31a, St James's Square SW1 is a Grade II listed building in the Westminster local planning authority area, England. First listed on 5 February 1970. A Georgian Terrace house. 1 related planning application.

31a, St James's Square SW1

WRENN ID
steep-obsidian-cedar
Grade
II
Local Planning Authority
Westminster
Constituency
Cities of London and Westminster MP: Rachel Blake (Lab)
Country
England
Date first listed
5 February 1970
Type
Terrace house
Period
Georgian
Address
31a, St James's Square SW1, City of Westminster, SW1Y 4JR
OS grid reference
TQ 296 803
Coordinates
51.50689, -0.1339
Source
Historic England listing

Also on this page: EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

31A St James's Square is a Grade II listed terrace house located on a corner site, built around 1772 with the top two floors added after 1850. The building features brown brick and a slate roof, standing five storeys tall with a basement. It is two windows wide facing the former John Street, with one blind window on the return to the square. The entrance is on the left, featuring an original panelled door set within a pedimented doorcase designed by Brian O'Rorke in 1936. The windows have recessed glazing bar sashes beneath flat gauged arches. There is a deep stone plat band above the ground floor and a sill band at the first floor, along with a brick sill band at the third floor. The crowning stone modillion cornice may be the original, reset. The return side has one blind window centered on each floor. The property is enclosed by cast iron area railings. Inside, the interior is plain, with a staircase compartment that contains an open well stair leading to the rear.

Local climate

31a, St James's Square 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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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • No sale records on file
  • Related listed building consents — 1 application
  • 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
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