Dunadry House, 42 Ballybentragh Road, Dunadry, Co Antrim, BT41 2HJ

Dunadry House is a two-storey, five-bay house with attics, built in the mid-19th century. Although extensively renovated and extended, it retains significant historic character.

The house features a panelled entrance with plain pilasters and a cornice hood, flanked on either side by 12-pane sashed windows set in moulded surrounds. The upper storey windows are 9-pane sashes. A rectangular fanlight with curvilinear glazing lights the entrance. The building's extremities are dressed with quoins. The attics are lit by semi-circular headed windows with interlaced heads. A two-storey return of later construction adjoins the main block, with unrecessed windows at the rear. Outbuildings, harled and rendered, stand on the site.

The house does not appear on the 1832 Ordnance Survey map but appears on the 1902 map. According to the 1834 first edition Ordnance Survey map, buildings stood on the site to the north-west and south-west. The current house was constructed by 1857, when the Ordnance Survey shows a large building to the south-east of the site in addition to the earlier north-west building. By the 1902 third edition map, these buildings had been adjoined to the west end and the property was marked as Dunadry House, an arrangement that remains substantially unchanged on the 1921 fourth edition map.

The Townland Valuation of 1836 records the site as the house, yard and offices of William Gray, valued at £9. The Griffiths Valuation of 1859 shows the Marquis of Donegal as immediate lessor, with Adam Gray as occupier, the house valued at £10.

The property underwent major renovation in 1979 and 1980 by Isherwood & Ellis of Belfast and Ballymena, during which the chimneys were rebuilt, the roof repaired and re-slated, the exterior rendered, and the sash windows replaced in their original style. More recently, a large new block has been constructed at the rear of the property, connected to the main house by a link block.