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Cof Cymru: National Historic Assets of Wales · Wales

Caerllwyn Isaf and attached byre/stable

Ynysddu, Caerphilly, Wales

The record

Designation
Listed building, Grade II
Broad class
Domestic
Date of designation
27 January 1982
Locality
Mynyddislwyn
Community
Ynysddu
Unitary authority
Caerphilly
Country
Wales
Coordinates
51.63359, -3.17729
Cadw reference
1901

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David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1636 "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

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This record in Cadw's own full report ↗

Cadw's description

On the W flank of Mynyddislwyn, close to the N/S mountain road which leads S to Cwmfelinfach in the Sirhowy Valley; stands in a walled and gated enclosure with stone stile to field.

Probably C17, roof raised and rear wing added late C19 or c 1900. The two small detached byres flanking the main unit, not included, are also of the roughly similar later date. When listed in 1982 roof was mainly of stone slates but these now replaced with composite tiles.

Farmhouse with attached byre and stable. Of whitewashed stone rubble with composite tile roof; corniced rubble end and ridge stacks with yellow brick capping courses. 2 storeys. Elevation facing road has a small 12-pane casement window under eaves, another masked; hood extends over two 6-pane ground floor casements. Attached byre range has 3 doorways under wooden lintels, to right the cross passage, centre the byre and end left the stable, with signs of masonry alteration between the two latter. Garden facing elevation of original unit has small 6-pane casement under eaves, 2 altered ground floor openings, one with hood, and at right angles the 2-storey wing of c 1900.

Interior of old part of house is much remodelled with roof raised in late C19 but retains spiral stairs to right of fireplace; cross passage backing onto chimney wall adjoins byre with loft, still in use as cowshed with mangers for tethered cows. Attached stable - straight joint with byre - has brick floor; formerly used for shire houses and chaff house, the chaff cutting machinery formerly worked by horse in adjacent yard; wooden stairs to loft which has trusses with collar and tie and 3 rows of trenched purlins.

Listed as a traditional regional farmhouse and byre retaining much of its historic fabric.

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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