Complete window requirements for America's southernmost city. Navigate Historic District (HARC) guidelines alongside HVHZ compliance for Old Town, New Town, and waterfront properties.
Compare window requirements by area within Key West.
HARC regulated
Standard HVHZ
Maximum exposure
Key West Historic District (Old Town) requires HARC approval for window changes. Windows must maintain historic appearance while meeting HVHZ requirements. Simulated divided lites, traditional profiles, and appropriate colors are often required. Impact-rated windows are available that meet both historic and hurricane requirements.
Yes, but they must meet HARC (Historic Architectural Review Commission) guidelines. Several manufacturers produce impact windows with traditional profiles, simulated divided lites, and period-appropriate hardware that satisfy both HVHZ requirements and historic preservation standards.
Key West windows must be designed for 180+ mph wind speeds as the entire city is in the HVHZ. Design pressures typically range from +65/-75 PSF for inland areas to +85/-100 PSF for waterfront properties with Exposure D conditions.
Yes, New Town does not have HARC restrictions, allowing more flexibility in window styles. However, both areas require HVHZ-compliant impact windows or shutters. New Town projects can use standard aluminum frames while Old Town often requires traditional wood-look or period-appropriate designs.
PE-stamped calculations with HARC compatibility guidance for your Key West property.
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