The castle, privately owned, is not open to visitors.
Surrounded by dry ditches, the construction consists of a main building and two wings in return of angle framing a court. Covered with hipped roofs, these buildings comprise a ground floor, a first floor with segmental arch lintel windows and an attic floor illuminated by open gable dormers. The dormer in the centre of the main building's facade overlooking the main courtyard is set between two pilasters supporting an arched pediment and flanked by fins. The west facade is flanked on its corners by two round towers with a slightly sloping base, vestiges of the former fortress. A circular turret topped with a conical roof is attached to the southwest tower. A balustraded terrace, linked to the park by a wide stone bridge, stands between the two towers.
A 19th century pavilion, comprising a basement, two square floors, an attic floor and an attic floor under a broken roof, is attached to the north wing. It is pierced on the east side by a high round-headed French window opening on to a curved balcony with a wrought iron sill.
The whole is preceded, in the centre of a gate, by a portal with bossed jambs surmounted by lions bearing the coat of arms of Thibaud de Noblet and Saulx-Tavannes.
The castle of Terreau, its outbuildings, the chapel, the gate, the moat and the bridge, as well as the French park, its bower and its architectural and decorative elements are listed as historical monuments by order of December 28, 1984.