The West Quay Wall is the most imposing relic of old Bridgwater Castle.
A section of castle wall survives exposed on West Quay. This is the northern part of the east curtain wall. It is over four metres thick, made of red Wembdon sandstone and blue Lias limestone from the Poldens in a rubble construction. When complete the walls may have been rendered and whitewashed to provide a smooth finish This section of wall survives because it was subsequently incorporated into later buildings.