27 Clarendon St., Londonderry

An end-of-terrace two-bay three-storey townhouse with attic over basement, built in 1862–63. Built as part of a row of twelve early to mid-Victorian townhouses lining the south side of Clarendon Street within the Clarendon Street Conservation Area, at the junction of Clarendon Street and Queen Street.

The principal north elevation is constructed in Flemish bond red brick with a rendered basement level terminating at a string course at ground floor level. The roof is pitched slate with black clay ridge tiles, a single dormer to front and rear, and a large brick chimney stack rising from the west side, centred on the ridge with ten clay pots. Cast-iron guttering and circular downpipes serve the front and rear.

The front entrance comprises five steps up, with the bottom step projecting beyond the boundary wall onto the pavement. The entrance opening has a three-centred arch with a moulded cornice supported by Doric order columns either side of a painted timber four-panelled door surmounted by a single pane overlight. All window openings are square-headed with painted cement rendered reveals and painted sills. Two diminished windows sit to the right of the door, with two windows to the first and second floors (those to the upper floors are not aligned with ground floor openings). Two windows to basement level sit directly below the ground floor windows. A narrow pitched roof dormer sits to the right. All windows are replacement uPVC casements unless otherwise stated.

The east elevation is abutted by the adjoining building at No. 25 Clarendon Street. The west gable elevation is blank with a cement rendered wall surmounted by a large red brick chimney.

The south rear elevation is brick (with cement rendered basement level) and comprises three storeys with attic over basement. The main block's left bay includes a door opening to basement level with single uPVC casement windows to ground, first and second floor levels (that to the second floor is not aligned with the windows below), and a pitched roof uPVC-clad dormer above with a single uPVC casement window. The right bay is abutted by a rear return; the exposed section has a 3/3 timber sliding sash window. A brick rear return (shared with No. 25) extends to the right. The rear return's south gable is abutted by a modern single-storey extension; the exposed section has a single uPVC casement window to the first and second floors. The east face is abutted by the rear return of No. 25. The west face has a uPVC door to basement level and a uPVC casement window to the second floor on the left.

The property is set behind a low rendered wall surmounted by black painted metal railings. A small enclosed yard lies to the rear, bounded by a stone wall along Queen Street and modern single and two-storey extensions to the east and south.