Water Wheel House between slab mills 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. A Not specified Water wheel house.

Water Wheel House between slab mills at Felin Fawr Slate Works

WRENN ID
grim-pediment-shade
Grade
II*
Local Planning Authority
Gwynedd
Constituency
Bangor Aberconwy MP: Claire Hughes (Lab)
Country
Wales
Date first listed
11 April 1990
Type
Water wheel house
Period
Not specified
Address
Water Wheel House between slab mills at Felin Fawr Slate Works, Coed-Y-Parc, Llandygai
OS grid reference
SH 614 663
Coordinates
53.1763, -4.07385
Source
Cadw listing

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

Description

The Water Wheel House at Felin Fawr Slate Works is a rectangular building, oriented roughly north-south, constructed of reddish brown brick in Flemish garden wall bond. It features a gable-ended slate roof, which has collapsed at the northern end and is mostly missing slates at the southern end. The eastern wall has two surviving full-height openings with slate lintels, while the south gable end contains a tall rectangular window, although the joinery is missing. The northern gable end has also collapsed.

Inside, the building retains an overshot wheel set low in a brick-lined wheelpit. The wheel has a cast-iron frame, with only the lower wooden paddles still intact. The interior also includes drivegear and related machinery, along with an ironwork header tank and panelled angle pilasters over the northern part of the wheelpit.

Local climate

Water Wheel House between slab mills 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 — 1 transaction since 2024
  • 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. Western Slab Mill at Felin Fawr Slate Works Grade II* 12 m
  2. Eastern Slab Mill at Felin Fawr Slate Works Grade II* 13 m
  3. Foundry at Felin Fawr Slate Works Grade II 36 m
  4. Water Mill & Wheel House at Felin Fawr Slate Works Grade II 61 m
  5. Fitting and Repair Shop at Felin Fawr Slate Works Grade II 61 m
  6. Pont Coed-y-parc Grade II 89 m
  7. New Mill House Grade II 104 m
  8. Dam to SW of former Felin Fawr Slate Works Grade II 184 m
  9. Tanysgafell Grade II 489 m
  10. Tanysgafell Grade II 496 m