Adopted edition
IRC 2021 (DC amendments)
Inherits from DC state floor.
DC · District
District of Columbia, DC.
District of Columbia uses the DC Construction Codes (IRC 2021 base + DC amendments), climate zone 4A, and 95 mph design wind.
Design wind speed
95 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
District of Columbia Department of Buildings
dob.dc.govCommon amendments + overlays
What's specific to this district.
- §01 District-wide DC amendments in 12 DCMR apply through the Department of Buildings.
City directory
1 city indexed in District of Columbia.
Each city page lists the local amendments (if any), parent county, and the local permit office.
Working in District of Columbia?
Pull an address-level code packet for any property in District of Columbia. SkyCanvass resolves the parcel, looks up the adopted edition + the District of Columbia-specific amendments listed above, and emits a cited packet ready for permit submittal.
See the District of Columbia state overview for the broader context, or browse the state directory.
Pull a District of Columbia code packet.
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