Former Porter Tun Room, Whitbread's Brewery (south side) is a Grade II listed building in the City of London local planning authority area, England. First listed on 5 June 1972. Storehouse, conference center. 1 related planning application.

Former Porter Tun Room, Whitbread's Brewery (south side)

WRENN ID
young-spandrel-hyssop
Grade
II
Local Planning Authority
City of London
Constituency
Cities of London and Westminster MP: Rachel Blake (Lab)
Country
England
Date first listed
5 June 1972
Type
Storehouse, conference center
Address
Former Porter Tun Room, Whitbread's Brewery (south side), Milton Street Ec1, Chiswell Street, City and County of the City of London, EC1Y 4SA
OS grid reference
TQ 325 818
Coordinates
51.5204, -0.09143
Source
Historic England listing

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

Description

The Former Porter Tun Room at Whitbread's Brewery, located on the south side, is a storehouse built between 1776 and 1784 that has been adapted for conferences and entertainment. The lower part of the building is now behind additions made around 1979 by Roderick Gradidge and Wolff Olins. It features brown brick set in Flemish bond and a slate roof. The building is two storeys high and has a five-window range facing the yard. The flat-arched windows have frames that are almost flush with the wall and are multi-paned. There are bracketed gutters at the eaves and two metal air vents at the west end. The king-post roof consists of thirteen bays, although the two westernmost bays are now partly obscured. This roof boasts the widest timber span in London after Westminster Hall.

Local climate

Former Porter Tun Room, Whitbread's Brewery (south side) 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 — 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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Nearby listed buildings

  1. Sugar Room, Whitbread's Brewery (South Side) Grade II 27 m
  2. Whitbread's Brewery Buildings (That Part in London Borough of Islington) Grade II 40 m
  3. Bridge Over the Yard, Whitbread's Brewery (South Side) Grade II 45 m
  4. Entrance Wing, Whitbread's Brewery (South Side) Grade II 56 m
  5. Thirteen Bollards in the Yard, Whitbread's Brewery (South Side) Grade II 57 m
  6. 53, 54 and 55, Chiswell Street Grade II 58 m
  7. 56, Chiswell Street Grade II 63 m
  8. Partner's House, Whitbread's Brewery and Attached Railings Grade II* 67 m
  9. Whitbread's Brewery Building, Next to the King's Head Public House Grade II 72 m
  10. Ceramic mural of nine panels on Cromwell Highwalk, Barbican Grade II 80 m