Florida runs on a single, statewide building code, unusual in itself, most states let cities and counties adopt their own. But the code being uniform doesn’t mean the process is. Every county and city still runs its own building department, its own forms, and its own interpretation of the gray areas, which is where most of the real complexity actually lives.

Short version: The Florida Building Code applies everywhere, but permits are issued and enforced locally, so the process looks different county to county even though the underlying rules don’t. Most structural work, additions, decks over 30 inches high, sheds with electrical or a permanent foundation, needs a permit regardless of size. Florida does allow homeowners to act as their own general contractor under a real legal exemption, but it comes with a signed liability disclosure, restrictions on hiring unlicensed help, and a one-year no-sale rule, not a loophole around regulation.

One code, enforced locally

The Florida Building Code is developed and maintained at the state level, through the Department of Business and Professional Regulation, and it applies in every jurisdiction from the Panhandle to the Keys. What varies locally is enforcement: each county or city building department reviews plans, issues permits, and schedules inspections on its own timeline and with its own forms, and local governments can add stricter flood or wind requirements on top of the state minimum, though they generally can’t weaken it. Practically, this means the rules for what you’re allowed to build are consistent, but the experience of actually getting a permit approved in Orange County looks different from Osceola or Seminole.

What actually needs a permit

As a rule of thumb, if it involves structure, electrical, plumbing, mechanical systems, or gas work, it needs a permit, and Florida’s thresholds for “small” projects are often stricter than what people expect coming from other states. Sheds: the state exempts structures up to 120 square feet from certain product-approval and wind-borne debris rules, but local permit thresholds are frequently lower, commonly 100 to 200 square feet, and any shed with electrical, plumbing, or a permanent foundation needs a permit regardless of size. Decks: any deck 30 inches or more above grade needs a permit and engineered drawings from a licensed Florida engineer or architect, statewide, with only narrow local exceptions for very small ground-level decks. Fences: most jurisdictions allow a standard 6-foot fence in side and rear yards without a permit and cap front-yard fences around 4 feet, but this is locally enforced and worth confirming directly rather than assuming. One statewide trigger worth knowing regardless of project type: any project valued over $5,000 requires a recorded Notice of Commencement before work begins, a real property law requirement tied to Florida’s construction lien statute, not just a building department formality.

Why wind runs through almost everything

This is the piece that surprises people relocating from elsewhere: Florida’s wind-load requirements, tied to the Florida Building Code’s ASCE 7 standard, apply to structures that would be exempt from any real engineering review in most other states. The same wind-engineering logic covered in solar panel installations applies to a shed, a deck, or a fence. It’s a meaningful part of why a small backyard project here often needs a stamped engineering drawing that the equivalent project elsewhere wouldn’t.

The owner-builder path, and what it actually covers

Florida Statute 489.103(7) lets a property owner act as their own general contractor on their own one- or two-family residence, without holding a contractor’s license, as long as it’s for your own occupancy and you’re not building it for sale or lease. It’s a real, legal, commonly used exemption, not a workaround. What it doesn’t cover: electrical, plumbing, and mechanical work generally still require separately state-licensed trade contractors regardless of your owner-builder status, those are their own license categories under Florida law, independent of the general contractor exemption. Structural work still needs drawings from a licensed engineer or architect before a permit gets issued. In practice, owner-builder usually means you’re the general contractor and can do meaningful hands-on work yourself, while the specialty trades and anything structural still route through licensed professionals either way.

The part that’s easy to underestimate: personal liability

To use the owner-builder exemption, you have to personally sign a disclosure statement acknowledging that you’re the responsible party of record on the permit, and it says plainly that if an unlicensed worker gets hurt on your project, you can be held personally and financially liable, a risk that’s easy to not fully register until it’s relevant. You’re also prohibited from hiring an unlicensed person to act as your contractor or supervise other workers, it’s specifically written to prevent someone using your name and exemption as a shield. And there’s a one-year rule: if the home is sold or leased within a year of completion, the law presumes you built it for resale rather than your own use, which violates the exemption and exposes you to unlicensed-contracting liability after the fact.

Inspections and getting to a Certificate of Occupancy

Once a permit is issued, owner-builder or licensed contractor, the process is identical: inspections are scheduled at required stages (commonly footing, framing, rough-in electrical and plumbing, and final), each has to pass before work continues, and the project isn’t considered legally complete until the building department issues a Certificate of Occupancy or Certificate of Completion. Skipping or failing an inspection doesn’t just risk a fine, it means the work isn’t legally recognized as done, which matters enormously later.

Why this matters even if you’re not building anything

If you’re buying a home, unpermitted work by a previous owner becomes your problem the moment you close. Title searches and the closing process routinely surface permit history, and an unpermitted addition or renovation can delay or derail a sale entirely, tie directly into what’s covered in closing costs and the home inspection checklist. It also affects insurance: coverage can be denied or a claim reduced if damage involves unpermitted work that didn’t meet code, particularly around wind and flood requirements. If you’re evaluating a home with a suspicious addition, sunroom, or converted garage, a quick call to the county building department to check permit history is worth doing before you’re under contract, not after.

Sources:
https://permitsguide.com/florida
https://pinelandengineering.com/learn/florida-permitting/owner-builder-exemption-florida/
https://permitsguide.com/deck/florida