Land Development Services

Fairfax County, Virginia

CONTACT INFORMATION: Regular hours for calls and emails are 8 a.m. – 4 p.m., Monday through Thursday, and 9:15 a.m. - 4 p.m. on Friday.

TTY 711

12055 Government Center Pkwy
Fairfax, VA 22035

Bill Hicks,

Codes and Standards



Building Codes

Fairfax County is required to enforce the Virginia Uniform Statewide Building Code (USBC) and the Statewide Fire Prevention Code (SFPC). Both codes are administered by the Virginia Department of Housing and Community Development and reference the 2015 International Codes as published by the International Code Council.  Learn more about the USBC, referenced codes and their adoption dates since 1973.

Statewide Codes

NOTE:  Virginia adopts the 2018 Uniform Statewide Building Code (USBC) - EFFECTIVE JULY 1, 2021

From July 1, 2021, until June 30, 2022, permit applicants may choose to use the technical provisions of either the 2015 or 2018 USBC. Mixing provisions between the two editions of the code is prohibited. Beginning July 1, 2022, all applications and plans must meet the 2018 USBC requirements.

County Code

Local Design Load Criteria

Select to see table

Type Criteria
Ground snow load 25 psf 1.25 kN/m2
Ultimate Wind Speed (Vult):    

Risk Category I
Risk Category II and Residential
Risk Category III

105 mph
115 mph
120 mph

47 m/s
51 m/s
54 m/s

Frost depth
24 in.
600 mm
Earthquake spectral response acceleration
For site-specific designer may obtain information from:
at short periods: 0.129
at 1 second period: 0.053
Residential Seismic Design Category A
Weathering probability for concrete severe
Termite infestation probability moderate to heavy
Decay probability slight to moderate
Ice shield underlayment required yes
Flood hazards (date of entry into National Flood Insurance Program) 3/5/1990
Winter Design Temperature 17°F -9°C
Air freezing index <=1500°F <=815°C
Mean annual temperature 50°F 10°C
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