Virginia: Tidewater and Piedmont » Northern Piedmont » Loudoun County » Leesburg » Patterson House Patterson House Details c. 1759. 4 Loudoun St., S.E. This area west of King Street was in the eighteenth century the elite housing section of Leesburg, as illustrated by this impressive fivebay stone structure and its neighbor. Several other similar houses that used to stand nearby have vanished. Writing Credits Author: Richard Guy Wilson et al.