Yewtree House, 100 Drumnaconagher Road, Drumnaconagher, Ballynahinch, Co Down, BT24 8YH

Yewtree House is a plain two-storey farmhouse dating from approximately the 1860s, located at the end of a lane south of Drumnaconagher Road, roughly two and a half miles east of Ballynahinch. The building may in part represent the raising in height of an earlier pre-1834 dwelling.

The front façade faces roughly south and is asymmetrical. It is finished in lined render with in-out quoins and features a modern panelled and glazed door with fanlight positioned to the right of centre. To the left are two windows with modern frames, and to the right of the door are four further windows on the first floor, aligned with the ground floor openings. The east and west gables each have a single window to the first floor. The rear elevation contains a full-height gabled return to the left of centre, with two large windows to its gable and a smaller window to the first floor of the west face. The east face of the return has a partly glazed door and window to the ground floor and two windows to the first floor. The main portion of the house has a window to the ground floor of the rear façade to the left of the return, and to the right a window to the ground floor and one to the first floor. The roof is slated with four evenly spaced rendered chimney stacks, one of which may be a dummy. Cast iron and PVC rainwater goods are present. All window frames are modern.

A house is shown on the Ordnance Survey map of 1834 but is not noted in the near-contemporary valuation, suggesting it was modest and probably single-storey at that time. The building may have been the "dwelling house" advertised to let in September 1809 as part of Mary Brook bleach green, which comprised a bleaching mill and seventy acres. The asymmetry of the present structure could suggest the original dwelling with its roof raised.

To the south of the house, set at the end of a long garden, is a large two-storey outbuilding originally built as a bleach mill, probably dating from the late 18th century. This was the bleaching mill mentioned in the 1809 advertisement. By the mid-1830s it was no longer in use and does not appear in the valuation of that period. The Ordnance Survey map of 1858 marks it as "Old bleach mill". The same map also shows an old bleach green watch house, noted as "in ruins", in the centre of the field to the west of the house.

A small single-storey vernacular dwelling stands at the south end of the tree-lined lawn to the front of the house, built sometime after 1858.