The Counts of Sponheim enfeoffed Kuno von Pyrmont with holdings and an estate in Lahr in 1438. The estate was under Pyrmont ownership in 1468. Friedrich von Pyrmont sold it in 1472 to Hanns von Lare. In 1790, the Counts of Hildesheim were listed as the landholders. Lahr belonged to the “three-lord” high court of Beltheim, which was shared by the Electorate of Trier, Pfalz-Zweibrücken (heirs of the Counts of Sponheim) and the lordship of Metternich-Winneburg-Beilstein (heirs of the Lords of Braunshorn). In 1773, Lahr belonged to the "Amt" of Baldeneck. In a 1780 partition agreement, Lahr passed together with Beltheim and other places to the Electorate of Trier and thereafter belonged to the Electoral-Trier "Amt" of Baldeneck and the Court of Beltheim.