Trewin House

Trewin House is a substantial house built circa 1725, with a mid-19th century addition to the left and a later 19th-century wing to the right, together with some 20th-century alterations.

The principal 18th-century house is constructed of brick laid in Flemish bond, with headers in blue-glazed brick and stretchers of red brick, set on a sandstone plinth. It is roofed with a two-span hipped asbestos slate roof with coping tiles to the hips and ridge, and ridge stacks to right and left. The mid-19th century addition to the left is rendered and lined out, also with a hipped asbestos slate roof.

The plan is of double depth, arranged around a central entrance passage with principal rooms to right and left at the front. The entrance passage leads to a rear stair hall, with service rooms on either side. The mid-19th century addition to the left contains a large two-room plan with a small room to the rear connecting to the earlier service room, heated from a stack at the left end. The principal 18th-century rooms are heated from fireplaces at the rear, drawing from the ridge stacks. A single-storey later 19th-century addition is attached to the right, slightly set back, with its original function unknown, but connected to the service rooms.

The 18th-century building presents a symmetrical front elevation of two storeys on plinth with attic, spanning five bays. The ground floor has 12-pane sashes with horns and gauged brick heads, and a central Doric doorcase with pilasters, mutule frieze and modillion cornice, containing a six-panelled fielded door. The first floor carries 12-pane sashes and two hipped dormers, each fitted with a six-pane sash. Brick pilasters and a band course of three courses of brick run above the ground floor windows. The two-storey block to the left has a hipped roof and central stack, with four windows: at first floor all are nine-pane sashes except the second from left, which is blind; at ground floor are 16-pane sashes with the second from left also blind. The left side of this block has two 12-pane sashes at first floor with a central narrow eight-pane sash between them; the ground floor has two 12-pane sashes to the left and 20th-century glazed doors, with a short wall to the right enclosing a small yard.

The right side of the 18th-century building is in plain Flemish bond, with a cellar door to the left featuring a relieving arch, and an eight-pane sash with sidelights at ground floor to the right. The single-storey later 19th-century addition has three mullion and transom windows with segmental heads, weathered buttresses, and an asbestos slate roof with crested ridge tiles and gable-end stack.

The rear of the 18th-century house has a central six-panelled door with a hipped hood, and an eight-pane sash with sidelights to the right. At first-floor level, the left side has a blocked window at ground floor, while the right side has a three-light casement and a central round-headed stair light with keystone and Gothic margin glazing. A 20th-century porch is attached to the right. The rear of the mid-19th century addition to the right is constructed in random slatestone and sandstone rubble and has three windows with varied sashes. A single-storey 20th-century outhouse is attached to the rear. The rear of the single-storey addition has three 20th-century windows and a half-glazed door, with buttresses.

The interior of the entrance hall features a moulded plaster cornice, dado rail, and a segmental arch with keystone and panelled gate, dividing the entrance hall from the stair hall to the rear. The room to the front right has complete fielded panelling with moulded cornice and a chimneypiece with an eared architrave decorated with egg-and-dart moulding and inner bay leaf moulding, topped by a torus frieze below a moulded mantel. The overmantel is eared with the same mouldings repeated. To each side is a round-headed cupboard with shaped shelves and key block, flanked by pilasters, with a lower round-headed cupboard featuring curved shelves below. The room to the left has a moulded floral plaster frieze below a coved cornice; both rooms have six-panelled doors. The end room to the left, of mid-19th century date, has a similar plaster floral frieze, cornice and window shutters.

The stair hall contains an open-well stair with panelling and pilasters to the side, closed string, turned and knopped balusters and columnar newels, with a ramped and moulded grip handrail. The rear of the stair hall has a six-panelled door and a segmental arch with key leading to double-panelled doors into the service room to the left. At first-floor level, the landing has a modillion cornice, a similar segmental arch to the central front room and to the rear right where a 19th-century copied archway leads to rooms in the wing. The doors are panelled throughout. The centre front room at first floor has a moulded plaster cornice.