Garden Walls, Gates, Pergola of 2 Portland Stone Ionic Columns. Sundial on Portland Stone Ionic Columns at Barham Old Court is a Grade II listed building in the Brent local planning authority area, England. First listed on 15 March 1979. A C18 Garden, monument.

Garden Walls, Gates, Pergola of 2 Portland Stone Ionic Columns. Sundial on Portland Stone Ionic Columns at Barham Old Court

WRENN ID
former-plinth-rush
Grade
II
Local Planning Authority
Brent
Constituency
Brent West MP: Barry Gardiner (Lab)
Country
England
Date first listed
15 March 1979
Type
Garden, monument
Address
Garden Walls, Gates, Pergola of 2 Portland Stone Ionic Columns. Sundial on Portland Stone Ionic Columns at Barham Old Court, Harrow Road
OS grid reference
TQ 171 850
Coordinates
51.55255, -0.31104
Source
Historic England listing

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

Description

The garden walls, gates, and pergola at Barham Old Court date from the 18th century, with some remodeling in the early to mid-19th century. The walls are made of red brick and feature two 18th-century wrought-iron gates. The pergola consists of two Ionic columns made of Portland stone, which also support a 19th-century sundial. The main house, built around 1850, was demolished around 1960.

Local climate

Garden Walls, Gates, Pergola of 2 Portland Stone Ionic Columns. Sundial on Portland Stone Ionic Columns at Barham Old Court 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 97% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 94% of listed buildings.

It experiences an average of 29 freeze-thaw cycles a year, fewer than 67% of listed buildings. Of these, 13 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.

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