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Cof Cymru: National Historic Assets of Wales · Wales

Outbuilding at Plas Iolyn

Pentrefoelas, Conwy, Wales

A Grade II listed building in Tre Brys, Pentrefoelas, Conwy, designated on 23 June 1967.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Outbuilding at Plas Iolyn, Pentrefoelas, Conwy, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Listed building, Grade II
Broad class
Domestic
Date of designation
23 June 1967
Locality
Tre Brys
Town
Pentrefoelas
Community
Pentrefoelas
Unitary authority
Conwy
Country
Wales
Coordinates
53.03863, -3.66888
Cadw reference
133

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1795 map "To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most humbly inscribed by his obedient humble servant" (Llyfrgell Genedlaethol Cymru – The National Library of Wales).

Historical maps covering this location

  • 1795 · To Sir Watkin Williams-Wynn Bart ... the map of the six counties of North Wales is most… (Llyfrgell Genedlaethol Cymru – The National Library of Wales)
  • 1830 · V.3:11-15:XV. Britisches Reich. A. Kon: England. b. Frstenthum Wales: Shire: 37-40 (David Rumsey Map Collection, Stanford Libraries)
  • 1883 · Watershed map England, Wales 3. (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 120 Corwen (Hills) (David Rumsey Map Collection, Stanford Libraries)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)

Get directions ↗

This record in Cadw's own full report ↗

Cadw's description

The building stands apart, E of the house, on sloping ground, now the garden, and near the approach drive.

The building is probably C17 in origin, perhaps originally part of a carthouse, but appears to have been reduced in size. It is now used as a garden room. Plas Iolyn farmhouse was once the major sub-medieval house of this district.

Rubble stonework with slated roof, 2 storeys. A single doorway in the N gable gives access to the lower storey. It has a rectangular headed doorway with continuous chamfer. The upper floor is reached by an external flight of 5 steps at right angles to the W side, and has a battened stable door. The S gable is set at at a distinct angle.

The interior is of 2 bays, with a central chamfered and stopped floor beam, and a second parallel beam at the start of the angled wall, chamfered on one side only.

Included as part of the group of important farm buildings associated with the historically important farmstead of Plas Iolyn.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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