Trinity House Landmark is a Grade II listed building in the Dorset local planning authority area, England. Landmark.

Trinity House Landmark

WRENN ID
first-footing-wren
Grade
II
Local Planning Authority
Dorset
Constituency
South Dorset MP: Lloyd Hatton (Lab)
Country
England
Type
Landmark
Address
Trinity House Landmark, Portland Bill Road
OS grid reference
SY 677 682
Coordinates
50.51328, -2.45671
Source
Historic England listing

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

Description

Trinity House Landmark is a structure dating from 1844, located on the south side of Portland Bill Road. It is made of Portland stone ashlar and features a three-sided tapering obelisk that stands approximately 10 meters high, set on a high plinth and topped with a pyramidal crown. The north face of the obelisk is inscribed with "TH 1844".

Local climate

Trinity House Landmark receives an average of 850 mm of rain a year. This makes it wetter than 58% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.

It experiences an average of 14 freeze-thaw cycles a year, fewer than 87% of listed buildings. Of these, 5 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
  • No related consent applications matched
  • 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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