Florida Seawall Regulations: Permits, Timeline, and Penalties

Building or replacing a seawall on Florida waterfront property requires a Florida seawall permit from the Florida Department of Environmental Protection (FDEP), and in most cases a second authorization from the U.S. Army Corps of Engineers. The state fee for a rigid coastal structure starts at $3,000 for the first 100 feet, and approval typically takes 90 to 120 days when the application is complete and uncontested.

Which Permits Apply to Your Project

Three separate authorizations can come into play, and which ones you need depends on where your property sits and what the wall will touch.

FDEP administers coastal construction permits under Florida Statute Chapter 161. A permit is required before anyone builds a seawall, revetment, or similar structure on sovereignty lands below the mean high-water line.¹ FDEP evaluates whether the project will destabilize the shoreline, harm the beach-dune system, or damage marine habitat.

If your property fronts the Atlantic, the Gulf, or the Straits of Florida, FDEP has drawn a Coastal Construction Control Line (CCCL) along the beach marking the area that would be subject to severe damage from a 100-year storm. Any seawall seaward of the CCCL needs a separate CCCL permit under Section 161.053, in addition to any Environmental Resource Permit (ERP) that applies.² If your lot is on a canal, river, or interior waterway rather than an ocean-facing beach, the CCCL permit usually doesn’t apply and the ERP plus federal authorization typically does.

At the federal level, Section 404 of the Clean Water Act gives the U.S. Army Corps of Engineers (USACE) authority over any discharge of dredged or fill material into navigable waters.³ Most seawalls place material waterward of mean high water, which triggers USACE review. Residential projects usually qualify for streamlined federal authorization under Nationwide Permit 13 (Bank Stabilization) if the wall is 500 feet or less along the bank; longer projects require pre-construction notification to the district engineer, and walls that exceed the nationwide permit’s limits need an individual USACE permit that adds months.⁴

Florida makes this easier by allowing a joint application that submits state and federal packages together rather than filing separately.⁵ Local governments add a third layer: you need written confirmation from your county or municipality that the project complies with zoning and local setback rules before FDEP will process the application.⁶

When You May Not Need an ERP

Florida law exempts a few specific situations from the Environmental Resource Permit requirement. These exemptions are narrow, and misreading them is expensive.

Rebuilding a seawall at its previous location, or within 18 inches waterward of it, is exempt under Florida Statute 403.813.⁷
A private seawall in an artificially created waterway is exempt if it doesn’t violate water quality standards, block navigation, or affect flood control. Vertical seawalls in estuaries or lagoons only qualify if the existing shoreline in the canal is already vertical.⁷
An infill seawall connecting two existing seawalls at both ends, following the same construction line, and spanning no more than 150 feet is exempt if water quality, navigation, and flood control are not affected.⁷

Here is the catch: none of these ERP exemptions eliminate the Chapter 161 coastal construction permit. The statute says so explicitly.⁷ If your wall is on sovereignty lands below the mean high-water line or seaward of the CCCL, you still need FDEP authorization under Section 161.041 or 161.053 even when the ERP is waived.

What Goes in the Application

For projects seaward of the CCCL, you file the CCCL permit application (DEP Form 73-100). For larger projects affecting sovereign submerged lands or coastal processes, you use the Joint Coastal Permit application (DEP Form 73-500), which also covers the USACE authorization and sovereign submerged lands authorization in one filing.⁵

The core documentation is similar either way:

Proof of ownership through a recorded warranty deed, long-term lease-purchase agreement, or property tax receipt. FDEP rejects quit claim deeds, purchase contracts, owner affidavits, and tax records from unofficial websites.⁶
A signed and sealed property survey based on fieldwork done within the last six months, showing the mean high-water line, existing structures, and vegetation.⁶
Written confirmation from the local government that the project complies with local setback requirements and zoning.⁶
Engineering drawings prepared by a Florida-licensed professional engineer, showing materials, dimensions, and the proposed location. Any existing rigid coastal structure must be certified by a Florida-licensed engineer to provide protective value against a storm with a 15-year or greater return interval.⁸
A marine turtle lighting plan showing every permanent exterior fixture and its specifications, if the structure includes any exterior lighting.⁶
An environmental mitigation plan where the project area contains protected species habitat, mangroves, seagrass, or other sensitive resources.

FDEP accepts applications electronically. You can submit by email to the Beaches, Inlets and Ports Program, or upload files over 20 MB to FDEP’s secure FTP site.⁹ Electronic submission qualifies for a 10% fee discount.

Permit Fees

FDEP classifies seawalls as rigid coastal structures. The base fee is $3,000 for the first 100 feet of seawall length, including return walls, plus $500 for each additional 50 feet.¹⁰ A 200-foot residential seawall would carry a $4,000 fee before any discount.

Electronic filings receive the 10% discount. Modifying an already-permitted seawall costs $500 for a design revision, or the full rigid-structure fee if you’re adding length. Minor reconstruction or repair work falls under a separate $500 category. Payment goes through the DEP Business Portal after you receive a file number and payment instructions.⁹

These figures cover only the FDEP filing. Budget separately for the engineer and surveyor, any USACE fees if an individual federal permit is needed, and your county or municipal building permit fees.

Review Timeline

Once your application is filed, FDEP has 30 days to review it for completeness. If anything is missing, the agency issues a Request for Additional Information (RAI) and the clock pauses until you respond.¹¹

You get 90 days to supply the requested information. A second or third round of questions is common, with a 30-day clock for each side. Miss a deadline without requesting a written extension and the agency can deny the permit outright.¹¹ This is where most applications stall. A thorough initial package, with a survey less than six months old and local sign-offs already in hand, prevents the back-and-forth that adds months.

After the file is complete, substantive review begins. General permits take up to 60 days; individual permits take up to 90 days for final agency action.¹¹ Projects requiring environmental mitigation can run longer. FDEP also publishes a public notice within 10 days of finding the application complete, and adjoining property owners have 30 days (15 days for certain project types) to comment or challenge.¹²

A standard Environmental Resource Permit for construction stays valid for five years. If you can’t finish within that window, request an extension before it expires.

Design and Siting Rules

FDEP’s Coastal Armoring Policy requires armoring to be sited as far landward as practicable, designed to minimize impacts to the beach-dune system, sea turtles, and native vegetation, and built so it doesn’t block public beach access.¹³

Seaward of the CCCL, the structure must sit far enough landward to allow natural shoreline fluctuation. Where a frontal dune exists, the wall goes behind it, set back far enough to permit natural storm recovery. Where no frontal dune exists but the project includes dune restoration, the structure sits landward of the restored dune.⁸

The finished elevation must meet minimum flood resistance standards, and the design has to account for site-specific soil conditions and storm hydrostatic pressures. Common construction types include vertical concrete walls, vinyl sheet piles, riprap slopes, geotextile revetments, and sloped boulder revetments.¹³ Turbidity barriers during construction are standard to keep sediment from clouding surrounding waters and damaging seagrass.

Florida also recognizes a special “infill” category. Where a gap of 250 feet or less exists between two rigid coastal armoring structures, FDEP can issue a permit for a new seawall that connects both endpoints and follows the same construction line, without the more demanding showing normally required for new armoring.¹⁴

Living Shorelines as an Alternative

Not every waterfront lot needs a concrete wall. FDEP promotes living shorelines as an alternative to hardened armoring, particularly in low-energy environments like bays, estuaries, and interior waterways. A living shoreline uses natural materials such as oyster shell, native marsh plantings, and sloped riprap to absorb wave energy and reduce erosion.¹⁵

Small-scale living shoreline projects that meet specific criteria can qualify for a permit exemption under Florida Administrative Code 62-330.051(12)(e), which means no ERP is needed and the project moves forward without the full permitting timeline.¹⁶ For canal-front, bay-front, and river-front properties, this is worth evaluating before committing to a vertical wall. High-energy ocean-facing shorelines usually still require rigid armoring.

Hiring a Licensed Contractor

Florida requires a specific state license for seawall work. The credential is the Certified Marine Seawall Work Specialty Contractor license, issued by the Florida Department of Business and Professional Regulation through the Construction Industry Licensing Board.¹⁷ A certified contractor can work anywhere in Florida without meeting additional local competency requirements.

Qualifying requires at least four years of combined construction experience (including at least one year as a foreman), passing a licensing examination, minimum general liability insurance of $100,000, and a credit score of 660 or higher.¹⁷ Before signing a contract, verify the contractor’s license through the DBPR online license search. An unlicensed contractor performing seawall work puts both the contractor and the property owner at enforcement risk.

Penalties for Building Without a Permit

Under Florida Statute 161.054, anyone who willfully violates the coastal construction permit requirements faces fines of up to $15,000 per offense, and each day the violation continues counts as a separate offense.¹⁸ Two weeks of enforcement action could stack over $200,000 in potential fines before any other consequences.

Beyond fines, a property owner who damages sovereignty lands, beaches, or the beach-dune system through unpermitted construction is personally liable for the cost of repair. When multiple parties contribute to harm and their shares can’t be separated, each is jointly and severally liable for the whole amount.¹⁸

FDEP can also place a lien on the violator’s real and personal property to collect fines and damage awards. Any property with an outstanding coastal violation lien is automatically denied future permits until the violation is resolved.¹⁸ A property owner who builds an unpermitted seawall may be unable to permit any future coastal work, including repairs, until the original violation is settled and the lien released.

1
Online Sunshine. Florida Statutes 161.041 – Permits Required
2
Florida Senate. Florida Statutes 161.053 – Coastal Construction Control Line
3
U.S. Environmental Protection Agency. Overview of Clean Water Act Section 404
4
U.S. Army Corps of Engineers. Nationwide Permit 13 – Bank Stabilization
5
Florida Department of Environmental Protection. Joint Application for Joint Coastal Permit
6
Legal Information Institute. Florida Administrative Code 62B-33.008 – Application Requirements and Procedures for Areawide and Individual Permits
7
Online Sunshine. Florida Statutes 403.813 – Permits Not Required
8
Legal Information Institute. Florida Administrative Code 62B-33.005 – General Criteria for Coastal Construction and Excavation
9
Florida Department of Environmental Protection. Tools for Applicants
10
Florida Department of Environmental Protection. CCCL Permit Fee Worksheet for DEP 73-100 (Revised April 2025)
11
South Florida Water Management District. Environmental Resource Permit Questions and Answers
12
Legal Information Institute. Florida Administrative Code 62-331.060 – Public Notice
13
Florida Department of Environmental Protection. Coastal Armoring Policy and Guidelines
14
Online Sunshine. Florida Statutes 161.085 – Rigid Coastal Armoring Structures
15
Florida Department of Environmental Protection. Resilient Florida Program – Living Shorelines
16
Florida Department of Environmental Protection. A Homeowner’s Guide to the Living Shoreline Permit Exemption Part 1
17
Florida Department of Business and Professional Regulation. Application for Certified Marine Seawall Work Specialty Contractor
18
Online Sunshine. Florida Statutes 161.054 – Administrative Fines, Liability for Damage, Liens