4 rules for unincorporated Loudoun County, Virginia.
Verified from official government sources
Loudoun allows accessory dwelling units in specific zoning districts under VA Code §15.2-2292.1. 2023 state law requires localities over 3,500 population to permit at least one ADU type.
Loudoun exempts sheds under 256 square feet from building permits but zoning setback and lot coverage rules still apply. Drone/airspace restrictions near Dulles do not affect shed construction.
Loudoun requires building permits for garage conversions under Virginia USBC. Conversions in HOA neighborhoods often require architectural approval; parking replacement may be required.
Under the Loudoun County Zoning Ordinance (adopted December 13, 2023), a carport is defined as any space outside a building, contiguous to it, wholly or partly covered by a roof, and used for shelter of motor vehicles. Detached accessory structures may generally be located as close as 5 feet from side and rear lot lines provided no windows or doors face the encroached yard; attached carports must meet the principal-structure setbacks of the underlying zoning district. A building permit is required for any carport.
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