Adopted edition
Coverage in progress
Local amendments override state floor.
DE · County
New Castle County, DE.
Population: ~570,000. Most Part of Philadelphia Home to major corporations (DuPont, Corteva). Delaware River and Christina River
Design wind speed
130 mph
ASCE 7 Risk Cat II, 3-second gust at 33 ft. Drives fastener spacing, hold-downs, and opening protection.
Climate zone (IECC)
4A
Drives R-value, fenestration U-factor, and air-leakage envelope rules.
Special zones
- HVHZ
- WBDR
- WUI
- FEMA SFHA possible
Permit office
New Castle County County — newcastlede.gov
www.newcastlede.gov/155/Land-Use
Local conditions
- County seat: Wilmington
Common amendments + overlays
What's specific to this county.
- §01 Coastal flood-zone overlays (FEMA AE/VE).
- §02 County has local amendments to the state floor — consult the building department.
Working in New Castle County?
Pull an address-level code packet for any property in New Castle County. SkyCanvass resolves the parcel, looks up the adopted edition + the New Castle County-specific amendments listed above, and emits a cited packet ready for permit submittal.
See the Delaware state overview for the broader context, or browse the state directory.
Pull a New Castle 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.