Docks & Seawalls on the St. Johns — Costs, Permits & How to Hire

Living on the St. Johns River — or one of Putnam’s lakes — often means a dock, a boat lift, or a seawall is part of the property. This is specialized, permitted work, and it’s not a job for a general handyman. Here’s what to know.

What docks and seawalls cost

A new residential dock commonly runs $15,000–$40,000+, depending on length, water depth, decking material, and whether you add a boat lift or a covered boathouse. Reaching navigable water on a shallow stretch of the river costs more.

Seawalls are usually priced per linear foot and vary widely with height, material (vinyl, concrete, rip-rap), and how accessible the shoreline is. Because a seawall is engineered to hold back water and soil, it’s a specialized structural job.

The permits you’ll need

Waterfront construction here is regulated. Expect:

An Environmental Resource Permit from the St. Johns River Water Management District (SJRWMD).
Often authorization from the U.S. Army Corps of Engineers.
County sign-off.

Permitting can take weeks to a few months. A licensed marine contractor manages the whole process — that’s a big part of what you’re paying for.

How to hire a marine contractor

Use a licensed, insured marine contractor — not a general builder.
Confirm they handle SJRWMD / Army Corps permitting for you.
Ask to see recent local dock or seawall projects on the St. Johns.
Get multiple quotes and compare scope and materials.

Building on the water in Putnam County?

Marine contractors, dock builders, and seawall specialists who serve the St. Johns are exactly the kind of business Putnam Locals wants to list. Run a marine contracting business? Get listed free →

Common questions

How much does a dock cost on the St. Johns River?

A new residential dock commonly runs $15,000–$40,000 or more, depending on length, water depth, decking material, and whether you add a boat lift or covered boathouse. Longer runs out to navigable water and premium materials raise the price. Get a local marine contractor's quote.

Do I need a permit to build a dock or seawall in Putnam County?

Yes. Waterfront construction on the St. Johns and connected waters typically requires an Environmental Resource Permit from the St. Johns River Water Management District, and often authorization from the U.S. Army Corps of Engineers, plus county sign-off. A licensed marine contractor manages this.

How much does a seawall cost?

Seawalls are usually priced per linear foot and vary widely with height, materials (vinyl, concrete, rip-rap), and site access. Because they're engineered to hold back water and soil, they're a specialized job — get quotes from marine contractors, not general builders.

How long does dock or seawall permitting take?

Waterfront permitting can take weeks to a few months depending on the scope and agencies involved. Build the timeline into your plans, and let an experienced local marine contractor handle the paperwork.