Docks, seawalls and shoreline permits — Sebastian, Florida

A Sebastian dock or seawall answers to three agencies: the City of Sebastian Building Department, the Florida Department of Environmental Protection and the U.S. Army Corps of Engineers (Florida DEP).

The City of Sebastian Building Department issues the construction permit, the Florida Department of Environmental Protection decides whether the work needs a state environmental resource permit or qualifies for an exemption, and the U.S. Army Corps of Engineers covers the federal side. The DEP Central District handles Sebastian, since its nine counties include Brevard and Indian River along with Lake, Marion, Orange, Osceola, Seminole, Sumter and Volusia. On the federal side, the Jacksonville District of the Corps uses a State Programmatic General Permit, now SPGP VI, which authorizes five types of activities, including shoreline stabilization such as seawalls or riprap, boat ramps and docks, when the state has already approved the work.

The order matters for a Sebastian lot. The city's floodway guideline for residential docks in waterways (a PDF dated January 25, 2019) states that all other applicable outside agency approvals must be obtained before the city issues its permit, so a dock application on the Indian River Lagoon or a city canal normally arrives at Sebastian City Hall with the DEP exemption or permit already in hand. The open lagoon belongs to the state, a point Sebastian Daily reported in September 2018 when the state took down an unpermitted dock on a spoil island across the lagoon: the waters belong to the state, and docks there have to be approved and permitted by the state, with the City of Sebastian having no say over the island.

A private dock off Sebastian on the Indian River Lagoon is exempt from a state permit only at 500 square feet or less of over-water area, because the lagoon there is Outstanding Florida Waters (Florida Statutes 403.813).

Florida Statutes section 403.813 exempts a private dock that has 500 square feet or less of over-water surface area in an area designated as Outstanding Florida Waters, or 1,000 square feet or less elsewhere. The lagoon frontage along Indian River Drive falls in the stricter category. The Indian River-Malabar to Vero Beach Aquatic Preserve, which DEP lists as covering 28,000 acres in Brevard and Indian River counties and established in 1970, was designated Outstanding Florida Waters in 1979, so a riverfront dock in Sebastian has a 500 square foot ceiling for the exemption, counting walkway, terminal platform and any covered area.

Boat lifts and repairs have their own limits. The same statute allows a boat lift wholly inside a previously permitted slip, or one of no more than 500 square feet, or 200 square feet in an Outstanding Florida Water, alongside an exempt dock, so a Sebastian owner adding a lift to a riverfront dock on the lagoon works to the 200 square foot figure. Replacing or repairing an existing dock in the same footprint is also exempt so long as no additional aquatic resources are harmed. DEP runs a free online route: its ERP e-permitting page explains that self-certification lets an owner enter project details and certify that a single-family dock is exempt, and lists three uses: a new dock with or without a boat lift, repair or replacement of an existing dock, and adding a boat lift to an existing dock.

Seawalls are treated differently from docks. Section 403.813 exempts the restoration of seawalls at their previous locations or upland of them, or within 18 inches waterward of the old line, which covers most rebuilds of a failing wall on a Sebastian canal. A separate subsection exempts private docks of 1,000 square feet or less and seawalls in artificially created waterways, which describes the city's dug canals, but it expressly does not apply to new vertical seawalls in estuaries or lagoons unless the site is in an existing man-made canal already lined with seawalls. A new vertical wall on open Indian River Lagoon shoreline therefore needs a full state permit.

The City of Sebastian requires a building permit for a dock or seawall and, in a mapped floodway, an engineer certified no-rise study unless the dock is a single straight pier above base flood elevation (City of Sebastian).

The Building Forms page lists two documents for this work, Residential Docks in Waterways and Residential Docks in Waterways, Required Form. The guideline explains that FEMA rules bar encroachments into a floodway shown on the Flood Insurance Rate Map unless an engineering analysis and no-rise certification show no effect on flood elevations. Sebastian waives the no-rise study only for a single straight pier whose lowest horizontal supporting member sits above the base flood elevation and no lower than 5 feet NAVD 88. Seawalls, fill, embankments and any dock below the base flood elevation in a floodway require a hydrologic and hydraulic study certified by a Florida professional engineer, and the required form has the owner acknowledge, before a notary, that an as-built survey will be submitted before final inspection.

Fees follow job value. Sebastian's flat-fee specialty table has no line for docks or seawalls, and the city's General Building Permit schedule charges $90 for the first $3,000 of valuation plus $11.50 for each additional thousand up to $50,000, and $630 for the first $50,000 plus $8.50 per thousand up to $100,000. The state's new under-$7,500 permit exemption offers no shortcut on the water: the city exemption page states it does not apply to property located entirely or partially in a flood hazard area. Building without a permit costs a contractor the greater of $300 or double the permit fee, according to the Other Administrative Fees page. The Building Permits FAQ adds that the City Code separately requires permits for right-of-way construction and site work such as fill placement, which can apply to the backfill behind a new wall.

Seawall responsibility on Sebastian canals depends on who owns the bank, and in 2015 the Elkam Canal walls sat within an easement owned by homeowners (Vero News).

Sebastian has argued the question twice. In February 2010 the city finished dredging Collier Creek Canal and installing seawalls, and Vero News reported that of the 35 or so docks the city removed for the project, only three were properly permitted, according to City Manager Al Minner. City plans called for pilings eight inches in diameter extended 10 feet below grade, a standard council members criticized, and on Feb. 10, 2010 the Sebastian City Council voted 4-0 to let owners rebuild at their own expense (Vero News, Feb. 11, 2010). A month later the council voted 3-1 to charge a permit fee, estimated at about $75, to owners whose original docks had not been permitted (Vero News, March 14, 2010).

The southern canals raised the ownership question directly. In January 2015, a property survey showed that the failing seawalls along the Elkam Canal sat within an easement owned by the homeowners rather than on city land, yet the council concluded that Sebastian was most likely responsible for repairs (Vero News, Jan. 30, 2015). That February the council voted 4-1 to spend $50,000 from reserves on an engineering study of the South Collier Canal, George Street Canal, Schumann Waterway and Elkcam Waterway, noting that any fix could require St. Johns River Water Management District permits and might qualify for a 50 percent district match (Vero News, Feb. 20, 2015).

The resulting assessment set the scale. Approximately 61,000 linear feet of seawall serving 601 homes were inspected in 2015; about 38 percent of the canal banks had no seawall at all, and options for the system ran from $14.9 million to $23.8 million, with individual repairs estimated at $400 to $800 per linear foot (Vero News, Aug. 27, 2015). Those reports explain why canal-front owners in Sebastian check the plat and the city's records before hiring a marine contractor. The same history shows why Sebastian staff ask for proof of an original permit when a canal dock is rebuilt: in 2010 the council tied the fee to whether the old structure had been permitted at all.

Mangrove trimming and seagrass damage on the Sebastian shoreline fall under state law, the 1996 Mangrove Trimming and Preservation Act and an aquatic preserve fine of up to $1,000 (Florida DEP).

DEP's mangrove program administers the 1996 Mangrove Trimming and Preservation Act, sections 403.9321 to 403.9334 of the Florida Statutes, which regulates trimming of red, black and white mangroves, living or dead, through DEP district offices and delegated local governments. On a Sebastian shoreline lot, trimming to open a dock view falls under that law rather than city tree rules. In the aquatic preserve, DEP notes that damage to seagrass can bring a fine of up to $1,000, a cost that applies to prop scarring during construction as much as to recreational boating near the Main Street Boat Ramp or Dale Wimbrow Park, both listed by DEP as public access points.

Applications in the city go through the MGO Connect portal of the Sebastian Building Department at 1225 Main Street, phone 772-589-5537, open weekdays from 8 a.m. to 4:30 p.m. and closed from noon to 1 p.m. Last verified: October 10, 2026, on the City of Sebastian website.