Loudoun County handles building permits for all unincorporated areas and the Town of Leesburg, while the incorporated towns of Purcellville and Hamilton maintain their own independent building departments. The county enforces specific zoning overlays including the Blue Ridge Mountains Conservation District and various floodplain districts that require additional environmental review. Applicants must verify jurisdiction as the county does not issue permits for projects located within the independent town limits of Purcellville or Hamilton.
The county enforces a strict Chesapeake Bay Preservation Area overlay which mandates specific stormwater management and vegetation retention requirements for development.
How this fits with the state
The state authority here is Virginia DPOR - Board for Contractors. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.
Source · Loudoun County Department of Building and DevelopmentLast verified · 05 / 2026