Water Mill & Wheel House at Felin Fawr Slate Works is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 11 April 1990. Mill.

Water Mill & Wheel House at Felin Fawr Slate Works

WRENN ID
long-slate-rain
Grade
II
Local Planning Authority
Gwynedd
Constituency
Bangor Aberconwy MP: Claire Hughes (Lab)
Country
Wales
Date first listed
11 April 1990
Type
Mill
Address
Water Mill & Wheel House at Felin Fawr Slate Works, Coed-Y-Parc, Llandygai
OS grid reference
SH 615 663
Coordinates
53.17625, -4.07293
Source
Cadw listing

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

Description

The Water Mill and Wheel House at Felin Fawr Slate Works is a simple, low building with a rectangular plan, oriented roughly north-south. It features a small lower addition with a hip roof attached to the north end, and both the main building and the addition have hipped slate roofs with projecting boarded eaves. The west side of the main range has doorways on the left and right, flanking a central wide doorway, all of which are under long slate lintels and were blocked at the time of inspection. The addition at the north end has an infilled doorway on its west side. There is also a lean-to structure on the east side of the main range. Inside, the building retains a 26-foot (7.9-meter) cast-iron water wheel from 1906, which is set low in the wheelpit.

Local climate

Water Mill & Wheel House at Felin Fawr Slate Works sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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
  • Sale history — 5 transactions since 1995
  • 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. Fitting and Repair Shop at Felin Fawr Slate Works Grade II 43 m
  2. Eastern Slab Mill at Felin Fawr Slate Works Grade II* 50 m
  3. Foundry at Felin Fawr Slate Works Grade II 55 m
  4. Water Wheel House between slab mills at Felin Fawr Slate Works Grade II* 61 m
  5. Western Slab Mill at Felin Fawr Slate Works Grade II* 73 m
  6. Pont Coed-y-parc Grade II 95 m
  7. New Mill House Grade II 107 m
  8. Dam to SW of former Felin Fawr Slate Works Grade II 210 m
  9. Tanysgafell Grade II 511 m
  10. Tanysgafell Grade II 518 m