Florida Building Code R301.2(7) lets counties adopt wind speeds that supersede the ASCE 7-22 basic wind speed map. Miami-Dade, Broward, and Collier have done so. The rest of the state defaults to the ASCE 7-22 map value at the ZIP centroid. This page is the single source of truth for both.
Calculating wind loads since 2002, online since 2006.
Risk Category II shown in the headline column. The full Risk Category I / II / III / IV breakdown is on each county's dedicated page. Gold-highlighted rows have a verified Florida Building Code R301.2(7) override; blue-highlighted rows use the ASCE 7-22 map value at the county centroid pending FBC verification.
| County | Risk Cat II | HVHZ | Reference | Detail page |
|---|---|---|---|---|
| Miami-Dade | 175 mph | Yes | FBC R301.2(7) override | Miami-Dade detail → |
| Broward | 170 mph | Yes | FBC R301.2(7) override | Broward detail → |
| Collier | 170 mph | No | FBC R301.2(7) override | Collier detail → |
| Monroe (Keys) | ~180 mph | No | ASCE 7-22 Fig 26.5-1B (FBC override pending) | Monroe detail → |
| Lee | map | No | ASCE 7-22 Fig 26.5-1B (FBC override pending) | Lee detail → |
Each county page includes the full Risk Cat I/II/III/IV breakdown, a live ZIP lookup, the hurricane history that shaped the local code, and county-specific FAQs.
High Velocity Hurricane Zone is a Florida Building Code designation that triggers a separate product approval pathway. HVHZ-zoned projects require Notice of Acceptance (NOA) documentation from the Miami-Dade Building Code Compliance Office, plus missile impact testing under TAS 201 (Large Missile), TAS 202 (Forced Entry), and TAS 203 (Air Pressure Cyclic) for every opening protection product.
Only Miami-Dade and Broward counties are HVHZ. Despite higher wind speeds in the Keys (Monroe County) and the post-Andrew origin of the designation, no other Florida county is currently HVHZ-zoned. This is a common misconception worth correcting on every project that imports HVHZ assumptions into non-HVHZ jurisdictions.
ASCE 7-22 is a consensus engineering standard. The Florida Building Code is a legally enforceable code. The relationship between them is straightforward: the 8th Edition of the Florida Building Code (2023) adopts ASCE 7-22 by reference, then layers Florida-specific amendments on top. Section R301.2(7) of the Residential code is where Florida counties get the authority to set a wind speed that exceeds the ASCE 7-22 Figure 26.5-1B map contour value.
When that authority is used — in Miami-Dade, Broward, and Collier counties as of the 2023 FBC edition — the FBC value becomes the legally enforceable design wind speed for permit submission in that county. Designing to the raw ASCE map value alone will fail plan review. When the authority is not used (most other Florida counties), the ASCE 7-22 map value governs, looked up at the project site or the ZIP centroid for a quick check.
Run any Florida ZIP through the free calculator. FBC overrides are applied automatically. Every coefficient cited. No signup, no meter.
Open the free calculator →Calculating wind loads since 2002, online since 2006.