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Cof Cymru: National Historic Assets of Wales · Wales

Byrllysg

Dyffryn Ardudwy, Gwynedd, Wales

The record

Designation
Listed building, Grade II
Broad class
Domestic
Date of designation
13 April 2005
Locality
Llanenddwyn
Community
Dyffryn Ardudwy
Unitary authority
Gwynedd
Country
Wales
Coordinates
52.79576, -4.08538
Cadw reference
84341

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David Rumsey Map Collection, Stanford Libraries

Shown on 5 historical map sheets, the earliest the 1795 "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).

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This record in Cadw's own full report ↗

Cadw's description

Set back, along a private track, from the SE side of Ffordd y Briws c.1km ENE from Coed Ystumgwern.

One of a number of sub medieval houses in the area, dating from the later C16, a regional house type of 2 units with end chimneys and cross passage plan, originally with hall to one side of the passage and parlour and service room to the other. The house was extensively altered in the mid C18 (dated 1761) and the orientation of the building reversed, the rear of the house then becoming the principal elevation, with dormer windows added to the upper storey.
Recorded in the tithe apportionment of the parish, 1841, as a holding of just over 54 acres(22 hectares); owned by the Honorable Edward Mostyn Lloyd Mostyn and occupied by John Owen.

C16 farmhouse, a 2-storey 2-unit plan, built of mortared rubble masonry with large stones as quoins and lintels. Slate roof with stone parapet copings on rough stone kneelers; tall gable stacks with dripstones and capping.
The principal elevation now faces down the Coed y Byrllysg valley to the SW, a 3-window range with openings towards the centre of the range and with central doorway. The door is half glazed and the windows are timber casements, the upper floor windows set in gabled half dormers that break the eavesline; the central dormer bears the date 1761 inscribed in the stone to L of the window. The footing at the base of the wall to the R of the doorway suggests that they may have been some rebuilding, probably when the building was re-aligned.
The rear elevation (originally the front) also has a doorway towards the centre, with the original doorway to the L, now a partially blocked opening with a window in the upper part. The upper floor has 2 widely spaced small timber casement windows directly under the eaves.
At the R (SE) gable is a lean to addition, now with a roof of profiled metal sheeting, with dripcourse above the present roof level and single doorway at the L end of the SE wall.

The interior retains the original timber framed partitions of the cross passage, and one of the original segmental headed doorways; to the R is evidence for another doorway, now blocked. At the NW end of the house there is a blocked in inglenook fireplace at ground floor level, the fireplace at the opposite end has been removed but the upper floor has a massive fireplace which has been partially blocked and new fireplaces inserted into the reduced openings several times.

Listed as a C16 farmhouse of characteristic regional type which retains traditional character and many original features, of additional interest for the manner in which it was remodelled in the C18.

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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