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Cwm Mawr Farmhouse

A Grade II Listed Building in Llanfoist Fawr (Llan-ffwyst Fawr), Monmouthshire

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Latitude: 51.7812 / 51°46'52"N

Longitude: -3.0361 / 3°2'9"W

OS Eastings: 328621

OS Northings: 209674

OS Grid: SO286096

Mapcode National: GBR F4.YZHC

Mapcode Global: VH79D.BH9D

Plus Code: 9C3RQXJ7+FH

Entry Name: Cwm Mawr Farmhouse

Listing Date: 15 March 1996

Last Amended: 15 March 1996

Grade: II

Source: Cadw

Source ID: 17247

Building Class: Domestic

Location: Sited high up above the mountain lane to west of Coed-y-Prior and reached from by-roads west off the A 4042. Set into the hillside.

County: Monmouthshire

Community: Llanfoist Fawr (Llan-ffwyst Fawr)

Community: Llanfoist Fawr

Locality: Cwm Llanelen

Traditional County: Monmouthshire

Tagged with: Farmhouse

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c1590 regional farmhouse given a fine early C17 enlargement. Recently renovated. Said to have medieval monastic associations but surviving fabric is no earlier than sub-medieval.


Whitewashed rubble farmhouse wth slate roofs and stone end chimney stacks; renewed leaded casement glazing. The earlier part is uphill with 3-windows to the present, east facing, front and an added gabled porch. The impressive later phase is a tall 2-storey and attic block with a massive stair projection and a pair of diagonally set chimney stacks to the downhill gable end; renewed 4-light windows to the principal rooms. Blocked doorway.


The best-preserved part of the house is the C17 addition which fits into what Fox and Raglan describe as the 'Reserved Chamfer Phase'. Fine stone fireplace to former hall with stop-chamfered jambs and split lintel; another fireplace retains the adjacent spice cupboard. Sunk-chamfered and Wern Hir stopped ceiling beams and, unusually, diagonally set cross beams to former cross passage; screens partition now removed. The staircase tower contains an imposing square stairwell with stone flights up to the Great Chamber and down to the cellar; the existence of a stone staircase would seem to place the enlargement earlier in the C17 rather than later when oak staircases were more usual in houses of this type. The stair tower has a deeply splayed recess to former window and another deeply splayed lancet at the base, now lighting a bathroom. A secondary staircase leads up from the Great Chamber to the attic. The finest surviving features of the interior are the surviving ornate doorheads with ogee and double roll-mouldings; one of these is to the Great Chamber but the other is unusually in the attic and apparently in-situ. The C17 roof is of 3-bays with pegged A-frame trusses with tenoned collars and two tiers of trenched purlins; one attic window has a reeded surround to splay. The early part has upper-cruck trusses but is otherwise largely altered.

Reasons for Listing

Listed as a fine example of a sub-medieval regional house.

External Links

External links are from the relevant listing authority and, where applicable, Wikidata. Wikidata IDs may be related buildings as well as this specific building. If you want to add or update a link, you will need to do so by editing the Wikidata entry.

Recommended Books

Other nearby listed buildings

  • II Embanked Aqueduct over Ochram Brook
    Carrying the canal on a hairpin bend over the Ochram Brook on the southern edge of the Community Council area.
  • II Cwm Celyn Farmhouse
    Situated on the north side of a by-lane reached off the A 4042 and over the canal. The farmhouse is set above and at right angles to the farmyard.
  • II Barn Bridge ( Canal Bridge no 89 )
    Spanning the canal uphill and to south of Llanellen village, approximately 0.5km south of bridge No 90.
  • II Popular Bridge ( Canal Bridge no 87 )
    Spanning the canal to the west of Ochram Farm and to north-east of a hairpin bend; carries the lane to Cwm Celyn and beyond.
  • II Morgans Bridge ( Canal Bridge no 90 )
    Spanning the canal uphill and to south-west of Llanellen village, approximately 0.5km south of bridge No 92.
  • II Bridge No. 85 Monmouthshire and Brecon Canal
    The canal runs parallel to the A4052, separating Llanover village from Upper Llanover. It forms the eastern boundary of the Brecon Beacons National Park. The bridges are numbered from south to north
  • II Dan-yr-heol
    About 600m west of the A4052 on the road from Abergavennny to Upper Llanover and Blaenavon.
  • II Heol Gerrig Bridge ( Canal Bridge no 92 )
    Spanning the canal uphill from Llanellen village; carrying the hill lane from the north-west side of the village up towards Coed-y-Prior Common and Ffrwd Wood.

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