Originally built as storekeeper’s offices in the early 19th century, it was constructed on the southern edge of Old Gunwharf, facing the bridge connecting both wharves. Officers and clerks at the time had an excellent view of their valuable guns and stores, and the loading and off-loading operations from hoys and wherries.

For its modest size this is a grand building in a classical style with an elegant central pediment; it was also well-planned for its purpose. The Flemish brickwork has alternating red stretchers and dark kiln-burnt headers, typical of the new buildings at Gunwharf of the time.

With the redevelopment of gunwharf, the Old Customs House is now a fine pub.