Seawall permits in Collier County
Three separate agencies can have something to say about a seawall in Naples, and they do not talk to each other on your behalf. Collier County reviews the structure. Florida DEP governs whether you are allowed to be where you are putting it. The Army Corps sits behind DEP on federal waters. Here is what each one actually asks for, read off the agencies rather than off another contractor's page.
Updated August 2026
Layer one: the county building permit
Unincorporated Collier County files seawall work under its Marine permit type, coded PRMAR, which the county describes as covering docks, seawalls, boat lifts and marine demolition. On the permit application itself, seawall and commercial seawall appear as selectable work items, so there is no ambiguity about whether your job belongs there.
The county's stated submittal requirements for that type are a site planning document and construction plans reflecting the scope of work, signed and sealed by an architect or registered professional engineer where the scope calls for it. The application also asks for a declared construction cost, whether the work relates to a natural disaster, whether a private provider is doing the review or the inspections, and whether the property owner is doing the work. Building permits in the county run against the Florida Building Code, 8th Edition (2023), which took effect on 31 December 2023.
Two jurisdictional traps catch people. The first: the City of Naples and the City of Marco Island run their own building departments, so a lot inside city limits is not a county submission. The second: contractors are licensed under chapter 489 of the Florida Statutes and Collier County Ordinance 2006-46, and the county's own wording is that it is unlawful to contract without a certificate of competency. A run of specialty licenses was dropped on 1 July 2025; marine work was not among them.
Where to ask. Growth Management Community Development, 2800 N. Horseshoe Drive, Naples FL 34104. Permit intake and customer service is on (239) 252-2400, contractor licensing on (239) 252-2431, and there is a separate floodplain hotline on (239) 252-2942. The public permit portal moved to cvportal.collier.gov, and property records there are searchable by address.
Layer two: the state, and the 18-inch line that decides it
Florida's environmental resource permitting program, run by DEP and the water management districts, regulates work that affects surface water flows, including dredging and filling in wetlands and other surface waters. A seawall sits squarely inside that description. What keeps most repair jobs out of it is one paragraph of statute.
Section 403.813(1)(e) of the Florida Statutes exempts, in its own words, "the restoration of seawalls at their previous locations or upland of, or within 18 inches waterward of, their previous locations." The exemption rule that implements it is 62-330.051 of the Florida Administrative Code, Exempt Activities, effective 1 June 2018.
Read the second half of that paragraph too, because it is the part that gets skipped: the statute says the exemption "may not affect the permitting requirements of chapter 161," which is the coastal construction law. In practice, the 18-inch exemption gets you out of environmental resource permitting and does nothing at all for a Gulf-front property in front of the control line.
New wall in a place that never had one is a different paragraph. Section 403.813(1)(i) exempts seawall construction in artificially created waterways, but it explicitly withholds that exemption from vertical seawalls in estuaries and lagoons unless the work sits in an existing manmade canal whose shoreline already carries vertical seawall. Most Naples finger canals meet that description. Naples Bay itself and the Gordon River are a different conversation.
The measurement that matters. The exemption is written against the previous wall's position, not against the property line and not against the water. If a new vinyl face is driven in front of a failing concrete wall, the finished face position is what gets compared. Eighteen inches is not much once you allow for the old wall's thickness and the clearance a rig needs, so establish the number before anyone orders panels rather than after.
Layer three: the coastal construction control line
Chapter 161 of the Florida Statutes sets a control line seaward of which the state applies its own siting and design standards, under rule 62B-33 of the Florida Administrative Code. DEP describes the program as regulating structures and activities that can cause beach erosion, destabilize dunes, damage upland properties or interfere with public access, and it protects sea turtles and dune plants as well.
For Naples this is the split between the canal owners and the beach owners. A wall on a finger canal behind Aqualane Shores is nowhere near the control line. A wall on the Gulf side of Gulf Shore Boulevard, or on Marco Island's beach frontage, may well be seaward of it, and if it is, the state review is a separate application with its own standards and its own timing. DEP's control line program takes questions on (850) 245-8570, and it publishes a map to locate the line.
Layer four: federal, usually handled inside the state review
The Jacksonville District of the Army Corps issued the sixth State Programmatic General Permit, SPGP VI, on 27 July 2021, to avoid duplicating state review for minor work in waters of the United States. Shoreline stabilization is one of its named categories, expanded in that version to include living shorelines, so most seawall work in Collier County that clears the state can pick up federal coverage through the same review rather than a separate Corps application.
The self-certification path has excluded areas, and two of them are worth checking against a Collier County address: the Florida Panther Consultation Area, and the Faka Union Canal, both named on DEP's own exclusions list. Being inside an excluded area does not stop the work. It means the federal side gets handled by the Corps directly rather than by self-certification, and that is a schedule question your contractor should raise before you sign, not after.
Where flood elevation and tidal datum come into it
Neither FEMA nor NOAA issues a permit. Both show up in the paperwork anyway, because the drawings have to be referenced to something.
Flood mapping is the FEMA piece. Collier County's current effective panel is 12021C0393J, in force since 8 February 2024, and it is the map that assigns your parcel its zone and its base flood elevation. The wall itself is a retaining structure rather than a building, so it is not where floodplain review bites hardest. What it governs is everything you rebuild behind the wall afterwards: the pool deck, the boat house, the enclosure, the fill you bring in to replace what washed out. That is what the county's floodplain hotline exists for.
The tidal datum is the NOAA piece, and it is quieter but it decides boundaries. Elevations on seawall drawings here are quoted in feet NAVD88, while the legal edge of private upland is mean high water, and the two are not the same number. At NOAA's Naples Bay gauge, mean high water sits 0.44 feet above NAVD88 and mean higher-high water 0.69 feet, with mean lower-low water 2.07 feet below it. Land waterward of mean high water is sovereign submerged land held by the state, which is the underlying reason a statute cares about eighteen inches in the first place.
The order to do it in
- Establish where the existing wall face is, surveyed, before any design work. That single measurement decides whether you are exempt from state permitting or applying for it, and everything downstream depends on the answer.
- Find out whether the parcel is seaward of the coastal construction control line. On a canal lot this takes one look at DEP's map; on a Gulf-front lot it changes the whole project.
- Get construction plans prepared, signed and sealed where the scope requires it, and confirm who is pulling the county permit and under what license.
- Submit to the county under the Marine type, with the site plan showing the existing and proposed wall positions clearly enough that a reviewer can see the 18-inch question answered.
- Let the state review carry the federal authorization where SPGP VI covers it, and find out early if an exclusion applies to your address.
What this page is not. It is a reading of published agency requirements, current as of August 2026, written so a homeowner can tell whether a contractor's account of the process is plausible. Agencies revise rules, the county revises fee schedules and forms, and the only authority on your permit is the reviewer holding it. Every source above is named so you can go check it yourself.
Permitting questions
Do I need a permit to repair my seawall in Collier County?
For the county, yes: seawall work is reviewed under the Marine permit type, and the county lists seawall and commercial seawall as work items on that application alongside docks and marine demolition. For the state, often no, because Florida law exempts restoring a wall in place from environmental resource permitting. Those two answers are independent and people conflate them constantly. A state exemption is not a county permit, and a county permit is not federal authorization.
What exactly does the 18-inch rule say?
Section 403.813(1)(e) of the Florida Statutes exempts "the restoration of seawalls at their previous locations or upland of, or within 18 inches waterward of, their previous locations." The same paragraph then says the exemption does not reach chapter 161, which is the coastal construction control line law. So an in-place restoration behind the control line is clear of environmental resource permitting; the same job in front of the line still needs its chapter 161 approval.
Can I put a new vinyl wall in front of my old concrete one?
Only if the new face lands within 18 inches of where the old one stood, or you apply. Facing an existing wall is the most common repair on this coast and the cheapest way to lose the exemption, because a vinyl panel driven clear of a spalling concrete face plus the width of the panel itself adds up quickly. Measure the finished face position against the old one before anyone orders material.
Who is allowed to pull the permit?
A contractor holding the right credential, or you, as owner-builder. Collier County licenses contractors under chapter 489 of the Florida Statutes and its own Ordinance 2006-46, and states plainly that it is unlawful to contract without a certificate of competency. The county publishes an owner-builder application as part of the marine submittal package, which is legal and which also makes you the party the county comes back to if the work fails inspection.
Does the flood zone change what I can build?
Not the wall itself, in most cases, but it changes what the county wants to see and what happens to anything you build behind the wall. Base flood elevations on Naples waterfront run from 8 to 13 feet NAVD88 on the panel that took effect in February 2024, and floodplain review attaches to structures rather than to retaining walls. Where it does bite is the pool deck, the boat house and the enclosure you rebuild afterwards. Collier County runs a floodplain hotline for exactly this question.
How long does the whole thing take?
Nobody outside the review queue can promise a date, and this page will not invent one. What you can control is the number of review cycles, and the two things that cause extra cycles are a site plan that does not show the existing wall position clearly enough to establish the 18-inch question, and construction plans that are not signed and sealed when the scope required it. Both are fixable before you submit rather than after.