The Old Storehouse

The Old Storehouse is a Grade II* listed building made of limestone rubble with granite dressings and features a hipped slate roof. It has a basement and two storeys, divided into nine bays arranged in a 3-3-3 pattern, with the central three bays slightly advanced and topped with a pediment. The building has a granite plinth, quoins, and surrounds for the arched recesses on the ground floor and the first-floor windows. There is an impost band, a plain two-step cornice, and coping on the pediment and parapets.

The windows are cast-iron with small panes and radiating bars on the ground floor, where the lower openings tilt. The lower windows are set within recessed arches that have limestone ashlar infill. The building features full-width double doors made of painted iron with radiating bar fanlights at the center of the north, east, and west elevations. The upper windows consist of 20 panes with plain surrounds, although the center window on the north side includes a loading door with an iron hoist nearby. There is a basement area on both the north and south sides, with six cellar doors on each side.

The storehouse shares construction similarities with larger storehouses found at other Royal Dockyards, but it is smaller because Pembroke was not used for final fitting out or victualling. It has extensive fireproof construction, including a stone axial wall and stairs, with iron doors. Inside, there are two rows of columns supporting large cast-iron beams, which hold fish-bellied cast-iron joists covered with York stone flagstones. The upper floor has not been inspected but is reported to have an iron roof construction.