Building a Backyard Shed in Florida? Here's What You Actually Need to Know
So you want to build a shed. Maybe you need somewhere to stash the lawnmower and the Christmas decorations. Maybe you're dreaming of a quiet little home office away from the chaos of the house. Either way, before you buy lumber or call a contractor, there's one thing you need to understand.
Florida does not mess around when it comes to sheds.
A lot of homeowners assume that because a shed is small, nobody cares. That's just not true here. Florida has some of the strictest building codes in the country, and for good reason. We get hurricanes. We get high winds. We get flooding. The rules exist to keep your shed from becoming a missile in a storm or a soggy mess after a week of rain.
Here's the catch though. Florida does not have a single, statewide shed permit exemption. The state sets minimum standards, but your city or county is the one actually handing out permits. That means the rules can be wildly different depending on where you live. A shed that's perfectly legal in one county might need a full permit and engineered plans in the next one over.
So let's walk through what you actually need to know.
The First Answer: It Depends on Your County
If you're looking for a quick answer, here it is: Whether you need a building permit for a shed in Florida depends on your local jurisdiction. There is no statewide rule that says "sheds under X square feet are always exempt."
Some Florida jurisdictions exempt certain small sheds. Others don't. The applicable threshold and conditions can differ significantly from one jurisdiction to another. Factors that matter include:
- The shed's size and height
- Whether it's site-built or prefabricated
- Whether it will have electrical or plumbing
- Whether your property is in a flood zone
- Your local zoning code's setback and lot coverage rules
- Your HOA's rules, if you have one
The only way to know for sure is to check with your local building department.
The Number You'll Hear a Lot: 120 Square Feet
If you call around to enough building departments, you'll start hearing the same number come up: 120 square feet.
Many Florida jurisdictions use 120 square feet as a threshold for exempting small detached storage sheds from building permits. For example, the Town of Jupiter's official permit exemption document states that one-story detached tool and storage sheds are exempt from a building permit provided the floor area does not exceed 120 square feet. That's a real, verifiable local rule.
But here's the critical thing: 120 square feet is not a statewide Florida rule. It's a common threshold that many local jurisdictions have adopted, but not all of them have. Some jurisdictions use different numbers. Others don't offer a size-based exemption at all.
So when you hear "120 square feet," treat it as a starting point for your research, not as a final answer.
County-by-County: Real Examples
Since there's no uniform state rule, the best way to understand how this works is to look at actual county and city ordinances. Here are verified examples.
Sumter County: Sheds Under 100 Sq. Ft.
Sumter County's official "When is a Building Permit Required?" page lists "Sheds under 100 Sq. ft" under the heading "ITEMS NOT REQUIRING A PERMIT (RESIDENTIAL ONLY)". This was adopted in October 2025.
Town of Jupiter (Palm Beach County): 120 Sq. Ft. or Less
Jupiter's official document states that one-story detached tool and storage sheds are exempt from a building permit if the floor area does not exceed 120 square feet, though they may still be subject to zoning approval.
Hernando County: 120 Sq. Ft. or Less for Zoning
Hernando County's Ordinance 26-38 (April 2026) updated the rules so that sheds with impervious roof coverings of 120 square feet or less no longer require a zoning permit. But electrical, plumbing, or concrete work still requires applicable building permits.
Seminole County: 200 Sq. Ft. or Less (Kits/Pre-Built)
Seminole County's official HB 803 page lists "Sheds 200 square feet or less purchased through a local hardware store, and built on site as a kit, or pre-engineered/pre-built sheds" as a non-structural exemption. The exemption does not apply to electrical, plumbing, structural work, or flood zone properties.
City of Zephyrhills: 90 Sq. Ft. or Less for Portable Classification
Zephyrhills classifies sheds that are 90 square feet or less as portable, which allows them to be placed with a five-foot setback instead of the standard ten-foot requirement. Only two portable sheds are allowed per lot.
City of Coral Springs: 150 Sq. Ft. Maximum
Coral Springs has a maximum size of 150 square feet for sheds and requires they not exceed the height of the main structure. Sheds must also be screened from view from the street and adjacent properties.
City of Miami Springs: 250 Sq. Ft. Maximum
Miami Springs allows sheds up to 250 square feet, but they cannot exceed 5% of the rear yard area and must be installed on a reinforced concrete slab.
The lesson here is simple: the threshold varies. It could be 90, 100, 120, 150, 200, or 250 square feet depending on where you live. You have to check your specific jurisdiction.
What About HB 803?
Florida's HB 803, which took effect July 1, 2026, created a $7,500 exemption for certain homeowner projects. But this exemption generally does not apply to sheds because the law classifies sheds as "structural work."
Cities like Stuart and Pinecrest have explicitly confirmed that storage sheds are considered structural work under HB 803, meaning the $7,500 exemption does not apply. This is an important distinction that a lot of online articles get wrong.
Why Florida Cares So Much About Wind
If you've ever been through a hurricane, you already know why Florida takes wind seriously. When you apply for a permit for a shed, the plans may need to be reviewed against wind load requirements.
If you're in a coastal area or a high-risk zone, the rules get stricter. Anchoring requirements get tougher. Roof attachment details get more specific. For example, the City of Zephyrhills requires all accessory buildings to be engineered for 110 mph wind load and requires tie-down anchors with specific specifications.
This is also why you'll hear inspectors talk about "vulnerability categories." It's not just bureaucratic jargon. It's the difference between a shed that survives a storm and one that ends up in your neighbor's pool.
Zoning: Where You Put It Matters
Even if your shed is small enough to skip the building permit, you still have to follow zoning rules. Zoning controls where you can put a structure on your property, and it's one of the most common reasons sheds get red-tagged.
The big one is setbacks. Setbacks are the minimum distances between your shed and your property lines. Every jurisdiction has its own numbers. Zephyrhills, for example, requires ten feet from side and rear property lines for standard sheds, and twenty feet from the front setback.
There's also lot coverage. Local governments often limit how much of your lot can be covered by impervious surfaces. If you already have a big driveway and a patio, adding a shed might push you over the limit. In that case, you'd need a variance, or you'd have to reduce other impervious surfaces to make room.
And yes, you should check your HOA rules before you do anything. Even if your shed is perfectly legal under state and local law, your HOA can still prohibit it. Florida courts have confirmed that a building code exemption does not override private deed restrictions or HOA covenants. If you build without HOA approval, you could be looking at fines or even a demand to tear it down.
The Permit Process, Step by Step
If you've determined that your shed needs a permit, here's what the process typically looks like.
Step 1: Verify your zoning. Go to your local city or county planning department website. Look for zoning maps or land development regulations. Confirm your setbacks and lot coverage limits before you do anything else.
Step 2: Check your HOA rules. Review your CC&Rs. If your HOA requires approval, submit your shed design and get it in writing. You might need written approval or architectural/design approval before you start construction.
Step 3: Prepare your plans. For a simple shed, you'll usually need a site plan showing where the shed will go, its dimensions, and the setbacks. For larger or more complex structures, you may need professional architectural drawings. Coral Springs, for example, requires for pre-fabricated sheds either NOAs or State of Florida Product Approvals, and for site-built sheds, plans signed and sealed by a Florida licensed Architect or Engineer.
Step 4: Submit your application. Go to the local building department. Pay the permit fee, which varies by city and by the value of the shed. You may also need to pay for a plan review.
Step 5: Get your inspections. Depending on the project and jurisdiction, inspections may include footing inspection, frame inspection, roofing inspection, and a final inspection. Each one has to pass before you move on to the next stage.
The Foundation Question
Foundation requirements depend on the shed design, construction method, site conditions, and applicable local code requirements. Larger or permitted structures may require an engineered or code-compliant foundation and anchoring system.
Miami Springs, for example, requires that sheds be installed on a concrete slab, 4 inches thick minimum, reinforced with 6x6-10/10 W.W.F., and have a 10 inch x 16 inch minimum thickened edge. That's a specific local requirement, not a statewide rule.
Improper foundations are a common reason for permit denials. If you're not comfortable pouring concrete or building a proper foundation, hire a licensed contractor for that part. It's worth the money.
What About Electricity and Plumbing?
If you want to run power to your shed, you'll need a separate electrical permit. Running an extension cord from your house is generally not allowed for a permanent structure. You'll need a licensed electrician to install a circuit breaker panel in the shed and run conduit underground to your main electrical panel.
Same goes for plumbing. If you're installing a sink or a toilet, you'll need a plumbing permit. This is rare for a standard backyard shed, but it's mandatory if you're building a garden office or a guest house.
Mobile Sheds: Not a Loophole
A lot of people think they can get around the permit process by buying a shed that's designed to be moved. Here's the reality. Even a movable shed may be subject to local zoning, placement, land-use, and accessory-structure regulations. The fact that a structure can be moved does not automatically exempt it from local requirements.
Some jurisdictions have specific rules. The City of Lynn Haven, for example, limits portable storage units to ten days in any 60-day period on residential premises, with dimensions capped at 8 feet wide, 20 feet long, and 9 feet high. If you leave a portable shed on your property beyond the allowed period, you could be in violation.
Mistakes People Make
Let me save you some trouble. Here are the mistakes I see people make over and over again.
Assuming "no permit needed" means "no rules." Just because your shed is small doesn't mean you can put it anywhere. You still have to follow setback rules.
Ignoring HOA rules. Building a shed that violates HOA rules can result in fines, a requirement to tear it down, or even a lawsuit. A building code exemption does not override private covenants.
Hiring a contractor who doesn't pull permits. If a contractor tells you "we'll just do it and you won't hear about it," run. Unpermitted construction can create insurance and property-sale complications, depending on the policy and circumstances.
Assuming 120 square feet is the statewide rule. It's not. It's a common local threshold, but you have to verify what your specific jurisdiction requires.
The Bottom Line
Florida does not have a uniform, statewide shed permit exemption. The answer depends on your county, your flood zone, and your HOA.
Some jurisdictions exempt sheds under 100, 120, 150, 200, or 250 square feet. Some don't offer a size-based exemption at all. The only way to know for sure is to call your local building department.
The smartest thing you can do is call them before you buy anything. Ask specifically about "residential accessory structure" requirements. Ask if your property is in a flood zone. Ask what the size threshold is for a shed permit in your jurisdiction.
It's a lot easier to ask those questions upfront than to tear down a shed you already built.
Quick Answers to Common Questions
Do I need a permit for a shed under 120 square feet?
It depends on your city or county. Some Florida jurisdictions exempt certain small sheds from building permits, but the applicable size threshold and conditions vary. Zoning, setbacks, flood-zone status, construction type, and utilities can also affect the requirements.
Can I build a shed in my front yard?
Most residential zoning codes prohibit storage structures in the front yard. Sheds are typically required to be in the rear or side yards. Zephyrhills, for example, prohibits encroachment within the front setback of twenty feet.
What happens if I build without a permit?
You could get a stop-work order, fines, and a requirement to tear down the structure. Unpermitted construction can also create insurance and property-sale complications, depending on the policy and circumstances.
Does the shed need to be anchored to the ground?
Anchoring requirements vary by jurisdiction and wind zone. Zephyrhills, for example, requires tie-down anchors and metal bands for all outbuildings. Check with your local building department for specific requirements.
Can I use a shed as a home office?
If you're using it as habitable space, the requirements get stricter. You'll likely need a building permit, electrical permits, and possibly plumbing permits.
One Last Thing
Building codes and permit requirements change. What's true today might be different next year. Always verify the specific rules with your local city or county building department before you start construction. And if you're ever in doubt, hire a licensed contractor who knows the local rules. It'll save you a headache down the road.
Disclaimer: This is a private research platform and is not affiliated with any government agency. Building codes and permit requirements are subject to change. Always verify specific rules with your local city or county building department before starting construction.