Deck Permits in Duval, Clay, St. Johns & Nassau: A Plain-English Guide
We build across four counties, and one of the most common sources of homeowner confusion is that the rules aren’t the same in all of them — and people frequently don’t know which one they’re actually in.
Who permits what
Duval County / City of Jacksonville covers Jacksonville proper, including Mandarin, Arlington, the Beaches and San Marco.
Clay County covers Orange Park, Fleming Island, Middleburg and Green Cove Springs. If you’re in Orange Park, you are not permitting through Jacksonville, even though it’s a fifteen-minute drive.
St. Johns County covers Ponte Vedra, Nocatee and St. Augustine.
Nassau County covers Fernandina Beach, Amelia Island, Yulee and Callahan.
Each has its own process, its own forms and its own timelines. This is the first thing we sort out.
When you need a permit
Broadly, and in all four counties: attached decks and elevated decks require a permit and inspection. Anything with a roof — a covered deck, a screened porch, in many cases a pergola — requires a permit and brings wind-load requirements with it.
Small, low, freestanding platforms sometimes fall below the threshold. But the thresholds vary and they change, so guessing is a poor strategy.
Waterfront properties frequently trigger an additional layer: flood-zone elevation requirements, shoreline setback review, and for structures extending into navigable water, potentially state or federal review.
What inspectors actually look at
Having stood next to a lot of inspectors, here’s the real list:
Footings. Correct depth, correct diameter, correct number. They’ll check before you pour and they’ll be unhappy if you didn’t call for that inspection.
Ledger attachment. Through-bolted, not nailed. Properly flashed. This is the one they care most about, and rightly — it’s the leading cause of deck collapse.
Joist spacing and hangers. Correct span for the material, correct hardware, hardware actually rated for contact with treated lumber.
Railing. Height and baluster spacing to code. The spacing rule exists so a child’s head can’t fit through. Older decks routinely fail this.
Stairs. Consistent rise and run, proper railing. Inconsistent stair heights are a trip hazard and a code violation.
None of this is bureaucratic box-ticking. Every item on that list is on it because people have been hurt when it was ignored.
The cost of skipping it
Some contractors offer to skip the permit — it saves fees and weeks, and it’s tempting.
Here’s what you buy: no inspection, meaning nobody independent ever confirmed your deck is safe. A problem at closing when you sell, because unpermitted structures show up. Potential insurance complications if something happens. And no recourse if the work is defective.
The permit is the cheapest insurance policy on the entire project.
HOAs are a separate thing
Worth saying clearly: HOA architectural review is not the same as a county permit, and satisfying one does not satisfy the other. In Nocatee, Fleming Island and much of Ponte Vedra, HOA review is genuinely rigorous and can govern materials, colors and heights.
Both processes run in parallel. Both have to be cleared. We manage both — and we’d much rather design for your HOA’s guidelines from the start than redesign after a rejection costs you a month.
We handle all of it
Drawings, submission, inspections, all four counties. You never stand in a county line. It’s part of every full build we do. Ask us what your specific project is likely to need.
Thinking about a deck project?
Free on-site estimate, real material samples, written itemized quote within 48 hours.
