No. 12 And Attached Railings

No. 12 is a terrace house, built around 1790 to 1793, and subsequently altered in the 19th and 20th centuries. It was designed by John Palmer as part of an incomplete development near St James's Square, on land leased in 1790. Great Bedford Street was intended as one of four diagonal approaches to St James's Square, but the intended continuation to the northeast was never completed.

The front of the building is faced with limestone ashlar, with rubble to the basement and rear. It is four storeys and a basement, with a three-window front. The first floor has three plate glass sash windows with splayed reveals and horns. The second floor has similar windows with stone sills. The third floor features three windows in plain reveals with stone sills, and a central window guard. The ground floor has two plate glass sash windows with splayed reveals and stone sills to the right, and a six-panel door with flush fielded panels and glazing within a pedimented Doric doorcase. A paved crossover, flush with the pavement, includes a wrought iron footscraper. The basement has two six-pane sash windows with a continuous stone sill, and a plank door. A stone band course runs above the ground floor, and a sill band is present on the first floor, alongside a frieze and moulded cornice above the second floor, an eaves cornice, and a coped parapet. The rear elevation has two dormers with 19th-century casement windows, and a two-pane sash window to the second floor. The interior remains uninspected.

The roof is double-pile, with a rebuilt front incorporating a full third floor and a Welsh slate mansard to the rear. Party walls are coped, with two ashlar stacks to the right, which share some early clay pots with No. 14 Great Bedford Street. An axial ashlar stack rises from the rear wall. Attached wrought iron railings and a gate are present, with cast arrowheads on limestone bases. The building's historical context includes records of title, maps from 1794 and 1808, and a survey of air raid damage from 1942. Numbers 7-11 Great Bedford Street were destroyed by bombing in 1942.