Atlantic Lodge, 13 The Promenade, Castlerock, Coleraine, Co Londonderry, BT51 4RF

Atlantic Lodge is a small, compact two-storey red brick villa built in 1882, situated on the south side of The Promenade at Castlerock with views over the sea. The building exemplifies late Victorian seaside architecture with characteristic features of the period.

The front elevation faces roughly north and is symmetrically arranged. At ground floor level, a broad segmental-headed doorway occupies the centre, fitted with glazed and panelled double doors and a segmental fanlight. Flanking this doorway on both left and right are canted single-storey bays, each containing a large plain sash window to either side beneath a flat roof. These bays appear originally to have been topped with hipped roofs. Above, the first floor displays three relatively small segmental-headed windows with plain sash frames.

The eastern gable contains two windows to each floor arranged symmetrically, all similar in character to those on the first floor front. The western gable has a comparable arrangement, although the first-floor window to the right has been shortened and fitted with a single pane in a recent frame. A small two-storey coach house is attached to the west side and abuts the right-hand edge of this gable.

The main roof is gabled with a shallow pitch and overhang, recently re-covered in pan tiles. Two low brick chimneys are positioned side-on close to the centre of the ridge; both appear to have been recently rebuilt in modern red brick and are topped with four tall decorative pots each. PVC rainwater goods are modern additions.

A substantial two-storey lean-to extension has been added to the rear elevation in recent times. The eastern face of this extension contains a partly glazed door at ground floor and two plain sash windows above. The southern face shows two ground-floor sash windows and a slightly larger segmental-headed sash window to the first floor. Between the western face of the extension and the eastern face of the coach house sits a single-storey lean-to conservatory, which is roofed in pan tiles and features a large Velux window. Above the conservatory, the rear façade of the main house has a first-floor window matching those to the front; to the right, another similar window appears, with a slightly larger plain sash window at ground-floor level.

The attached coach house is a two-storey structure with a flat-arched vehicle doorway to the ground floor of its northern gable, beside which is a small segmental-headed sash window. The centre of the first floor contains a small sash window, with a smaller square window directly below at ground level. The left side of this elevation is constructed in basalt rubble whilst the right side is rendered. Due to the dramatic rise in ground level towards the rear, the southern gable of the coach house functions as single-storey only and features a partly glazed door. The upper floor of the western elevation is rendered to the left and basalt rubble to the right, with no openings. The shallow-pitched gabled roof of the coach house is covered in corrugated asbestos.

The property is enclosed to the front by a low basalt rubble wall topped with limestone rubble coping. A vehicle gateway at the western end is fitted with recent low timber-sheeted gates flanked by recent brick piers with pyramidal caps. A taller wall of matching basalt rubble and limestone coping extends along the western side. The front garden extends around to the eastern side and rear of the house, where the ground rises significantly. A recently built modern dwelling occupies land that formerly belonged to this property.