Docks, Seawalls, and Sovereignty Submerged Lands in Florida: Authorizations Under Chapter 18-21
- Endless Life Design
- 1 hour ago
- 3 min read
Build a dock, seawall, or marina in Florida and you are almost always building over land the state owns: sovereignty submerged lands held in public trust. Using that bottom requires a proprietary authorization that runs alongside the environmental permit. For Miami waterfront work, especially in Biscayne Bay, the two reviews move together. Endless Life Design handles marine construction through both tracks.
TABLE OF CONTENTS
Who Owns the Bottom: Sovereignty Submerged Lands
Four Forms of Authorization
When You Need a Lease
Proprietary Versus Regulatory Review (the Joint Application)
Aquatic Preserves and the Biscayne Bay Difference
Projects That Go to the Board of Trustees
County and Municipality Inspection Comments for Permit Approval
Related Resources
Why Choose Endless Life Design
WHO OWNS THE BOTTOM: SOVEREIGNTY SUBMERGED LANDS
Title to sovereignty submerged lands is held by the Board of Trustees of the Internal Improvement Trust Fund. The Department of Environmental Protection administers the use of those lands under Chapter 253, Florida Statutes, and Chapter 18-21, Florida Administrative Code. Any structure or activity over state-owned bottom requires a proprietary authorization in addition to any regulatory permit.
FOUR FORMS OF AUTHORIZATION
Chapter 18-21 provides several forms of authorization, scaled to the activity:
Consent by rule — granted directly in Rule 18-21.005(1)(b) for certain minor activities, such as a qualifying private single-family dock, with no further documentation.
Letter of consent — a nonpossessory interest allowing the applicant to erect specific structures or conduct specific activities.
Lease — an interest granting exclusive use, possession, and control for a set term at a fixed rental, used for revenue-generating and larger facilities.
Easement — for utility crossings, road and bridge crossings, and similar rights-of-way.
WHEN YOU NEED A LEASE
A submerged-lands lease is generally required for private residential multi-family docks designed or used to moor three or more vessels, docks mooring ten or more vessels in Monroe County, commercial or industrial docks, and any revenue-generating activity. Single-family docks that meet the criteria can often proceed under consent by rule or a letter of consent.
PROPRIETARY VERSUS REGULATORY REVIEW (THE JOINT APPLICATION)
The proprietary authorization to use state lands is distinct from the regulatory Environmental Resource Permit, but the linkage and delegation provisions of Chapter 18-21 allow DEP and the water management districts to process the linked applications together. The joint application, Form 62-330.060(1), covers the ERP, the Authorization to Use State-Owned Submerged Lands, and the federal dredge-and-fill review in a single submittal.
AQUATIC PRESERVES AND THE BISCAYNE BAY DIFFERENCE
Work in an aquatic preserve carries heightened standards. Commercial and industrial docks in the Biscayne Bay Aquatic Preserve are subject to additional criteria under the aquatic-preserve rules, and the Florida Keys have specific marina and dock siting policies under Rule 18-21.0041. These overlays frequently shape what can be approved on Miami-Dade and Monroe County waterfronts.
PROJECTS THAT GO TO THE BOARD OF TRUSTEES
Larger facilities are not delegated to staff and must go before the Board of Trustees, including docking facilities with more than 50 slips, modifications adding more than 10 percent of slips where the existing and proposed total exceeds 50, and facilities with a preempted area greater than 50,000 square feet.
COUNTY AND MUNICIPALITY INSPECTION COMMENTS FOR PERMIT APPROVAL
Common comments include:
Proprietary authorization not obtained for structures over state-owned bottom.
Wrong form of authorization sought for the slip count or use proposed.
Preempted area and riparian-line setbacks not correctly documented.
Aquatic-preserve or Florida Keys siting criteria not addressed.
Local building permit for the dock or seawall filed without the state authorization in hand.
RELATED RESOURCES
WHY CHOOSE ENDLESS LIFE DESIGN
Endless Life Design is a licensed Florida general contractor serving Miami-Dade, Broward, and Palm Beach counties across construction, engineering, architecture, interior design, and 3D rendering. We coordinate state environmental, water-management, and building-department approvals as one accountable process, so your project advances from blueprint to certificate of occupancy without avoidable delay.
Endless Life Design — Licensed Florida General Contractor. Visit endlesslifedesign.com, call (305) 680-3283, or email endlesslifedesign@endlesslifedesign.com.
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