Rockville, 68 Rocks Chapel Road, Lisnamore, Crossgar, Co Down, BT30 9HN

Rockville is a long, plain two-storey gabled house of possible 18th-century construction, located on the south side of Rocks Chapel Road roughly a mile south of Crossgar in Co Down. The property's shorter wings, originally part single-storey, were heightened around 1970, significantly extending its overall length.

The building is set right on the road edge, though its front façade faces away from the road in a roughly southern direction. This south-facing front is generally symmetrical. At ground floor centre is the entrance, a panelled and glazed door with thick jambs and a segmental fanlight. To the left of the door are three relatively small sash windows with vertical glazing bars, and to the far left is a modern single-storey flat-roofed bay. To the right of the doorway are three similar sash windows with a modern glazed door and enlarged window at far right. The first floor contains six sash windows with Georgian panes. At far left and far right, between the chimney stacks, are the sections raised circa 1970—the western section raised about 3 feet and the eastern section by roughly 7–8 feet. Both sections feature large picture windows, with a modern door adjoining the western window. The western gable has a large modern window to each floor. The eastern gable has a small single-storey gabled section attached.

The rear façade, facing onto the road, is symmetrical. At ground floor centre is a panelled timber door with a segmental fanlight featuring 'spider's web' tracery. To left and right are two widely spaced sash windows, with five similar windows to the first floor. To the east is the single-storey section attached to the eastern gable, featuring a panelled door with segmental fanlight and two segmental 'eyebrow'-like windows to the left. This single-storey portion's façade was recently remodelled by the owner. The eastern gable of the single-storey section is set on the squint, and a short return section has been added to the south. The façade is finished in dry dash. The gabled roof is covered in natural slate with four brick chimney stacks and cast iron rainwater goods.

To the immediate east is a laneway flanked by tall square gate pillars in random rubble, both topped with pyramidal caps. The laneway was widened recently and the eastern pillar shifted slightly further east. To the west of the western pillar is a short section of high rubble walling with a segmental arched pedestrian gate fitted with a simple wrought iron gate.

Across Rocks Chapel Road to the north is another high rubble wall with vehicle and pedestrian gates similar in style. Behind this wall stands a collection of disused rubble-built outbuildings, two and single storey. The northwestern outbuilding flanks the roadside and has lost much of its roof. To its east lies another outbuilding with its gable facing the vehicle gateway. This outbuilding's south gable features a large elliptical archway with a timber-sheeted loft door above.

To the front of the house, beyond the garden, is a gravel drive, beyond which lies a small field bordered by a rubble wall (relatively high in places). This field was apparently once used as a bleach green in connection with a pre-1835 bleach mill that once stood to the southwest.