Groenendaal is an incorrect and late spelling for the original Croenendael or Croonendael. Croenendael was a Loons great fief, which together with Hoelbeek and Jonckholt (confer Hoelbeek) formed one fief, owned by the lords of Jonckholt. At the end of the 14th century, the property was divided: Aleidis van Jonckholt, married to Godenoel van Elderen, lord of Elderen, inherited Croenendael. The property subsequently came into the possession of the Lamboy family (1477). The de Grady family owned the property in the mid-18th century (1757). It is Michel Joseph de Grady (+ circa 1786) who converted the old, 17th-century castle in Meuse style into its current, classicist form, as well as the farm. In 1861 the estate was sold to Baron Emile de Rosen de Borgharen. It is still privately owned.
(Immovable Heritage Inventory)