4, Castle Street

No. 4 Castle Street is a house that dates from the 17th century or earlier and has been altered over time. It is constructed from rubble with large, roughly-shaped quoins and cut dressings, topped by a 20th-century synthetic blue slate roof featuring a yellow brick chimney stack. The building has an L-shaped plan and consists of two storeys with three irregular bays.

The entrance, located left of centre, features a renewed six-panel door with an overlight above. The windows have late 20th-century glazing set in early 19th-century openings, with the right bay's windows having been enlarged from old mullioned windows. There are also jambs from a blocked doorway beneath the left window on the ground floor. The right end gable has raised reverse-stepped coping and an end stack.

At the rear, a projecting wing on the left displays a reverse-stepped gable and has renewed windows in old openings, which are fitted with timber lintels on the inner return.

Inside, the ground floor north room includes a chamfered stone fireplace with a strainer beam above it, along with a blocked doorway that has a Tudor-arched head framed in a chamfered square. The roofs of both wings feature principal rafter trusses with collars and carpenter's numbering.