Former Department of Transport Marine Office

The former Marine Office, dating from 1868 and 1874, was designed by W Foale. It is constructed of red brick with blue brick and ashlar dressings, and has slate roofs with five gable and two ridge stacks. The building is in the Gothic Revival style and has a plinth, a ground floor impost band, a first-floor sill band, brick eaves corbels, and shouldered coped gables with stacks or finials.

The building comprises two blocks, one of six windows and the other of four windows, connected by a single-storey link building at ground level and a 20th-century glazed bridge at first floor level, creating a courtyard. First-floor windows are plain sashes with segmental heads and a recessed impost band. The left block has two plain sashes flanked by paired sashes with central shafts, and a further single sash beyond. Dormers with three pointed lights are above. The ground floor has a traceried panelled door and a 20th-century flush door with overlights, alongside sashes; all openings are united by a linked hoodmould. The right return has two plain sashes, and above them, two small round-arched windows. Below, there is a tripartite sash.

The smaller right block has two plain sashes flanked by paired sashes with shafts, with round-arched glazing bar sashes flanked by traceried panelled doors with cusped overlights below. The left return has a pointed recess on the first floor with a tripartite segment-headed sash and a small roundel above. Below, there is a tripartite sash. The link building has a central door and overlight, flanked by single windows.

The rear elevation, facing Trinity House Yard, includes two sashes flanked by paired sashes, a door to the left, and three windows to the right. The right block features seven plain sashes and a central door with cusped overlight, flanked by two plain sashes.