27 Main Street, Castlerock, Coleraine, Co. Londonderry, BT51 4RA

A symmetrical split-level three-and two-storey-over-basement red-brick house, now divided into three apartments, built around 1890 and located on the north side of Main Street in Castlerock overlooking Castlerock Beach. The building is rectangular on plan with projecting gabled end bays featuring two-storey canted bays, a two-storey L-shaped gabled wing to the southeast, a refurbished flat-roof conservatory to the southwest, and a modern uPVC conservatory to the northwest. Number 27 occupies the ground and first floor of the southeast gable and interlinking bay, accessed by the conservatory to the northwest.

The pitched natural slate roof is half-hipped to the central gable at the southwest with blue and black angled ridge tiles and red-brick chimneystacks, some with clay pots. Timber bargeboards on brackets have timber-sheeted soffits with quatrefoil detailing. Plastic rainwater goods sit on modillioned timber eaves with timber-sheeted soffits. The walling is Flemish-bonded red brick with channel-rusticated strip render quoins to the gabled bays and a continuous sill course between floors. The canted bays and conservatory have painted smooth render. Windows are generally uPVC, segmental-headed at ground floor in plain reveals with lugged painted render surrounds and also to the two-storey canted bays at the northeast. First-floor windows are pointed-headed, paired to the gables and set into segmental-headed reveals with red brick voussoirs and decorative polychrome hood moulds. Some segmental-headed 2/2 timber sash windows with horizontal glazing bars and horns remain at basement level. The conservatory at the southwest has replacement timber-framed windows with leaded-and-stained glass top-lights.

The entrance elevation faces southwest and is symmetrically arranged, comprising a central entrance bay flanked by slightly projecting gabled end bays and abutted by the refurbished conservatory, which provides access to numbers 27 and 29, over a red-brick basement. The gables are connected by a narrow interlinking bay with a replacement leaded-and-stained glass window at each floor. Each gabled bay has paired windows to the first floor over two windows at ground floor. The right gable has an early twentieth-century double-leaf glazed timber door with a two-paned transom light to the basement. The left gable has a 2/2 sash window at right and is abutted by a single-storey flat-roof extension lit by 2/2 timber sash windows and a replacement glazed timber door providing access to number 31 at the southeast. The central entrance bay is two windows wide at first floor. The conservatory has channel-rusticated corner piers rising to parapet piers with a partially intact timber balustrade and turned balusters, lit by timber-framed windows with a continuous sill course and moulded apron panels below. It opens to the southwest with a set of replacement glazed timber doors. The basement of the conservatory has two replacement timber-sheeted doors at the northwest and one to the southeast with a 2/2 sash window.

The northwest elevation has a square-headed window to the first-floor centre over two at ground floor. The basement level is abutted by the modern uPVC conservatory and has a 2/2 timber sash window at left. The northeast elevation is three-storey and symmetrically arranged. The central bay has two square-headed windows at the second floor and two sets of paired windows at the first and ground floors. The flanking gabled bays each have a window to the second floor over two-storey canted bays. The southeast elevation is abutted by the two-storey L-shaped gabled wing. The northeast gable has a pointed-headed window over a canted bay with a leaded roof and a flat-roof entrance porch providing access to number 31 at right. The porch has double-leaf bolection-moulded three-panel timber doors with a transom light and sidelights having margin panes and coloured glass panels. The southwest gable of the two-storey wing is abutted by a single-storey red-brick extension, connecting a modern two-storey red-brick dwelling under separate ownership.

The building is situated on a rectangular plot overlooking the Irish Sea in a residential area on the north side of Main Street in Castlerock. The basement to the southwest side of the house is enclosed with Flemish-bonded red-brick walls having painted coping stones topped with original decorative wrought-iron railings. The basement yard is laid with concrete and accessed from the northwest by a segmental-headed opening with a timber frame. The garden is laid with modern paving and gravel to the southwest and is lawned to the northeast, both bounded by rubblestone walls. At the southwest entrance are a set of centred square painted render piers with pointed caps supporting original iron latch-gates. A modern two-storey red-brick building has been built directly to the southeast. A tarmacadamed driveway from Main Street leads to the entrance to number 31.