Boundary Stone at Junction with Squires Lane is a Grade II listed building in the Cornwall local planning authority area, England. First listed on 9 February 1994. Boundary stone.

Boundary Stone at Junction with Squires Lane

WRENN ID
unlit-floor-nightshade
Grade
II
Local Planning Authority
Cornwall
Constituency
St Ives MP: Andrew George (LD)
Country
England
Date first listed
9 February 1994
Type
Boundary stone
Address
Boundary Stone at Junction with Squires Lane, Porthleven Road, Helston
OS grid reference
SW 644 265
Coordinates
50.0924, -5.29415
Source
Historic England listing

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

Description

This is a boundary stone located at the junction with Squires Lane on Porthleven Road in Helston. It is likely from the early 19th century and is made of dressed granite. The stone is a monolith with a round head and has a rectangular shape. The front face features an inscription that reads "HB," which stands for Helston Boundary, with the letters linked together.

Local climate

Boundary Stone at Junction with Squires Lane receives an average of 870 mm of rain a year. This makes it wetter than 63% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.

It experiences an average of 3 freeze-thaw cycles a year, fewer than 99% of listed buildings. Of these, 1 follows at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.2°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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  • Detailed attributes — period, style, materials, features
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  • 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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