Adopted edition
IRC 2021 (SC amendments)
Inherits from SC state floor.
SC · County
Union County, SC.
Union County is in SC (IECC zone 3A, design wind 100 mph).
Design wind speed
100 mph
ASCE 7 Risk Cat II, 3-second gust at 33 ft. Drives fastener spacing, hold-downs, and opening protection.
Climate zone (IECC)
3A
Drives R-value, fenestration U-factor, and air-leakage envelope rules.
Special zones
- HVHZ
- WBDR
- WUI
- FEMA SFHA possible
Permit office
Union County County Building Department
Working in Union County?
Pull an address-level code packet for any property in Union County. SkyCanvass resolves the parcel, looks up the adopted edition + the Union County-specific amendments listed above, and emits a cited packet ready for permit submittal.
See the South Carolina state overview for the broader context, or browse the state directory.
Pull a Union County code packet.
Free to start — property lookups, state code access, the hail map, and your first storm report on us. No credit card required to look up an address.