Flood vents in Jupiter
Flood vents in Jupiter, where new FEMA flood maps took effect in December 2024.
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The short answer
Jupiter's current FEMA flood maps took effect on 20 December 2024, and the Town says its scattered flood areas put every property at some risk. NOAA's Jupiter Inlet gauge shows a 2.75 ft great diurnal range, one of the larger tides in South Florida.
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Who needs flood vents
Owners with garages, storage rooms or crawlspaces below base flood elevation in A zones.
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.
Vents are sized to FEMA's one square inch per square foot rule for the enclosed area in your zone.[1]
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 tide levels show how close high water already gets to the enclosure.[2]
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.[3]
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.[4][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.
Sizing flood vents
A 400 sq ft garage needs at least 400 square inches of net open area, split across at least 2 walls, unless engineered vents carry a design certification for a smaller area. FEMA says designs must either carry a certification or meet the prescriptive criteria.[7][8]
| Rule | Requirement |
|---|---|
| Number | At least 2 openings on at least 2 walls |
| Size | At least 1 sq in net area per sq ft of enclosed flood-prone area |
| Height | Bottom no higher than 1 ft above adjacent grade |
| Garage doors | Do not count as flood openings |
Frequently asked questions
Did Jupiter's flood zones change recently?
Yes. FEMA's new flood zone maps took effect on 20 December 2024. Check your zone, because insurance and building requirements follow it.
How much does the tide move in Jupiter?
At NOAA's Jupiter Inlet south jetty station, a 2.39 ft mean range and a 2.75 ft great diurnal range (1983 to 2001 epoch).
Can the Town of Jupiter advise me on flood protection?
Yes. Staff will visit a site and advise on flood panels, berms, flood walls and elevating structures.
Sources
- Flood Zones and Insurance Information, Town of Jupiter. Accessed October 28, 2026.
- Datums for station 8722495, Jupiter Inlet, south jetty (tidal epoch 1983 to 2001), NOAA Center for Operational Oceanographic Products and Services (CO-OPS), Tides and Currents. Accessed October 28, 2026.
- Flood Mitigation Advice, Town of Jupiter. Accessed October 28, 2026.
- Marine Structure: Seawalls permit checklist (revised January 2021), Town of Jupiter Building Department. Accessed October 28, 2026.
- Marine Structure: Docks permit checklist (revised January 2021), Town of Jupiter Building Department. Accessed October 28, 2026.
- Application for Dock Waiver (form dated 14 Mar 2016, quoting Town Code 27-2626), Town of Jupiter Department of Planning and Zoning. Accessed October 28, 2026.
- Proper Openings: Enclosures (Applicable to Zones A, A1-A30, AE, AO, AH, AR and AR Dual) (glossary), Federal Emergency Management Agency (FEMA). Accessed October 27, 2026.
- Openings (glossary), Federal Emergency Management Agency (FEMA). Accessed October 27, 2026.
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