10 Trevor Hill, Newry, Co Down, BT34 1DN

The right-hand building of a pair of three-storey granite houses with basement, built in classical revival style on the east side of Trevor Hill. Dating from between 1800 and 1819, it is a relatively unaltered example of this architectural type and forms a significant part of a group of imposing and elegant town houses within the conservation area.

The building is constructed of squared granite rubble laid in courses, three bays wide, with a pitched natural slate roof, tile verge to the right gable, three modern skylights to the front pitch, and a modern chimney to the right gable. Half-round metal rainwater goods with downpipe at right complete the roof furniture.

The front façade features six granite steps rising to the front door, flanked by wrought iron boot scrapers at top and foot. The entrance is a modern six-panelled painted timber door with beaded muntin, set between a pair of fluted Doric columns supporting a dentiled entablature. Above is a plainly glazed fanlight, all contained within a segmental-headed opening with dressed granite encasement. The left jamb is shared with a coach arch to the left bay of the house. The coach arch contains a pair of painted tongue-and-groove timber doors, each with a small timber panel (formerly a window), with the right leaf containing a wicket gate. The tympanum is infilled with tongue-and-groove panels in a radial pattern, and the coach way has granite cobbles to its threshold.

To the right of the front door is a 6/6 sliding sash window with granite cill. At basement level, a passage runs across the front with a window (with metal security bars) directly below the ground floor window. Beneath the external steps, the right cheek has a tongue-and-groove sheeted fire door. At first floor are three equally spaced windows, only the left one aligned with ground floor openings, all 6/6 sliding sashes. At second floor are three 3/6 sliding sash windows, aligned with those below. All window openings have stepped brick quoins, soldier course heads, painted and rendered reveals, and granite cills.

The right gable is abutted by a lower building; its exposed section is cement-rendered with a small two-paned fixed window. The left gable is a party wall with the adjoining house. The rear elevation is constructed of random rubble with brick dressings and a raised brick eaves course. It features a boarded-up segmental-headed opening landing window to the centre between ground and first floors. At first floor left is a tripartite window comprising a 2/6 sliding sash flanked by two 2/2 sliding sashes. To first floor right is a boarded-up window opening. Between first and second floors at centre is a segmental-headed sliding sash stained glass landing window, with the top sash having a segmental head. At second floor left, aligned with the opening below, is a tripartite window consisting of two three-paned casements fitted into a sash box, flanked by two 2/1 sliding sashes. At second floor right, aligned with the opening below, is a 2/2 sliding sash window. All rear windows have granite cills with cemented reveals.

The original railings enclose the basement and steps, consisting of spiked plain rails with posts on a chamfered granite base wall. A further set of railings runs up the left-side steps between the coach arch and front door.

The building, shown on the 1835 Ordnance Survey map with its neighbour, was described in an 1863 valuation as three and a half storeys high. It is presumed the façade was originally rendered. The façade would have been different in its original state: the second floor windows were originally 6/3 sashes (as shown in the Historic Monuments Record photograph), the entrance door was six-panelled with bolection mouldings, and above it was a leaded peacock-tail fanlight. The building was once the home of Dr. Francis C. Crossle, a 19th-century historian. It was vacant until 1999 and was included on the Ulster Architectural Heritage Society's buildings at risk register. It is now in office use. Trevor Hill was laid out in the late 18th century and developed in the first years of the 19th century.