Cilmaenllwyd is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 25 September 2002. House.
Cilmaenllwyd
- WRENN ID
- slow-spindle-thyme
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Caerfyrddin MP: Ann Davies (PC)
- Country
- Wales
- Date first listed
- 25 September 2002
- Type
- House
- Address
- Cilmaenllwyd, Trapp, Dyffryn Cennen, Carmarthenshire
- OS grid reference
- SN 664 199
- Coordinates
- 51.86183, -3.94086
- Source
- Cadw listing
Description
Cilmaenllwyd is a two-storey house built of stone with a slate roof. The front, facing southwest, features three window openings that have been enlarged and two added buttresses. There is a large stone chimney on the right and two smaller chimneys. At the rear, there is a two-storey gabled cross wing with a roof that sweeps down over additions, including a window on each floor and a small window in an addition to the right. A later small porch is positioned over the doorway on the left. To the right of this, the walling is slightly set back, featuring a small ground floor window, two upper floor windows, and a single doorway on the ground floor.
Inside, the main room has heavy chamfered beams, with some joists displaying reeded decoration and a large fireplace with a curved bressumer. In an adjacent room, one of the beams has a broach stop, and the joists also have reeded decoration. There is a later wooden stair in the room beyond. On the upper floor, there are three collar-and-tie-beam roof trusses with raking struts, and to the northwest, two tie-beam trusses with curved collars.
In the cross wing, the parlour features chamfered joists with hollow stops. Above, in the chamber, there is an open roof with two arched trusses. The window retains a wooden lintel with recesses for diamond mullions, and part of a transom and one visible mullion can be seen.
Local climate
Cilmaenllwyd sits in one of the wettest parts of the UK, with an average of 1,450 mm of rain a year. This makes it wetter than 98% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 94% of listed buildings.
It experiences an average of 42 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 21 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
More on this building
Sign in or create a free account to unlock:
- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
Similar buildings
The closest matches to this building from all 493,000 UK listed buildings, by architecture, period and materials.
this building 1 similar nearby listed buildings
Nearby listed buildings
- Lan Farmhouse and attached cowshed
- Carreg Cennen Castle
- Walled garden and attached outbuildings at Carreg Cennen House.
- Carreg Cennen House
- The Post Office
- Telephone call-box (01558 823304)
- Pont-y-Trap
- Farm buildings on NE angle of yard at Cwrt Bryn y Beirdd
- Outbuilding on E side of yard at Cwrt Bryn y Beirdd
- Cwrt Bryn y Beirdd