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Cof Cymru: National Historic Assets of Wales · Wales

Islwyn (formerly known as Ty Isa)

Llandderfel, Gwynedd, Wales

A Grade II listed building in Llandderfel, Bala, Gwynedd, designated on 31 January 2001.

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Islwyn (formerly known as Ty Isa), Llandderfel, 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
31 January 2001
Locality
Llandderfel
Town
Bala
Community
Llandderfel
Unitary authority
Gwynedd
Country
Wales
Coordinates
52.92033, -3.51573
Cadw reference
24612

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)
  • 1901 · Sheet 9 and 10. (David Rumsey Map Collection, Stanford Libraries)
  • 1963 · Map No. 32 - Local Government Commission for Wales : [Definitive maps showing proposed… (National Library of Scotland)

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This record in Cadw's own full report ↗

Cadw's description

Set back behind a low-walled, grassed forecourt, adjoining the chapel at right-angles to the L.

Late C19 manse built in 1886 to serve the adjoining, contemporary Calvinistic Methodist chapel. Originally called Ty Isa, according to an inscribed plaque above the entrance.

Two-storey late Victorian manse. Of uncoursed slatestone with red brick quoining to the openings; medium-steep slate roof with brick end chimneys having ceramic pots. Symmetrical 3-bay facade with central entrance; modern glazed door with rectangular glazed overlight. Above this is an inset slate dedication plaque with brick frame; Welsh inscription with date 1886 and 'Ty Isa, Llandderfel'. Original 4-pane sashes with projecting stone sills.

The interior was not inspected at the time of survey.

Listed as a late C19 manse retaining good original character as part of a village chapel and manse group.

Group value with the chapel and Chapel Row terrace.

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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