Adopted edition
IRC 2021
Local amendments override state floor.
VA · County
Fairfax County, VA.
Fairfax County is in VA (IECC zone 3A, design wind 90 mph).
Design wind speed
90 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
Fairfax County County — fairfaxcounty.gov
www.fairfaxcounty.gov/landdevelopmentCommon amendments + overlays
What's specific to this county.
- §01 County has local amendments to the state floor — consult the building department.
City directory
2 cities indexed in Fairfax County.
Each city page lists the local amendments (if any), parent county, and the local permit office.
Working in Fairfax County?
Pull an address-level code packet for any property in Fairfax County. SkyCanvass resolves the parcel, looks up the adopted edition + the Fairfax County-specific amendments listed above, and emits a cited packet ready for permit submittal.
See the Virginia state overview for the broader context, or browse the state directory.
Pull a Fairfax 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.