12, Downing Street SW1 is a Grade II listed building in the Westminster local planning authority area, England. First listed on 14 January 1970. Town house. 4 related planning applications.
12, Downing Street SW1
- WRENN ID
- lapsed-porch-soot
- Grade
- II
- Local Planning Authority
- Westminster
- Constituency
- Cities of London and Westminster MP: Rachel Blake (Lab)
- Country
- England
- Date first listed
- 14 January 1970
- Type
- Town house
- Address
- 12, Downing Street SW1, City of Westminster, SW1A 2AD
- OS grid reference
- TQ 300 799
- Coordinates
- 51.50339, -0.12808
- Source
- Historic England listing
Description
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.
Local climate
12, Downing Street SW1 sits in one of the driest parts of the UK, with an average of 690 mm of rain a year. This makes it drier than 95% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 98% of listed buildings.
It experiences an average of 35 freeze-thaw cycles a year, more than 57% of listed buildings. Of these, 16 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
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- No EPC on record for this property
- No sale records on file
- Related listed building consents — 4 applications
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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