Collier is our home county because the firm was born here — Naples 2002, online 2006
WindLoadCalc.com was created in Naples, Florida in 2002 as a local wind load service for Collier County architects and engineers — same year ASCE 7-02 came out. We spent four years doing wind load engineering for the Naples market before launching the online calculator and selling it as a product in 2006, eleven years before SkyCiv was founded in Sydney in 2013 (and seven years before SkyCiv's online tool ever existed). Naples and Marco lanai builders, pool cage shops, raised-lanai specialists, custom-home GCs, and plan reviewers at Collier Growth Management have been working from our reports for 24 years (online for nearly 20). Collier County is our home market because that's where the firm started.
Collier sits at the southwest tip of mainland Florida — the warm-water funnel where Gulf hurricanes spin up and load themselves with energy just offshore before crashing into Marco Island, Naples Bay, and points north. Donna 1960, Wilma 2005, Irma 2017, Ian 2022 — four named landfalls that all delivered Category 3 or stronger sustained winds somewhere inside the county line during the lifetime of this calculator. That storm record is why the county runs a 170 mph design wind speed — 10 to 20 mph above the unmodified ASCE 7-22 map for the rest of southwest Florida — and why every Collier permit submittal needs a wind load report that knows the override is there before you start typing.
This is the Collier-specific landing for WindLoadCalc. Punch any Collier ZIP into the form above — Old Naples 34102, Park Shore 34103, Vanderbilt 34108, Pelican Bay, East Naples, Lely, Golden Gate City, Golden Gate Estates 34117/34119, Marco Island 34145, Immokalee 34142, the 10,000 Islands ZIPs around Everglades City and Chokoloskee — and the calculator launches with the right county designation, the 170 mph Risk Category II wind speed, the Partially Open enclosure type for lanai work, and the FBC 8th Edition pressure procedures Naples plan reviewers expect to see on the cover sheet.
Collier is NOT in the HVHZ — and the calculator knows the difference
The most common imported-from-Miami mistake on Collier permits is treating the project like it sits in the High Velocity Hurricane Zone. It doesn't. HVHZ is a Florida Building Code carve-out that legally covers only Miami-Dade and Broward — the two southeast counties. Collier accepts the statewide Florida Product Approval (FL#) pathway for windows, doors, shutters, and roofing. Miami-Dade NOA stamps are accepted in Collier (many manufacturers carry both an NOA and a matching FL#) but they are never required, and there is no TAS 201/202/203 testing mandate. The wind speed is still serious — 170 mph — but the legal product approval document a Collier plan reviewer wants to see on each opening is the FL#.
The four hurricanes the calculator has lived through with Collier
- Hurricane Donna — September 10, 1960: Cat 4 landfall near Marco Island and Naples. Predates the calculator by 42 years but established the storm climatology the modern Collier code is calibrated to.
- Hurricane Wilma — October 24, 2005: Cat 3 winds across central Collier. WindLoadCalc had been online for 3 years when Wilma hit. Post-storm code revisions on soffit, roof cover, and opening protection got folded into the calculator over the following code cycle.
- Hurricane Irma — September 10, 2017: Cat 4 landfall on Marco Island with sustained winds near 130 mph and gusts above 140 mph. Significant lanai, screen enclosure, and roof covering damage even on relatively new construction. The post-Irma plan-review tightening at Collier Growth Management showed up in the calculator within months.
- Hurricane Ian — September 28, 2022: Cat 4 landfall in adjacent Lee County with Cat 3 sustained on coastal Collier plus a 5-7 ft storm surge along Naples Bay, Marco, and Goodland. Drove the next round of Collier-specific lanai and ground-floor-elevation tightening, all of which the calculator now applies on every Collier ZIP.
Collier Wind Speed Quick Reference (Every ZIP, Same 170 mph)
Because Collier sets its design wind speed at the county level rather than the ZIP level, every address inside the county uses the same 170 mph baseline for Risk Category II construction. What changes between Marco Island and Immokalee is the exposure category — and that one input swings calculated pressures 15 to 25 percent at the same 170 mph wind speed. Gulf-front Marco and beachfront Naples ZIPs typically calc as Exposure D (open water within one mile upwind); inland Estates and Immokalee almost always run Exposure C. The table below maps the Collier residential ZIPs we see most often on submittal cover sheets.
| City / Area | ZIP | Risk Cat II Wind Speed | Typical Exposure |
|---|---|---|---|
| Old Naples / Downtown | 34102 | 170 mph | D near Gulf, C otherwise |
| Park Shore / Moorings | 34103 | 170 mph | D coastal, C inland |
| North Naples / Vanderbilt Beach | 34108 | 170 mph | D coastal, C inland |
| East Naples / Lely | 34112, 34113 | 170 mph | C |
| Golden Gate Estates (east) | 34117, 34119 | 170 mph | C |
| Marco Island | 34145 | 170 mph | D (Gulf-exposed) |
| Immokalee | 34142 | 170 mph | C (inland) |
| Everglades City / Chokoloskee | 34139, 34138 | 170 mph | D (10,000 Islands) |
The exposure column is the typical case — not a guarantee
Exposure D applies when there is open water within one mile upwind for the wind sector being analyzed. A Naples bayside house may calc as Exposure D from the west (Gulf) but Exposure C from the east (mainland). Risk Category III (assembly, schools above the size trigger) and Risk Category IV (NCH Naples Hospital, Physicians Regional, Collier EOC, fire stations) push the wind speed higher than 170 mph at the same address. Always run the calculator on your project's actual address and occupancy before specifying products or sizing frames.
Collier Permit Reality — Growth Management, FL# Database, and the CCCL
Collier residential and commercial permits route through the Collier County Growth Management Department in Naples (2800 N. Horseshoe Drive), with separate plan review desks at the City of Naples and the City of Marco Island for projects inside those municipal boundaries. The wind load standard is the Florida Building Code 8th Edition (2023), which references ASCE 7-22; the Collier County Land Development Code handles zoning, setbacks, and accessory-structure dimensions that gate the permit even if they don't change the wind numbers.
A few Collier-specific items worth knowing before you submit a Naples or Marco package:
- Windborne Debris Region — all of Collier. Every glazed opening in new construction and substantial renovations must be protected. Impact-rated windows and doors (large missile impact per ASTM E 1996 / E 1886), accordion or roll-down shutters, panel shutters, or — under the FBC alternate provisions — plywood at prescribed thickness and fastener pattern. There is no opt-out anywhere inside the county line.
- FL# pathway, not NOA. Each window, door, shutter, and roofing assembly carries a current Florida Product Approval number, looked up in the Florida Building Commission database. The WindLoadCalc report names the design pressure per opening so the contractor can match a compliant FL# unit. Miami-Dade NOAs are accepted in Collier when the product also carries an FL# (which most quality products do); a Miami-only NOA without an FL# is not legal to install in Collier.
- Coastal Construction Control Line (CCCL). Beachfront parcels on Naples beaches and Marco's Gulf side may sit seaward of the Florida CCCL, which stacks a separate Florida Department of Environmental Protection (FDEP) permit on top of the county building permit. CCCL parcels almost always calc as Exposure D and may need Risk Category bumps on primary frame elements depending on the use.
- Lanai and pool cage volume. Lanais, pool cages, screen enclosures, and raised lanais are the highest-volume permit type in Collier — and the scope where the ASCE 7-22 Partially Open enclosure classification (introduced in ASCE 7-22, did not exist in 7-16) matters most. WindLoadCalc applies the correct GCpi = ±0.18 on every Collier lanai run; screen mesh selection (typical 18x14 fiberglass, 17x20 vinyl-coated, or 20x20 hurricane mesh) sets the panel pressure rating, and the C&C report sizes the aluminum frame members and footing.
- Florida's 4-foot minimum edge strip "a" — Collier plan reviewers do check. FBC R301.2(7) sets a 4-ft minimum for the C&C zone edge-strip dimension on Florida residential, larger than the 3-ft ASCE 7-22 default used elsewhere in the country. A submitted report that quietly uses the 3-ft minimum on a Naples lanai is one of the more common first-cycle Collier corrections. WindLoadCalc applies the 4-ft Florida minimum automatically for every Collier ZIP — you don't have to remember.
PE stamps for Collier projects — the home-market advantage
Our P.E. is Florida-licensed and works in Collier. The license scope is Florida residential and small commercial up to 3 stories — which means PE sign-and-seal is available for essentially every Collier residential scope by volume: every Naples lanai, every Marco Island pool cage, every raised lanai, every screen enclosure, every window-and-door replacement, every accessory structure, every single-family custom home, every two-story townhouse, and almost every multifamily building short of the high-rise condo tier.
Stamp turnaround on Collier projects typically runs inside one business day. Most Naples lanai and window-replacement scopes come back same-day. We've sealed Collier work for repeat customers from Ron Piggott's raised-lanai class of project down to single-window opening protection retrofits.
FBC 8th Edition + ASCE 7-22 — What Changed for Collier
The Florida Building Code 8th Edition (2023) took effect statewide on December 31, 2024. The most consequential change for Collier residential work is the underlying ASCE reference: FBC 8th adopts ASCE 7-22 in place of ASCE 7-16, which brings new wind speed maps, a reorganized Chapter 30 for Components and Cladding, and — critically for Naples lanai design — a brand-new enclosure classification.
The single most consequential ASCE 7-22 change for Collier lanai design is the new Partially Open enclosure type. Pre-2022, a screened Naples lanai got classified as Open or Partially Enclosed, and the internal pressure coefficient (GCpi) came out as either 0 or ±0.55 — neither of which matched what a screen mesh actually does to internal pressure during a storm. ASCE 7-22 finally introduced the fourth category, Partially Open, with GCpi = ±0.18 — a coefficient that matches observed behavior. Every Collier lanai we run on the modernized calculator uses this classification, and the resulting numbers are noticeably more rational than what the same project would have returned under the 2017 code.
Other ASCE 7-22 shifts that show up on Collier projects:
- Chapter 30 reorganization. The C&C flow now branches cleanly across six roof geometries (gable, hip, monoslope, multispan, sawtooth, stepped). WindLoadCalc handles all six and selects the right procedure based on roof shape entered.
- Expanded roof zones for hip and gable. ASCE 7-22 reshaped the field, edge, and corner zone geometry on hip and gable roofs — the most common Collier residential shapes. The pressure distribution across the roof is meaningfully different than the same project would have generated under 7-16. Naples plan reviewers working under FBC 8th expect to see 7-22 zones on the report.
- Continuous load path requirement carries forward. FBC 8th continues to require a documented continuous load path from roof panel through ridge, rafter, wall, sill, anchor, foundation. The calculator output names the design pressures at each link in that chain.
- Risk Category framework unchanged. The Risk Category I/II/III/IV multipliers on wind speed are conceptually identical to ASCE 7-16; what changed is the underlying map and (for Collier) the 170 mph override that sits on top of it.
WindLoadCalc has been updated end-to-end to ASCE 7-22 and FBC 8th Edition for every Florida project, with the 170 mph Collier override applied automatically on every Collier ZIP we recognize — which is all of them.
Why Collier Sits at 170 mph (and the Rest of SW Florida Doesn't)
Run an unmodified ASCE 7-22 baseline map read across southwest Florida and the contours fall in the 150 to 160 mph range for Risk Category II from Sarasota down through Lee and Charlotte. Collier alone gets pushed to 170 mph. The reason isn't abstract conservatism — it's observed building performance during the four named storms above, plus the broader Gulf climatology that puts Collier at the high-water-temperature end of the southwest Florida coast where every passing hurricane spins up more energy in the last 50 miles before landfall than the ASCE map can fully capture.
Because the override is set at the county level, it applies uniformly across every Collier ZIP whether the project sits on the beach in Vanderbilt or 25 miles inland in Golden Gate Estates. The WindLoadCalc velocity finder applies the override automatically — there's no toggle, no manual override step, no "is this Lee or Collier" check. Enter a Collier ZIP and you get 170 mph.
Compared to Collier's Neighbors
Collier touches Lee to the north, Hendry to the northeast, Broward to the east, Miami-Dade to the southeast, and Monroe (mainland) to the south. The wind speed and product-approval pattern across those neighbors is not uniform — every county has its own design basis and its own permit reality. The cards below cross-link to the major adjacent calculator pages.
Florida Statewide FBC 8th
Statewide overview spanning the Panhandle (130 mph) through Central Florida, southwest, southeast HVHZ, and the Keys (~180 mph). Start here if your project crosses county lines or you need the full Florida context.
Miami-Dade County HVHZ
Florida's strictest jurisdiction. HVHZ designation requires Miami-Dade NOA approvals and TAS 201/202/203 testing on every opening. Distinct from Collier — different design speed, different product approval pathway, different test standards.
Broward County HVHZ
Same 170 mph design wind speed as Collier but with full HVHZ amendments — Miami-Dade NOA mandatory, not optional. Covers Fort Lauderdale, Hollywood, and Pompano Beach.
Palm Beach County Non-HVHZ
Atlantic coast just north of Broward. Coastal ZIPs at the high end, western ZIPs slightly lower. Not HVHZ, similar product approval pathway to Collier, but east-coast rather than Gulf-coast climatology.
Same 170 mph, very different rules
Collier and Broward both run a 170 mph design wind speed at Risk Category II — and that's where the similarity ends. Broward is HVHZ: Miami-Dade NOA approvals and three specific TAS test standards apply on every opening. Collier is statewide-FBC with the FL# pathway. A product approved for use in Collier (FL# only) is not automatically approved for use in Broward (needs NOA in addition). A product approved for Broward (NOA + matching FL#) is fine for Collier. Always check both the FL# and the local pathway before specifying — even on identical 170 mph numbers, the documentation is different.
Pull 170 mph C&C Pressures for Your Naples or Marco Project
Enter your Collier ZIP, pick risk category, and get a permit-ready Components & Cladding report in under 15 minutes — Partially Open lanai enclosure, FL# match table, 4-ft Florida edge strip baked in.
Start Free TrialHow to Run a Collier County Wind Load — 5 Steps
Type the Collier ZIP — calculator auto-locks 170 mph
Every Collier ZIP — 34102, 34103, 34104, 34105, 34108, 34109, 34110, 34112, 34113, 34114, 34116, 34117, 34119, 34120, 34134, 34138, 34139, 34141, 34142, 34145 — registers as Collier the moment you finish typing. The 170 mph county design wind speed stamps onto the project header before you get to the next field. No "is this Collier" toggle, no manual override, no chance of accidentally pulling the Lee County 150 mph value into a Naples submittal.
Risk Category — what each tier means for Naples projects
For the bulk of Collier permits — custom homes in Pelican Bay, lanai expansions in Old Naples, raised lanais in East Naples and the Estates, multifamily in East Naples and Bonita Springs border — the project is Risk Cat II. Cat III picks up the larger schools, the assembly halls, the larger Marco Island event spaces. Cat IV maps onto NCH Naples Hospital, Physicians Regional, the Collier EOC, and the fire stations across the county. Each step up scales the 170 mph baseline higher.
Set Naples/Marco exposure (D Gulf-front, C inland, B is rare) and building shape
Exposure is the most consequential decision after the wind speed itself. Exposure D applies to beachfront Naples, the western side of Marco Island, and the 10,000 Islands where open water sits within one mile upwind. Exposure C is the default for most suburban and inland Collier sites — Lely, East Naples, Golden Gate City and Estates, Immokalee. Exposure B is rare in Collier — it requires dense buildings or mature tree cover in all eight wind sectors, which essentially never happens outside a few central Naples downtown blocks. Building footprint, mean roof height (lanais often calc out at 10-12 ft, custom homes 18-24 ft), roof pitch X-in-12, and roof shape complete the input — the calculator picks the right Chapter 30 procedure from there.
Read the Zone 5 corner pressure — that's the window-spec number
Output goes both ways: MWFRS pressures size the structural frame; C&C pressures size every screen panel, lanai column, window, door, and roof element. For Naples lanais (the highest-volume Collier scope) the report includes the ASCE 7-22 Partially Open enclosure pressures with GCpi = ±0.18 already baked into the screen-and-frame numbers. Zone 5 wall corner usually governs window selection and FL# matching; Zone 3 roof corner usually governs lanai roof panel pull-out and is the value that wins arguments with the screen vendor about which mesh and which frame spacing to use.
Export, hand to plan review — and request the PE stamp if needed
The report exports as PDF, Excel, or the architectural schedule .xlsx that drops directly into AutoCAD. For Collier residential projects up to 3 stories — which covers essentially all single-family work, most multifamily, every lanai, every pool cage, every screen enclosure, and every window-and-door replacement — you can request a PE sign-and-seal from our Florida-licensed engineer at submittal time. Stamp requests on Collier projects are typically turned around inside one business day; most Naples lanai and window-replacement scopes come back same-day.
Collier County Wind Load FAQ
How does WindLoadCalc know Collier County so well?
Is Collier County in the HVHZ?
What is the design wind speed in Naples, Florida?
Why does Collier sit at 170 mph when the rest of SW Florida is lower?
Can WindLoadCalc PE-stamp a Collier County project?
What is the wind load requirement for a Naples lanai or pool cage?
Are storm shutters required in Collier County?
Naples vs Marco Island — does the calculation actually change?
Does Collier require Miami-Dade NOA products?
Florida sibling-county and lanai-engineering resources
From Old Naples to Immokalee — the Collier Calculator in 15 Minutes
170 mph ASCE 7-22 + FBC 8th Edition wind pressures for any Naples, Marco Island, or unincorporated Collier ZIP. Built by the people who've been running Collier numbers since 2002. Free 7-day trial. No credit card.
View Plans & Start Trial