12, Downing Street Sw1

No. 12 Downing Street is a terraced town house that dates back to 1682, originally part of Sir George Downing's new street. It was rebuilt or remodeled around 1723 and likely refaced by Kenton Couse around 1766. The building underwent significant reconstruction and expansion towards St. James Park by Raymond Erith between 1960 and 1963. It features red brick with a slate roof and is designed in a Neo-Georgian style, harmonizing with the adjacent properties at Nos. 10 and 11. The house has three storeys and a dormered attic, with a lower ground floor on the west and north sides. The front facade is three windows wide, with a three-window extension, a six-window return on the west side, and five windows on the north side. To the right, there is a single-storey entrance porch with a cornice and parapet. The windows are recessed glazing bar sashes set under flat gauged arches, and there are stone cornices at the first floor and eaves. The interior includes a now subdivided room featuring a two-column screen.