Plas-uchaf is a Grade II* listed building in the Denbighshire local planning authority area, Wales. First listed on 9 June 1952. A Post-medieval House.

Plas-uchaf

WRENN ID
vast-jamb-plum
Grade
II*
Local Planning Authority
Denbighshire
Constituency
Clwyd East MP: Becky Gittins (Lab)
Country
Wales
Date first listed
9 June 1952
Type
House
Period
Post-medieval
Address
Plas-uchaf, Eglwyseg, World's End, Llangollen, Llantysilio
OS grid reference
SJ 229 479
Coordinates
53.02354, -3.15068
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Plas-uchaf is a house of probable 17th-century origin, with later additions and alterations. It is built with a high plinth of local rubble stonework, featuring large gritstone quoins, and has decorative timber framing above on both the front and back elevations. The roof is covered in graded slate, with excellent laced valley gutters. The plan comprises a central hall bay, a service bay to the east, later single-storey extensions, and a contemporary cross parlour wing at the west end. The main entrance door is set within a curious depressed ogee bolection moulded surround; the oak door itself is from the 1990s, although a shaped doorhead from the original period remains central to the rear bay.

The upper floor framing is square, two panels high, with three panels on the forward gable end of the west wing, all featuring counterchanging diagonal strutting to create a lozenge decorative effect. Diagonal strutting is also present on the king post of the gable. Sections of the timber framing exhibit vertical studding with a centre rail, and close studding to the rear. Most windows have been replaced with painted frames and leaded glazing in the 1990s, however, one original 3-light Tudor window with blind spandrels remains in the west gable end, adjacent to a large stack. Three small gables project from the stone west elevation of the wing. Tall, rebuilt stacks are topped with stone crenels. A single-storey extension to the east has a hipped slate roof, with further service rooms attached to the front.

The interior was completely refurbished in the 1990s. The drawing room in the northwest corner now has a deeply coffered moulded ceiling, although the original plain timber lintel and stone chamfered jambs of the gable fireplace survive. A narrower front room in the wing contains an interesting 17th-century stone lintel, carved with strapwork around a central rose, which was recovered from Scotland. The lintel is supported by late 19th-century tapered and moulded pilasters carved with sunflowers. The partition between the central hall bay and the service bay retains wattle and daub infilling to the truss, with the structural members clearly marked.

Local climate

Plas-uchaf receives an average of 920 mm of rain a year. This makes it wetter than 70% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 73% of listed buildings.

It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 28 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.

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  2. Ty Canol Grade II 933 m
  3. Tan-y-graig Grade II 1.4 km
  4. Old Farmhouse at Ty-brith Grade II 1.6 km
  5. Eglwyseg Bridge Grade II 2.2 km
  6. Plas yn Eglwyseg Grade II 2.2 km
  7. Lime Kiln above Bryn-goleu Grade II 2.5 km
  8. Bwlch-issa Farmhouse Grade II 2.9 km
  9. Outbuilding at Bwlch-issa Grade II 2.9 km
  10. Farm Building at Bwlch-issa Grade II 2.9 km