'Derryowen', 43 Coshquin Road, Londonderry, Co. Londonderry, BT48 ONF

Detached two-storey Arts-and-Crafts style house at Derryowen, built around 1907. The building has an irregular plan with a large projecting two-storey gabled bay to the rear. It is accessed via a long tree-lined avenue from the Buncrana Road, with decorative iron gates hung on substantial square pillars and a low rough-cast rendered wall. The River Foyle lies to the east, and outbuildings adjoin the property to the west towards the Coshquin Road.

The main structure is finished entirely in rough-cast render painted white, with all masonry cills, half-timbering, eaves, window and door reveals, and rainwater goods painted black. The pitched slate roof has three interconnecting gabled ranges. Two tall rough-cast rendered tapered chimney stacks with cornices project through the roof; decorative toothed terracotta ridge tiles and terracotta finials sit at each gable apex. The gables feature half-timber treatment on small carved timber support brackets with plain wide painted timber fascia and soffits. Half-round cast-iron guttering discharges to circular painted cast-iron downpipes, though some sections have been replaced with uPVC.

The north-east elevation, which faces the principal approach, is two bays wide with a further projecting gabled bay to the left. Canted bay windows flank the entrance doorway, each topped with a slated hipped roof; the right-side roof extends to shelter the entrance. First-floor windows are square-headed and aligned above the ground-floor bays. The principal entrance is approached by two painted concrete steps. The timber door has two lower panels with bolection moulding and a single glazed upper pane with coloured leaded glass, repeated in the transom light above, set within a plain architrave. An original brass doorbell in a smooth rendered surround, painted black, sits to the right of the door. A squat square-plan pillar with simple fluting on all four faces stands at the outer corner of the lower step.

Windows throughout are timber sliding sashes with horns, featuring single panes to lower lights and small multi-paned upper lights, except where noted. All window frames have square heads.

The south-east elevation is three bays wide with a further projecting gabled bay to the left, whose lower wall section has chamfered corners. This projecting bay contains paired square-headed windows at ground-floor level and two square-headed windows on the first floor; its gable displays half-timber treatment with plain wide painted timber fascia and soffit. The main elevation features an irregular fenestration pattern. A large tapered chimney stack with a stepped cornice supporting its cap and four clay pots sits left of centre, piercing the roof just above eaves level. A single-storey half-canted bay with hipped slate roof adjoins the gabled bay and main elevation. Beyond this are two small narrow windows to the right of the chimney and two first-floor windows, one to the left and one to the far right. Small ground-floor windows are 4/4 timber sliding sashes; the canted bay windows have been replaced with side-hung casements with fixed small multi-panes above matching the upper sashes elsewhere on the house.

The south-west elevation faces an enclosed yard and comprises the flank ends of three gabled forms separated by steps in plan. The main section sits to the right with a central tapered chimney stack matching that on the south-east elevation, two windows, and an off-centred door to its left. A square-headed door opening contains a vertically sheeted timber door with decorative ironmongery and a plain glazed transom light. To the left of the door are sliding sashes as described. To the right of the door, a red brick (painted) single-storey lean-to abuts the building, its roof clad in profiled plastic panels resembling terracotta tiles; it faces a semi-sunken yard with concrete hard-standing. Stepped back to the right is the end of a tall gabled toilet block with two windows near the inside corner and the remains of a cast-iron water pump opposite. Stepped back again is the return face of the north-west half-timbered gable, which is blank except for a drainpipe and a short chimney stack centred on its eaves. The outbuilding is divided into two: a former coal house now containing a wood pellet boiler nearest the main house, and a store on the other side retaining an original electrical board.

The north-west elevation consists of two half-timbered gables stepped in plan, with a further tall thin gable in the re-entrant corner between them. The left-side gable-end is abutted by a crenellated painted red brick wall. On ground-floor level are two narrow square-headed windows, with two above (not aligned) on the first floor. The right-side gable is blank except for one window at ground-floor level near the inside corner; it has half-timbering and a clay ball finial at the apex of its projecting fascia board. The tall central gable has clipped eaves and contains a square-headed doorway at ground-floor level and a small timber sliding sash window with 3/1 panes at first-floor level.

The entrance gates are a pair of decorative cast-iron replacements. Gate pillars and curved walling are painted white with black painted pyramidal caps; the name 'DERRYOWEN' is indented within the right pillar and highlighted in black.

A range of brick and rubble-stone outbuildings to the south-west of the house form an enclosed yard adjacent to the Coshquin Road. Steel-faced double gates painted black, hung on square rendered pillars also painted white with black pyramidal caps, open directly onto the road. The pillars are flanked by walls supporting simple single-storey lean-to structures, open at one side where a timber eaves beam spans between circular cast-iron columns; the roof is covered in corrugated metal sheeting. A two-storey gabled stable block with natural slate roof, thought to predate the current house, has informally arranged square-headed window and door openings, the largest of which is a double-door; a segmental arch above formed in triple rows of headers suggests this opening has been altered. All outbuilding walls are painted white, with sheeted timber doors, window shutters, and cast-iron rainwater goods on drive-through brackets contrasted in black. A 1½-storey addition with corrugated sheet roofing abuts the north-west gable of the stable block, with a single opening around a straight flight of concrete steps. The remainder of the yard is enclosed by walling, all painted white, connected to the building at the north-west side where further gate posts flanked by crenellated walling support a simple metal farm gate, and at the south-west side where it meets a single-storey abutment.