Banwell Castle, terraces and courtyard walls

Banwell Castle, along with its terraces and courtyard walls, was built around 1848 for John Dyer Sympson. The structure features rubble with freestone dressings and a slate roof.

On the garden front, the main block has five windows, with the central three set forward between small circular turrets. This section is three storeys high. An attached two-storey octagonal tower has three windows, and there is a single-storey wing to the east with two windows. The windows are either mullioned or transmullioned and have drips, which are continuous at the second floor. The east wing features sixteen-light glazing bar sashes, and there is a large mullioned bay window on the ground floor to the left. The entire facade is topped with corbelled embattled parapets adorned with decorative loops.

The courtyard front is also three storeys tall and has seven windows, all under parapets similar to the garden front. To the left, there is a circular turret with slit windows, followed by two bays that are set back, featuring slits under drips. The ground floor includes a projecting entrance porch and an adjoining room, flanked by embattled turrets on either side of a Tudor arch doorway. Two bays extend forward, one with a three-storey transmullioned window at the stairwell and the other with a two-storey canted bay. A hexagonal turret contains one window, and the last bay steps back and is plain with slits.

In front of the castle is a terrace with a trefoil pierced parapet, and lions rampant with swords on embattled octagonal gate piers flank six steps. To the right, there is another terrace behind a pair of circular embattled turrets with cross loops.

Inside, the spaces are modest yet elaborately decorated. The entrance hall features mock linenfold panelling, particularly around a central fireplace. The staircase has a flat octagonal newel and balusters paired with rich decorative panels. The drawing and dining rooms contain stone Tudor arch fireplaces and plaster-framed ceilings with foliate decoration.

The building is accompanied by a terrace and a dairy, although the architect is not known despite the building's date and quality of design.