Renovating an older South Florida home does not force you to bring the whole house up to today’s hurricane code. Specific work does trigger specific upgrades: a roof replacement must improve roof-deck attachment and add a secondary water barrier, larger homes in the wind-borne debris region may need roof-to-wall connections at re-roofing, and a permitted project of $50,000 or more on a home valued at $750,000 or more must add code-level opening protection. Every replacement window, exterior door and shutter needs a permit and an approved product.
Those triggers come mostly from Florida Statutes section 553.844 and the rules the Florida Building Commission adopted under it. In Miami-Dade and Broward, the code’s High-Velocity Hurricane Zone (HVHZ) provisions sit on top. Here is how it works in practice as of 2026.
Which edition of the Florida Building Code applies?
The Florida Building Code, 8th Edition (2023), took effect on December 31, 2023 and is the edition in force as of this writing. The 9th Edition (2026) is still listed as a draft on the state’s building code site.
The edition that governs your project is the one in effect on the date your permit application is filed, and it governs for the life of that permit and any extension (section 553.73). If a new edition is approaching, the date you submit can matter. Ask your contractor which edition the drawings are prepared to.
What the High-Velocity Hurricane Zone means for Miami-Dade and Broward
Miami-Dade and Broward are the two counties covered by the code’s HVHZ provisions, which set stricter structural, roofing and product requirements than the rest of the state. You can see the weight placed on it in Broward’s own administrative amendments: building officials, structural plans examiners and roofing and structural inspectors there must have HVHZ experience, or pass the Board of Rules and Appeals’ HVHZ exam, before they are certified.
For a homeowner, the HVHZ shows up in three places. Products used on the building envelope must carry approvals valid for HVHZ use. Roofing details and inspections are more demanding. And structural work on walls, openings and roof framing is reviewed against HVHZ criteria. A window that is legal in Orlando is not automatically legal in Hollywood or Coral Gables.
Product approvals and Miami-Dade NOAs
Under section 553.842, panel walls, exterior doors, roofing, skylights, windows, shutters, impact protective systems and certain structural components must have product approval before they can be used in construction in Florida. Approval can come through a certification mark or listing, a test report from an approved lab, an evaluation report from an approved entity, or a report sealed by a Florida-registered engineer or architect.
The statute names the Miami-Dade County Product Control Division as one of the approved product evaluation entities, which is why you will see Miami-Dade Notices of Acceptance (NOAs) on window and door submittals in both counties. A statewide approval generally prevents a local jurisdiction from demanding more testing, as long as the product is used within its approval conditions. A building official can still reject a product with a written report showing it is being used outside those conditions.
Two practical points. First, an approval comes with conditions of use, and the product has to be used within them. A good product installed outside its approval is not an approved installation. Second, the statute bars marketing a product as hurricane, windstorm or impact protection unless it is approved. If a seller cannot produce the approval document, do not buy it. Our guide to impact window and door costs in Florida covers pricing.
Roof replacement: what has to be upgraded
Re-roofing is where most older homes meet the hurricane code. Section 553.844 required the Florida Building Commission to adopt mitigation rules for site-built single-family homes, and they apply when you replace a roof:
- Every roof replacement must include a secondary water barrier and must strengthen or correct roof-deck attachment and fastening. Practically, the deck gets re-fastened to current criteria while it is exposed.
- Roof-to-wall connections are required at roof replacement for a home in the wind-borne debris region with an insured value of $300,000 or more (or, if uninsured, a just value of $300,000 or more for property tax purposes).
- The 15% cap. The statute recognizes that full retrofits can be uneconomic. Roof-to-wall connections are not required unless the gable-end or all-corner connections can be completed for 15% of the roof replacement cost. On houses with both hips and gables, gable ends get priority unless the hip is more than 1.5 times as wide as the gable.
- The 25% rule. If the existing roof was built, repaired or replaced under the 2007 code or later, and 25% or more of a roof section is repaired, replaced or recovered, only the affected portion must meet the current code. Local governments cannot change this by ordinance.
In Broward, roof covering maintenance or repair of $1,500 or less is exempt from a permit. Anything larger is permitted work. On a 1960s house like our Hollywood Lake House, where the roof was replaced as part of taking the house back to structure, the deck attachment and water barrier work is not optional, and it should be priced as part of the roof from day one.
Windows, doors and opening protection
Replacing a window, an exterior door or a set of shutters is permitted work in its own right; Broward’s administrative provisions name impact-resistant coverings specifically. Each product needs its approval, and in the HVHZ that approval must cover HVHZ use.
The bigger trigger is less well known. Under section 553.844(3)(c), any project requiring a building permit, applied for on or after July 1, 2008, with an estimated cost of $50,000 or more, on a home in the wind-borne debris region with an insured value (or, if uninsured, a just value) of $750,000 or more, must include opening protection as the code requires for new construction. Routine roof covering repair is excluded. In South Florida, many homes clear $750,000, and a full kitchen remodel alone can pass $50,000. That means a renovation can bring a requirement to protect every opening, not only the ones you planned to touch.
It is far better to find this out at the design stage than at permit review. On whole-house projects like our Dania Beach gut rehab, where every window and door was replaced, the question answers itself. On a kitchen-only project, it can be a large and unplanned addition to the budget. Get your insured value and the property appraiser’s just value before you set a budget.
When a renovation triggers bigger upgrades
The Florida Building Code, Existing Building is the volume that governs repairs, alterations and additions to existing structures, and it scales requirements to the extent of the work. Cosmetic work replaces like with like. Work that removes or reconfigures walls, openings or roof framing brings the new elements, and sometimes the elements they connect to, under current structural and wind criteria. That is why removing a load-bearing wall or enlarging an opening for a glass wall needs engineering, not just a permit drawing.
The largest trigger is flood-related rather than wind-related. If the cost of improvements reaches 50% of the structure’s market value, the building is a substantial improvement and must be brought into full compliance with the flood provisions. Under the Florida Building Code, that means the lowest floor of a dwelling at or above the base flood elevation plus one foot. We cover how that is calculated in our article on the FEMA 50% rule in South Florida, and it is often the single factor that decides between renovating and building new.
How to plan a renovation around hurricane requirements
- Know your numbers first. Insured value, just value and flood zone determine which triggers apply. They take a few minutes to look up and can change the scope by a wide margin.
- Price the roof honestly. If the roof is near the end of its life, re-roofing during the renovation, with deck attachment and a secondary water barrier included, is cheaper than doing it separately later.
- Treat openings as a system. If opening protection is triggered, decide between impact glass and approved shutters for the whole house, not window by window.
- Ask for approvals before you approve the product. Get the product approval or NOA number, the size limits and the anchoring detail before you sign off on a window or door.
- Bring engineering in early. Our founder Yosef trained as a structural engineer, and we look at walls, openings and roof framing before design is fixed. Late structural changes cost more than early ones.
On our Sky Lake House, a new waterfront home that is largely impact glazing, the HVHZ requirements drove the glazing, framing and anchorage from the first drawing. In a renovation, the same thinking applies to whatever you open up. Our home renovation and additions and structural pages explain how we scope that work, and renovating an older Florida home covers the rest of what you tend to find.
Frequently asked questions
Do I have to bring my whole house up to hurricane code when I renovate?
Not automatically. Florida’s triggers are tied to specific work. A roof replacement requires deck attachment upgrades and a secondary water barrier, and sometimes roof-to-wall connections. A permitted project of $50,000 or more on a home insured or valued at $750,000 or more requires code-level opening protection. Crossing the 50% substantial improvement threshold triggers full flood compliance.
What is the High-Velocity Hurricane Zone in Florida?
The HVHZ is the part of the Florida Building Code that applies stricter wind, roofing and product standards in Miami-Dade and Broward counties. Products used on the building envelope must be approved for HVHZ use, and Broward requires its building officials and inspectors to have HVHZ experience or pass an HVHZ exam before certification.
What is a Miami-Dade NOA?
A Notice of Acceptance is a product approval issued by the Miami-Dade County Product Control Division, which state law names as an approved product evaluation entity. Windows, doors, shutters and roofing products used in South Florida typically carry an NOA or a Florida product approval. Ask for the document and check that it covers HVHZ use before you buy.
Are roof-to-wall connections required when I replace my roof?
For a site-built single-family home in the wind-borne debris region with an insured value of $300,000 or more, yes, subject to a cap: they are required only if the gable-end or corner connections can be completed for 15% of the roof replacement cost. Every roof replacement must also improve deck attachment and add a secondary water barrier.
Do I need a permit to replace windows or install shutters?
Yes in Broward, where the administrative provisions name windows, doors and impact-resistant coverings such as shutters as permitted work. In Miami-Dade, confirm with your city’s building department before work starts. Everywhere in Florida, windows, exterior doors and shutters must carry a valid product approval, and the installation has to follow that approval’s conditions.
