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Fernside Mill

A Grade II Listed Building in Trellech United (Tryleg Unedig), Monmouthshire

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Latitude: 51.7616 / 51°45'41"N

Longitude: -2.7028 / 2°42'10"W

OS Eastings: 351589

OS Northings: 207219

OS Grid: SO515072

Mapcode National: GBR JL.06TC

Mapcode Global: VH871.3ZGG

Entry Name: Fernside Mill

Listing Date: 28 February 2001

Last Amended: 28 February 2001

Grade: II

Source: Cadw

Source ID: 24948

Building Class: Industrial

Location: On the north side of the Whitebrook valley road and about 2000m west of the Church of the Holy Trinity.

County: Monmouthshire

Town: Monmouth

Community: Trellech United (Tryleg Unedig)

Community: Trellech United

Locality: Whitebrook

Traditional County: Monmouthshire

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Mitchel Troy


This is the only complete paper mill surviving in the Whitebrook valley and very possibly the only one left in Wales. It is not known when it was built, but it appears early C19 in architectural character and it was certainly in existence in 1842. All the paper mills in the valley seem to have gone out of production soon after the Wye Valley Railway opened in 1876. Water power was by then no longer needed and the railways meant that the necessary rags could easily be collected to the central industrial areas, and this also coincided with the great increase in the use of wood fibre in paper making which required large premises and mechanical production.


A three storey mill building built backing onto the mill dam so that the the top floor is level with and has direct access to the road through the gable end and the other two floors are below the water level in the mill pond giving a 5m head. The building is constructed of coursed squared rock faced local sandstone rubble with a late C20 concrete pantile roof. The mill is gable end onto the road and has an elliptically headed boaded door and Victorian wall post box beside it. The gable end overhangs. The elevation onto the millpond (west) is single storey and is timber framed with vertical louvres, these are to ventilate the paper drying floor. The down stream (east) elevation is three storeys and has two doors and three windows on the ground floor and five windows on the first floor, all have elliptical heads, the windows are 3-light timber casements. The upper floor had vertical louvres in 1975 but these have now been replaced by horizontal boarding. The far gable was not seen at resurvey but had windows to the ground and top floor in 1975.


The interior was not available for inspection at resurvey. The presumed arrangement is drying floor at the top, paper making floor in the middle and rag floor at the bottom where the Hollander rag beating machine and the water wheel would have been.

Reasons for Listing

Included as a very rare survivor of a complete paper mill, now possibly unique in Wales.

Recommended Books

Other nearby listed buildings

  • II Signpost Penalt/Trelleck
    On the south side of the Whitebrook valley road and about 2500m west of the Church of the Holy Trinity. It is at the crossroads for Whitebrook, Penallt, Monmouth and The Narth.
  • II Stable Block at The Argoed
    Set in the slope at right angles to the house and closing the north west side of the forecourt. The Argoed is set its own grounds, 600m south of Penallt. This range is also known as the Great Stable
  • II* The Argoed
    Set in its own landscaped grounds about 600m south of Penallt (Pentwyn) with magnificent views to the east. Reached from the west drive, close to the fork in the by-road to Tregagle.
  • II Garden House at The Argoed
    Set on the garden wall on the north side of the lawn about 50m north east of The Argoed.
  • II Clearwater House
    On the north side of the Whitebrook valley road and about 450m west of the Church of the Holy Trinity.
  • II Chimney of former Clearwater Mill
    On the north side of the Whitebrook valley road and about 350m west of the Church of the Holy Trinity.

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