The Customs House

The Customs House, built around 1794 and now functioning as Milford Haven Museum, is a three-storey structure made of red rubble stone, which was originally stuccoed or roughcast, topped with asbestos sheet roofing. The central section features a three-window design with a pedimental gable, believed to be the original part of the building, flanked by two-storey wings that have six windows each. These wings may be original or could have been added before 1812. The central gable includes a lunette but has lost all trace of its original mouldings. The openings on the first and second floors are vertically linked within sunk panels, while the ground floor showcases arched openings. The stone voussoirs are rough, and the ground and first floor feature 20th-century casement windows and doors.

The wings have hipped end gables and similar casement windows, although the first-floor windows on the left wing have had their lintels raised. The ground floor openings include blank arched heads above the casement windows or doors, with the left wing showing two windows and a door, while the right wing has three windows, one with a fanlight, and a door that has altered the original arch-head. The first floor contains a loading door in the fourth bay and a blank window in the sixth bay. The east end features a 20th-century brick lean-to, and there is a large 20th-century flat-roofed addition at the rear.

Inside, there are arcaded axial spine walls on the ground floor and arched recesses on the rear wall. A significant transverse arch spans the first floor of the east wing, with arches connecting the central section to the wings.