Impact Window Requirements
by Florida County
Lee, Collier, and Charlotte each have different wind speed thresholds and code requirements. Here’s your county-by-county breakdown.
At a Glance
County Requirements Overview
| County | Wind Zone | Min. Design Pressure | HVHZ Required? |
|---|---|---|---|
| Miami-Dade | 170+ mph | DP-50+ | Yes — Full HVHZ |
| Collier | 150 mph | DP-35+ | Coastal areas only |
| Lee | 140 mph | DP-30+ | Coastal areas only |
| Charlotte | 130 mph | DP-25+ | No, but recommended |
Miami-Dade
Wind Zone
170+ mph
Min. Design Pressure
DP-50+HVHZ Required?
Yes — Full HVHZ
Collier
Wind Zone
150 mph
Min. Design Pressure
DP-35+HVHZ Required?
Coastal areas only
Lee
Wind Zone
140 mph
Min. Design Pressure
DP-30+HVHZ Required?
Coastal areas only
Charlotte
Wind Zone
130 mph
Min. Design Pressure
DP-25+HVHZ Required?
No, but recommended
* Requirements vary by specific location within each county. Coastal and HVHZ designations depend on your exact address. Always verify with your local building department.
County Breakdown
What This Means for Your County
Miami-Dade County
Strictest in the U.S.The most stringent requirements in the US. All products must be HVHZ rated and carry Miami-Dade NOA. No exceptions.
Collier County
Coastal RequiredCoastal Collier (Naples, Marco Island) requires impact products for all openings. Inland areas may allow shutters with standard windows.
Lee County
Coastal RequiredFort Myers Beach, Cape Coral waterfront, and Bonita Springs coastal require impact glass. Most of Lee County strongly benefits from impact products.
Charlotte County
RecommendedImpact windows are not legally required in most of Charlotte County, but are highly recommended given storm history and insurance premium impacts.
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