Former Port of London Authority Building is a Grade II* listed building in the City of London local planning authority area, England. First listed on 3 March 1972. Office. 41 related planning applications.
Former Port of London Authority Building
- WRENN ID
- guardian-chalk-stoat
- Grade
- II*
- Local Planning Authority
- City of London
- Constituency
- Cities of London and Westminster MP: Rachel Blake (Lab)
- Country
- England
- Date first listed
- 3 March 1972
- Type
- Office
- Address
- Former Port of London Authority Building, 10, Trinity Square Ec3, City and County of the City of London, EC3N 4AJ
- OS grid reference
- TQ 334 807
- Coordinates
- 51.51035, -0.07832
- Source
- Historic England listing
Description
The Former Port of London Authority Building, built between 1912 and 1922 by Sir Edwin Cooper, is a large, detached, monumental structure made of Portland stone. It has a nearly square plan with an entrance located at the canted southeast corner. The building originally featured a plain courtyard that was filled by a large rotunda, which was destroyed during World War II. It consists of four storeys plus a basement, topped with a slated mansard that is treated as a stone attic for the end pavilions and the entrance.
The design includes a deep entablature with pairs of Corinthian columns in antis at the pavilions. The entrance portico, also in antis, features four columns and has an entablature topped by a balustrade in front of the attic. Above this, a broad tower is embellished with Corinthian pilasters and piers, an arched niche, and a colossal figure sculpture, with a stepped upper part.
Inside, the entrance hall and corridors are of notable distinction, and there is a suite of richly panelled rooms on the second floor, including a dining room, a chairman's room, and a board room, with the latter two featuring exceptional carved decoration.
Local climate
Former Port of London Authority Building 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 — 41 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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