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Cof Cymru: National Historic Assets of Wales · Wales

Plas Llandecwyn

Talsarnau, Gwynedd, Wales

A Grade II listed building in Llandecwyn, Talsarnau, Gwynedd, designated on 28 April 1952.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Plas Llandecwyn, Talsarnau, Gwynedd, 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
28 April 1952
Locality
Llandecwyn
Community
Talsarnau
Unitary authority
Gwynedd
Country
Wales
Coordinates
52.91640, -4.03547
Cadw reference
4770

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)
  • 1896 · Sheet 7. Ordnance Survey of England and Wales. (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

Set back from the E side of the country lane, once the country road to Maentwrog, which leads to the Church of St Tecwyn.

The house appears to be essentially sub-medieval in origin, with a layout consistent with an early C17 date. External detail the result of later remodelling (of early C19 character). Little is known of its early history, but by the nineteenth century, it formed part of the Plas Tan y Bwlch estate, and was a holding of over 372 acres (150.61 hectares) in 1842. Derelict by the mid twentieth century, it was purchased and renovated by the present owner.

Small gentry house of sub-medieval form - 2 storeyed with end chimneys. Mortared rubble masonry; slate roof with tall gable stacks with dripstones and capping (that to N gable raised and hooded). Principal elevation faces W and is a long 4 window range, with openings generally offset to the right, taking account of the large principal fireplace at the N end. Doorway to right of centre, flanked by 12-pane sash windows (one to its left, two to the right); 3x 9-paned sash windows aligned above. The elevation is stepped up slightly to the left, and 2 wider 12-pane sashes to the ground floor, with hood moulds perhaps indicating earlier openings; a single 9-pane sash window above.
Service accommodation is in parallel to the rear, roofed as an outshut of the main range. Gabled dormer and inserted rooflights, with tall stack towards SW end, serving fireplace. Glazed roof inserted for conservatory at NE corner of this range.
SW gable has doorway to kitchen at right, with small 6-paned window to its left, and larger 6-pane horned sash to right, with a small-paned casement window in partially blocked doorway at far right.

House is planned with entrance hall with heated parlour to the right, main hall with fireplace stair to the left; service accommodation in parallel range at rear. Entrance hall formerly had partitions to either side, but of these, only the upright timbers of the parlour partition survive. Hall has large inglenook fireplace with chamfered bressumer, and chimney stair alongside. Smaller fireplace to parlour, with chamfered stone bressumer. Plain stone bressumer to kitchen fireplace.

Listed as a sub-medieval small gentry house retaining much of its original form and layout, and with good external character.

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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