Y Berllan is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 24 May 2000. House.

Y Berllan

WRENN ID
tangled-vestry-solstice
Grade
II
Local Planning Authority
Gwynedd
Constituency
Bangor Aberconwy MP: Claire Hughes (Lab)
Country
Wales
Date first listed
24 May 2000
Type
House
Address
Y Berllan, Penrhyn Park, Llandygai
OS grid reference
SH 602 725
Coordinates
53.23113, -4.09571
Source
Cadw listing

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

Description

Y Berllan is a two-storey, T-shaped building with a longer east-west range extending south, parallel to the east-west range of the T-plan. The building is constructed of roughly coursed rubblestone, with some areas finished with roughcast. It has a slate roof with deep verges and carved purlin ends. The east front features a 3-light, 24-paned casement window on the ground floor of a projecting gable, and a 2-light, 16-paned casement above, both with voussoirs to slightly cambered heads. To the left is a 2-light, 12-paned window and a 4-panel door (with glazed top panels) set under an open lean-to porch in the angle of the gable. The south front of the long east-west range includes an entrance to the far left, immediately followed by a 2-light, 12-paned casement window, with another directly above within a gabled dormer that breaks the eaves. A tall 2-light, 12-paned window is positioned to the right, likely illuminating the staircase. Prominent chimney stacks are a key feature. Integrated chimney stacks with stone bases and paired diagonal purple brick shafts are found on the west wall of the long east-west range and the south wall of the north-south range. Similar lateral stacks are on the north side of the shorter east-west range, with the western stack having a brick base and a single tall diagonal brick shaft. A single-storey, lean-to brick outbuilding is attached to the north-west corner of this range, and a boundary wall is attached to its south, screening the gable end of the long east-west range. The building is part of a group of two buildings, along with 4A. The interior was not inspected.

Local climate

Y Berllan sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.

It experiences an average of 37 freeze-thaw cycles a year, more than 67% of listed buildings. Of these, 19 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

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  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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Nearby listed buildings

  1. Y Berllan Grade II 9 m
  2. Arfryn, Argoed & Coed llys Grade II 98 m
  3. Maes-y-Gerddi Grade II 122 m
  4. Kitchen garden wall and attached outbuildings Grade II 127 m
  5. Chapel Remains Grade II 383 m
  6. Walls and attached structures to terraced flower garden Grade II 583 m
  7. Penrhyn Castle Grade I 587 m
  8. Penrhyn Park Boundary Wall (partly in Llanllechid community) Grade II 706 m
  9. Plas y Coed Grade II 820 m
  10. Former Stables at Plas y Coed Grade II 846 m