Boundary Stones at Ngr Sy 68917322 is a Grade II listed building in the Dorset local planning authority area, England. First listed on 17 May 1993. Boundary marker.
Boundary Stones at Ngr Sy 68917322
- WRENN ID
- floating-timber-bistre
- Grade
- II
- Local Planning Authority
- Dorset
- Constituency
- South Dorset MP: Lloyd Hatton (Lab)
- Country
- England
- Date first listed
- 17 May 1993
- Type
- Boundary marker
- Address
- Boundary Stones at Ngr Sy 68917322, New Road, Portland
- OS grid reference
- SY 689 732
- Coordinates
- 50.55791, -2.44025
- Source
- Historic England listing
Description
Two boundary markers are located at the junction of New Road and Old Hill in Portland. These markers date from the 19th century. The marker to the northeast is built into the retaining wall, which curves around to the bottom of Old Hill. Its upper part has been defaced, but it displays the number 31, with its root or foundation also exposed. The opposite marker is a free-standing square stone with a rounded top at the end of the retaining wall to New Road. It shows the number 30 to the northeast and has an inscription to the northwest stating, "This stone removed 3'6" East." These markers are representative of various boundary markers, typically associated with Admiralty or War Department boundaries on the island. They also serve as a reminder that Old Hill was the main access route to Tophill from Underhill until New Road was constructed in 1810.
Local climate
Boundary Stones at Ngr Sy 68917322 receives an average of 840 mm of rain a year. This makes it wetter than 55% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 77% of listed buildings.
It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% 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.
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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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