft. Fort Lauderdale: a minimum of 5 ft NAVD88, and walls permitted before 1 January 2035 may be built at 4 ft if designed to reach 5 ft by 1 January 2050. Boca Raton: new or replaced walls between 4.0 and 6.0 ft NAVD88, designed to take another 12 to 18 inches.

City of Miami: a 2020 proposal set 6 ft NAVD 88 east of US-1. We have not confirmed it was adopted, so we check with the City for each job.[7][11][13][14][10]

Help with the cost

Miami Beach's Private Property Adaptation program accepts seawall applications on a rolling basis and reimburses 50% of costs up to $20,000, including the $2,500 assessment value; qualifying low to moderate income households need no match up to $17,500. Homes built at least 1 ft above base flood elevation are not eligible. Coral Gables waives a fee for existing homes raising seawalls for sea level rise.[8][12]

Frequently asked questions