33 Clarendon St., Londonderry

33 Clarendon Street is a mid-terrace two-bay three-storey townhouse with attic, built in 1862 in red brick in Georgian style. It forms part of a row of twelve similar houses (Nos. 29–51 Clarendon Street) that line the south side of Clarendon Street in Londonderry and sits within the Clarendon Street Conservation Area.

The building is rectangular on plan with a projecting rear return. The principal north elevation, which faces onto Clarendon Street, is set behind a low rendered wall topped with black painted replacement metal railings. This elevation is constructed in Flemish bond brickwork with a rendered plinth. The entrance doorway has a three-centred-arch opening with a moulded surround and is flanked by columns of Doric order supporting a recessed moulded cornice. The entrance itself comprises a painted timber four-panelled door beneath an Adam-style fanlight. All window openings on the front elevation are square-headed with painted cement rendered reveals and painted sills. The ground floor has a single window to the right of the door; the first and second floors each have two windows, not aligned with the ground floor openings. All are 6/6 timber sliding sash windows. A narrow pitched roof dormer is centred on the front elevation and contains a 6/3 timber sliding sash window.

The pitched roof is clad in natural slate with black clay ridge tiles. A large rendered chimney stack rises from the east side, centred on the ridge, and carries seven clay pots. Cast-iron guttering and circular downpipes run to the front.

The east and west elevations are abutted by the adjoining buildings (Nos. 31 and 35 Clarendon Street respectively). The south (rear) elevation is constructed in brick for three storeys plus attic. A three-storey rendered and brick rear return projects to the left with a door opening onto the rear courtyard. This return is followed by a pitched roof rendered two-storey return, and then a pitched roof rendered single-storey return. The fenestration to the rear elevation is irregular, with 6/6 timber sliding sash windows to ground and first floors and a uPVC casement to the second floor. The rear elevation was not fully visible at the time of survey.

To the rear of the site stands a two-storey mews building, rendered with a natural slate roof and clipped eaves. Its north face contains three 6/6 timber sliding sash windows to the first floor. The east and west faces are fully abutted by the mews buildings of Nos. 31 and 35 Clarendon Street respectively. The south face displays two blind former window openings to each floor, those on the first floor aligned above the ground floor openings.

The roofing materials are natural slate to the north and uPVC guttering to the south; external walls are brick with timber windows to the north elevation and uPVC windows to the south.