Boundary Stone at Ngr Sy 6446 7758 is a Grade II listed building in the Dorset local planning authority area, England. Boundary stone.

Boundary Stone at Ngr Sy 6446 7758

WRENN ID
slow-lintel-hawk
Grade
II
Local Planning Authority
Dorset
Constituency
South Dorset MP: Lloyd Hatton (Lab)
Country
England
Type
Boundary stone
Address
Boundary Stone at Ngr Sy 6446 7758, Chesil Bank, Chickerell
OS grid reference
SY 644 775
Coordinates
50.59693, -2.50351
Source
Historic England listing

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

Description

The boundary stone located at NGR SY 6446 7758 is a Grade II listed marker that serves as the boundary between the parishes of Abbotsbury and Portland. This stone predates 1788, the year when Robert Attwooll was paid half a guinea to carve the inscription. Made of Portland stone, it is the only parish boundary marker required for Portland, as Chesil Bank is the sole physical connection to the Dorset mainland. The traditional ceremony of 'Beating the Bounds' is still celebrated occasionally on Ascension Day.

Local climate

Boundary Stone at Ngr Sy 6446 7758 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
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  • 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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