15 Castle Street

15 Castle Street is a house dating from the 18th century, with alterations and extensions over time. The front elevation is of roughcast render beneath a slate roof, with tall end stacks. Brickwork is visible on the left side, and stone is used, set in brick, on the right. The front has a three-window arrangement over one-and-a-half storeys. The windows are wooden, with narrow glazing bars and quarries. Dormers with gabled half-shapes break the roofline, featuring moulded bargeboards and finials. The doorway, offset to the right, is flanked by windows and has a panelled door with a four-pane overlight, sheltered by a segmental slate hood supported on curved decorative brackets. A shallow buttress runs along the right-hand end of the building.

The south gable, facing Record Street, has two windows with recently renewed diagonally-set timber mullions. To the right, a bowed front leads to a rear wing, with a tripartite sash window on the ground floor and a twelve-pane hornless sash window above. The rear of the property has a three-light casement with quarries to the right of the upper storey, below a flat-roofed conservatory. A late 20th-century two-storey block is attached to the left. The rear wing is also adjoined by No. 1 Record Street.

The house was originally divided into two units, with direct entry to the smaller, right-hand unit. This room has a small fireplace to the right end with a timber lintel, and a box-framed partition towards the centre. The ceiling is likely from the 18th century, displaying relatively small, shallow-chamfered cross-beams and wide joists. Near the top of the entrance is a fragment of a cruck blade with a large mortise. The left-hand room contains a large fireplace offset to the right, with a long cambered timber lintel and a small triangular niche on the left-hand reveal. Plaster behind the niche suggests the fireplace is a later addition. The north wall is box-panelled with wattle and daub infill. Stone stairs lead to the rear right corner and to cellars. The cellar beneath the main range has a large, medium-chamfered cross-beam and a cobbled floor. A separate cellar, located beneath a Georgian room, is whitewashed and has an external opening to the south, likely used for beer barrels. A straight stair, inserted along the rear wall, rises to the upper storey, featuring plain balusters, newels, and a moulded handrail. The rear wing has a bowed front facing Record Street and a small, classical-style fireplace to the rear wall. A flat-roofed conservatory from the 1960s has been added to the rear left. Upstairs, in the north gable end, fragments of box-panelling with wattle and daub infill remain. A partition retains part of a cruck blade near the front wall, incorporating a low cambered tie-beam mortised into its side, a collar and vertical struts.