Hometown number, hometown calculator. The same 170 mph value applies from the Gulf shore at Marco Island to the agricultural inland of Immokalee — we have been writing wind load reports against that target since the firm started in Naples in 2002.
Calculating wind loads since 2002, online since 2006.
Collier's basic wind speed is 170 mph for Risk Category II buildings, written into Florida Building Code R301.2(7) and applied without amendment by Collier County Growth Management, the City of Naples Building Department, and the City of Marco Island Building Services. That value covers single-family homes, the bulk of golf-community villas in places like Pelican Bay and Lely Resort, and most commercial structures permitted from US 41 east to State Road 29.
Unlike Broward and Miami-Dade, Collier is not a High-Velocity Hurricane Zone county. HVHZ status is reserved for the southeast corner of the peninsula by FBC Section 1620, so the missile-impact testing protocols (TAS 201/202/203) and the Miami-Dade NOA requirement do not apply to Collier permits. What Collier does inherit is the FBC R301.2(7) wind speed table, which sets the same 170 mph design value but routes product approval through standard Florida Product Approval listings rather than the HVHZ subset.
This is the foundational input for ASCE 7-22 Equation 26.10-1, where it gets squared and combined with Kz, Kzt, Kd, Ke, and the appropriate pressure coefficients. The basic wind speed enters the equation as 170, fixed; everything else is a per-project judgment about height, exposure, topography, and building geometry.
Pre-filled to Naples (34102). Type any Collier ZIP or switch the risk category and the result appears below, with the FBC R301.2(7) citation your plan reviewer is going to look for on the cover sheet.
Notice that Risk Cat IV (essential facilities) jumps to 190 mph — ten mph higher than Broward's Risk Cat IV value, even though both counties share the 170 mph Risk Cat II number. That reflects the steeper consequence-of-failure premium the Collier table builds into hospitals, EOCs, and shelters along the southwest hurricane corridor.
The 170 mph value covers every populated ZIP inside county limits, from beachfront Marco Island to the inland farming communities around Ave Maria and Immokalee. Population centers are shown below; outlying ZIPs in eastern Collier (Big Cypress, Ochopee, Everglades City) also resolve to 170 mph.
| City | Primary ZIP | Wind Speed (Cat II) | Typical Setting | Reference |
|---|---|---|---|---|
| Naples (downtown) | 34102 | 170 mph | Coastal · Gulf exposure | FBC R301.2(7) |
| Marco Island | 34145 | 170 mph | Barrier island · Gulf exposure | FBC R301.2(7) |
| Immokalee | 34142 | 170 mph | Inland agricultural (~35 mi) | FBC R301.2(7) |
| Golden Gate | 34116 | 170 mph | Inland suburban (~8 mi) | FBC R301.2(7) |
| Ave Maria | 34142 | 170 mph | Inland planned community | FBC R301.2(7) |
Hurricane Irma (September 10, 2017) made its second Florida landfall on Marco Island as a Category 3 storm, with the eye coming ashore at roughly 3:35 PM EDT. The eyewall passed over Naples within ninety minutes, and the Naples Municipal Airport anemometer recorded a 142 mph gust before the instrument failed. Reconstruction analyses by the National Hurricane Center placed sustained winds in the 110-115 mph range along the Naples coast with gusts to 145 mph in the strongest squall lines. Post-Irma damage surveys produced a striking pattern: homes permitted after the 2002 FBC adoption — designed to the 170 mph target — held envelope integrity, while pre-1994 housing stock saw widespread roof and gable failures.
Hurricane Ian (September 28, 2022) tracked north of Collier and made its primary Cat 4 landfall at Cayo Costa in Lee County, but the storm's expansive southern eyewall scraped the Naples coast and pushed a record 7.26 ft surge into Naples Bay. Sustained winds at Marco Island peaked near 100 mph with gusts to 130 mph. Ian validated the 170 mph design speed in a different way than Irma did: it was the surge, not the wind, that caused most of the structural loss in Naples, but post-2002 buildings above the BFE again came through the wind loading intact.
Hurricane Wilma (October 2005) crossed the state from Cape Romano into Collier as a strong Cat 2 before exiting the east coast, and Hurricane Donna (September 1960) made landfall just south of Naples as a Cat 4 with 145 mph sustained winds — the storm that put southwest Florida on the modern hurricane map and arguably justifies every value above 140 mph in the FBC table to this day.
Building permits in Collier come from one of three offices depending on jurisdiction: Collier County Growth Management Division (unincorporated land, including most of East Naples, Golden Gate Estates, Immokalee, and Ave Maria), the City of Naples Building Department (everything inside Naples city limits), and the City of Marco Island Building Services (the island and Goodland). Everglades City operates its own building official as well, though volume there is small.
All four authorities currently enforce the Florida Building Code 8th Edition (2023), which references ASCE 7-22 and incorporates R301.2(7) verbatim. There are no Collier-specific amendments that change the 170 mph design value — what varies is paperwork: Naples requires its own elevation certificate form for coastal properties in the AE and VE flood zones, and Marco Island has a separate seawall and dune permitting process administered through the city engineer.
Local product approval follows the standard Florida Product Approval (FL#) listings published by the Department of Business and Professional Regulation. Plan submissions to any Collier authority should include FL# for every window, exterior door, garage door, and roof covering assembly, along with manufacturer cut sheets demonstrating the design pressure ratings meet or exceed the calculated demands from the 170 mph design value.
Basic wind speed: 170 mph Risk Cat II (FBC R301.2(7))
HVHZ status: Not HVHZ — standard Florida Product Approval applies
Code edition: Florida Building Code 8th Edition (2023), ASCE 7-22 by reference
Permitting authorities: Collier Growth Management, City of Naples, City of Marco Island, Everglades City
Product approval: FL# listings via DBPR
Calculating wind loads since 2002, online since 2006.