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Cof Cymru: National Historic Assets of Wales · Wales

Barn at Plas Glasgwm

Bro Machno, Conwy, Wales

A Grade II listed building in Glasgwm, Bro Machno, Conwy, designated on 17 July 1992.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Barn at Plas Glasgwm, Bro Machno, 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
Agriculture and Subsistence
Date of designation
17 July 1992
Locality
Glasgwm
Community
Bro Machno
Unitary authority
Conwy
Country
Wales
Coordinates
53.03668, -3.83056
Cadw reference
5899

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)
  • 1899 · 119 Snowdon (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

Below Glasgwm Road, immediately to W of Plas Glasgwm farmhouse.

C18 barn.

Slate roof, hipped to N. Rubble walls, roughly squared and roughly coursed on plinth of heavy flat stones. S gable end truncated and altered to form modern broad entrance for agricultural machinery but barn not 'destroyed' as recorded in RCAHM Wales Caernarvonshire Inventory. W elevation has to L, doorway with deep stone lintel, and to R, doorway with re-used C15/C16 doorhead with 4-centred arch. N elevation has square pitching window. Outbuilding to N end of E side.

Interior has old roof trusses of collar and tie beam type with queen posts, but N truss of different type with curved principals and tie beam only. Two tiers of purlins.

Included for group value with Plas Glasgwm farmhouse.

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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