ADU Design in Altavista, VA

ADU Design in Virginia: what governs your project

Virginia has no statewide ADU statute; ADUs are governed by each county and city zoning ordinance. Fairfax County, Arlington, Alexandria, and Richmond have each modernized their ADU rules in recent years, but there is no state-level mandate.

Energy code

Permitting varies by jurisdiction: common local requirements include size caps relative to the primary home, setback and height limits, and standard building permits. Septic and well rules apply in rural counties through the state health department.

Permitting & plan check

Local building officials enforce the Virginia Uniform Statewide Building Code, so the base code is consistent across the state. Northern Virginia and Hampton Roads jurisdictions run sophisticated electronic review; Chesapeake Bay localities add preservation-act review, and historic districts in Richmond, Alexandria, and elsewhere add architectural review boards.

Good to know

• The 2011 Mineral, Virginia earthquake was felt across the East Coast and pushed seismic detailing into wider practice in the Mid-Atlantic.
• Northern Virginia's marine clays are among the most problematic soils on the East Coast for foundations and tunneling.
• The Hampton Roads region's military installations make it one of the most concentrated defense-construction markets in the country.

Every discipline, one team