4, Duke Street W1

No. 4 Duke Street is a terraced town house built around 1776 to 1788 as part of the Duke of Manchester's development of Manchester Square on Portman land. The building is constructed of multi-coloured stock brick and has a concealed slate roof. It stands four storeys tall with a basement and features four windows across its façade.

The central doorway is highlighted by a panelled door and a rectangular fanlight with a radial pattern, all framed by a wooden architrave doorcase that includes Ionic pilasters, a fluted frieze, and a dentil cornice. The windows are recessed sashes set under flat gauged red brick arches. The building has a parapet with coping and 20th-century area railings.

Inside, the main front rooms retain impressive ceilings designed in the Adam style and a geometrical staircase with a delicate wrought iron balustrade.