Derwent Oak Farm

Derwent Oak Farm is a house dating from the 17th century, with alterations made in the 18th century. It is constructed of sandstone rubble, featuring a plinth, quoins, and ashlar dressings. The roof is made of Welsh slate and has a yellow brick chimney on the left and an ashlar chimney on the right, with stone gable coping. The building has two storeys and four bays.

The entrance, located in the third bay, consists of a partly-glazed six-panel door set in a plain stone surround with a moulded stone hood. On the ground floor to the left, there is a chamfered four-light window with renewed stone mullions, while the third bay features stone-mullioned three-light windows on both floors. Other windows are 20th century and have plain stone surrounds. The end chimneys are both corniced, with the right one sitting on a plinth.

The left return gable has two small chamfered lights on the first floor, one of which has an iron bar, and one in the gable at the front. The right return gable has a ground-floor sash window with fine glazing bars in a plain stone surround at the rear, along with one chamfered window at the rear of the gable. The rear elevation displays a full-width outshut with a catslide roof and inserted dormers.

Inside, the house features a stone-flagged floor and a wide stone fireplace surround in the left room, which has a flat Tudor-arched lintel beneath a wide irregular wood relieving beam that is notched on the right. The dogleg closed-string staircase has a moulded panelled grip handrail supported by twist-and-urn balusters, with panelled rectangular newels featuring moulded pendants. The string of the staircase includes abacus, acanthus, and dentilled mouldings, along with a pulvinated frieze, extending through all floors into the roof. The roof itself has collared trusses with slightly bowed tie beams and two levels of purlins. The interior also contains some 18th-century two- and three-panel doors, as well as some 17th-century eight-panel doors fitted with 20th-century hardware, possibly introduced from elsewhere, as this property was part of the Hamsterley Hall estate.