Florida Hurricane Building Code 2026: HVHZ and Wind Mitigation

Florida hurricane building code is the strictest in the United States. Since the 2002 update post-Hurricane Andrew (and refinements after every major storm since), Florida has required new homes to be built to specific wind-load, impact-resistance, and structural standards that drive both safety and insurance discounts. If you are building a new home in Florida in 2026, the code requirements add 5–10% to your construction budget — but they also earn the strongest possible wind mitigation discounts on home insurance, and they save lives in actual hurricanes.

This guide breaks down exactly what the Florida hurricane building code requires in 2026, the High Velocity Hurricane Zone (HVHZ) rules in Miami-Dade and Broward, the wind speed map, the inspection process, and the insurance benefits.

Why Florida has the strictest building code in the US

In 1992 Hurricane Andrew flattened parts of South Florida, killing 65 people and causing $27 billion in damage. The post-Andrew investigation revealed that many failures were due to inadequate building practices — poor roof attachment, untrained framers, weak wall connections. The 2002 Florida Building Code was the response, and it has been refined after every major Florida hurricane since.

The result: a Florida home built to current code performs dramatically better in a hurricane than a home built before 2002. The Insurance Institute for Business and Home Safety (IBHS) data shows post-2002 Florida homes have 60-80% less wind damage in equivalent storms.

Florida wind zones and design speeds

The Florida Building Code uses ASCE 7 wind speed maps that divide the state into design wind speed zones:

Wind zone	Design wind speed	Counties (typical)
Coastal A (HVHZ)	175+ mph	Miami-Dade, Broward
Coastal B	150-170 mph	Monroe, Palm Beach, parts of southwest FL
Coastal C	140-150 mph	Most coastal Florida counties
Inland A	130-140 mph	Inland central Florida
Inland B	120-130 mph	North Florida inland

Higher design speed = stricter requirements = higher build cost. Your structural engineer designs the home to the wind speed required for your specific lot.

High Velocity Hurricane Zone (HVHZ)

Miami-Dade and Broward counties have an even stricter version of the code: the High Velocity Hurricane Zone (HVHZ). Requirements unique to HVHZ:

• 175+ mph design wind speed (highest in the country)
• Impact-rated windows and doors required (or shutters/panels for every opening). Plywood is NOT acceptable.
• Miami-Dade NOA approval on all windows, doors, roof systems, garage doors, and exterior products. The Notice of Acceptance is a Miami-Dade certification that the product was tested to the HVHZ standard.
• Continuous load path engineering from roof to foundation
• Stricter inspection requirements at multiple build stages

Building in HVHZ adds about 10-15% to construction cost vs the same home in inland Florida. It also dramatically reduces hurricane damage and earns the strongest insurance discounts.

Key Florida hurricane code requirements (2026)

• Roof structure: Engineered trusses with hurricane straps connecting trusses to walls (Simpson Strong-Tie or equivalent). 8d nails on close spacing for sheathing attachment. Secondary water resistance (peel-and-stick membrane) under roof shingles.
• Roof shape: Hip roofs perform better than gable in high wind. Gable end walls require additional bracing.
• Roof covering: Wind-rated shingles, metal roofing, or tile. Specific wind ratings required for the design wind zone.
• Wall framing: Continuous load path from roof to foundation. Hold-down anchors at corners.
• Exterior cladding: Wind-rated siding or stucco. Concrete block construction is most common in coastal Florida.
• Windows and doors: Impact-rated glass OR shutters/panels protecting every opening. In HVHZ, impact glass is required (no shutter alternative for some product types).
• Garage doors: Wind-rated, reinforced, with bracing kit. Garage door failure is a common path for hurricane damage to enter a home.
• Foundation: Engineered slab with proper rebar and tie-down points. Coastal homes may require pilings or stem walls.
• Soffits and fascia: Wind-rated, properly attached. Soffit failure lets wind into the attic and lifts the roof.

Cost impact on your Florida build

The hurricane code adds about 5-10% to total construction cost for a typical inland Florida home, and 10-15% for HVHZ (Miami-Dade and Broward) builds.

Code-driven cost	Inland Florida	HVHZ (Miami-Dade/Broward)
Impact-rated windows (3,000 sq ft home)	$15,000-$25,000 (or shutters $5k-$10k)	$25,000-$45,000 (no shutter alternative for many)
Engineered roof structure with straps	$3,000-$5,000	$5,000-$8,000
Secondary water resistance	$1,500-$3,000	$1,500-$3,000
Wind-rated garage door	$800-$1,500	$1,500-$2,500
Wind-rated soffits and fascia	$1,000-$2,000	$1,500-$3,000
Engineered foundation (coastal)	$2,000-$5,000	$3,000-$8,000
Total code-driven add-on	$23k-$41k	$37k-$70k

Insurance benefits of building to current code

Here is the financial payoff: a new Florida home built to current code with all wind mitigation features earns the strongest possible insurance discounts. Typical savings on a $400,000 new home in coastal Florida:

Wind mitigation feature	Premium reduction
Roof shape (hip)	15-25%
Roof deck attachment (8d close-spaced nails)	5-12%
Roof-to-wall connection (hurricane straps)	10-20%
Secondary water resistance	3-8%
Opening protection (impact glass)	15-30%
Combined typical discount	30-45%

On a $400,000 home with typical Florida coastal premium of $7,000/year, a 35% wind discount saves $2,450/year. Over 20 years that is $49,000 in insurance savings — more than enough to offset the $30,000-$40,000 in code-driven build costs.

The Florida hurricane code inspection process

1. Permit application with structural drawings stamped by a licensed engineer
2. Foundation inspection before slab pour
3. Framing inspection after walls and roof framing complete
4. Sheathing/dry-in inspection with secondary water resistance verification
5. Window installation inspection verifying impact rating or shutter installation
6. Wall insulation/drywall inspection
7. Final inspection with all systems operational and code compliant
8. Wind mitigation inspection (separate, by certified inspector) to qualify for insurance discounts

Failing any inspection means re-work. Hire a builder with documented Florida hurricane code experience.

Frequently asked questions

What is the Florida hurricane building code?

The Florida Building Code is the strictest in the US for hurricane resistance. It requires engineered roof structures with hurricane straps, impact-rated windows or shutters, wind-rated cladding and doors, and continuous load path engineering from roof to foundation. Updated regularly since the 2002 post-Hurricane Andrew rewrite.

What is HVHZ in Florida?

The High Velocity Hurricane Zone covers Miami-Dade and Broward counties. HVHZ has the strictest version of the code with 175+ mph design wind speeds, mandatory impact-rated windows with Miami-Dade NOA approval, and stricter inspection requirements.

How much does the hurricane code add to building cost?

About 5-10% in inland Florida and 10-15% in HVHZ (Miami-Dade/Broward). For a typical 3,000 sq ft home, that is $23,000-$70,000 in code-driven costs.

Are impact windows required in Florida?

Required in HVHZ (Miami-Dade and Broward). In other Florida counties, impact windows OR shutters/panels protecting every opening are required. Plywood is acceptable in some non-HVHZ areas as a temporary measure but not as code-compliant permanent protection.

How much insurance can I save with Florida wind mitigation?

Combined wind mitigation features can save 30-45% off the windstorm portion of your premium. On a $400k coastal home with $7,000/year premium, that is about $2,450/year in savings.

Do new construction homes earn automatic insurance discounts?

Yes — but you still need a wind mitigation inspection (separate from the building inspection) to document the features and submit them to your insurer. The inspection costs about $125 and the discounts apply for 5 years.

Is Florida hurricane code worth the extra cost?

Yes. Insurance savings typically cover the extra build cost within 12-15 years. Plus the home performs dramatically better in actual hurricanes — fewer claims, less damage, safer for occupants.