Milestone on A470 is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 14 December 2004. Milestone.

Milestone on A470

WRENN ID
deep-cobalt-mist
Grade
II
Local Planning Authority
Powys
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
14 December 2004
Type
Milestone
Address
Milestone on A470, Dolhelfa, St. Harmon
OS grid reference
SN 929 735
Coordinates
52.34974, -3.57235
Source
Cadw listing

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

Description

This is a freestone mile marker located on the A470. It has a segmental top and is painted white. The marker features black-painted letters that read 'Rhayader 5 miles' and 'Aberystwyth 29 miles.'

Local climate

Milestone on A470 sits in one of the wettest parts of the UK, with an average of 1,200 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 84% of listed buildings.

It experiences an average of 54 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 33 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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Nearby listed buildings

  1. Milestone on A470 Grade II 1.6 km
  2. Attached Agricultural Range to Nannerth Ffwrdd Farmhouse Grade II 2.4 km
  3. Nannerth Ffwrdd Farmhouse Grade II 2.4 km
  4. Nannerth Ganol Grade II 2.5 km
  5. Milestone on Mountain Road to Aberystwyth Grade II 2.7 km
  6. Cilrhye, including attached farm ranges Grade II 3.7 km
  7. Cwmyrychen Grade II 3.8 km
  8. Gilfach farmhouse including attached former cow house Grade II* 3.9 km
  9. Treheslog Farmhouse Grade II 5.0 km
  10. Clochfaen Cottage Grade II 5.5 km